Journal articles: 'Total Harmonic Distortion Analysis'

1

Muhammad, Salman, Basit2 Abdul, Ahmad Aemal, Syed Shah zeeshan, and Alam Kamran. "Modeling of Cascaded H-Bridge Multi-level Inverter Having Low Total Harmonic Distortion by using Equal Phase Distribution Method." International Journal of Engineering Works (ISSN: 2409-2770) 6, no. 03 (2019): 84–89. https://doi.org/10.5281/zenodo.2585862.

Full text

Abstract:

Multi-level inverters’ popularity over traditional inverters can be attributed to its low total harmonic distortion. Multi-level inverter is used both for high and low power applications. This study uses Equal phase method to analyze the total Harmonic distortion of 3, 5, 7 and 9 levels by using Cascaded H-Bridge configuration for such analysis. The total harmonic distortions of three, five, seven and nine levels are analyzed, studied and finally their output is compared through fast Fourier transform. Results are acquired by simulating Cascaded H-Bridge Multi-level inverter with MATLAB/Simulink. Simulation results reveal that total Harmonics Distortion reduces as voltage level is increased. Total harmonic distortion for 3, 5, 7 and 9 levels is 41.42, 39.46, 39.40 and 22.50 percent respectively.

APA, Harvard, Vancouver, ISO, and other styles

2

Yogesh Kumar Lahre, Piyush Shrivas, Sakshi Tomar, and Diksha Komra. "Performance analysis of UPQC for total harmonic distortion." World Journal of Advanced Engineering Technology and Sciences 12, no. 1 (2024): 351–63. http://dx.doi.org/10.30574/wjaets.2024.12.1.0241.

Full text

Abstract:

In order to mitigate power quality (PQ) issues in electrical power systems, the Unified Power Quality Conditioner (UPQC) is the main topic of this research study. Power Quality problems, such as voltage sag, voltage swell, harmonics, and flicker, are brought on by the increase in nonlinear loads and the integration of renewable energy sources into traditional systems. Employing a variety of control algorithms and switching techniques, including as the SRF theory, hysteresis controllers, d-q theory of current, and traditional PI controllers, to balance the system, control voltage, and reduce harmonic distortions. For the reduced harmonic distortion, a FFT analysis is done so that the quick response and stability is ensured. UPQC has shown to be a successful method for fully resolving these power quality issues.

APA, Harvard, Vancouver, ISO, and other styles

3

Carvalho, Cesar Augusto Belchior, Genaro Mariniello da Silva, Bruna Cardoso Paz, et al. "Performance and Analysis of n-Type Vertically Stacked Nanowires Regarding Harmonic Distortion." Journal of Integrated Circuits and Systems 15, no. 2 (2020): 1–5. http://dx.doi.org/10.29292/jics.v15i2.202.

Full text

Abstract:

This paper studies the harmonic distortion (or non-linearity) of vertically stacked SOI nanosheets with different fin widths and channel lengths. The total harmonic distortion and third order harmonic distortion are used as figures of merit in this work. The four approaches applied verifies the correlation between the harmonic distortions and the variety of transistor’s dimensions available for analysis.

APA, Harvard, Vancouver, ISO, and other styles

4

Balkrishna, Mirajkar Nilesh, and Dr Rahul Kumar Budania. "Advanced Harmonic Analysis in Industrial Power Systems: Its Impact on Enhancing Power Quality and System Performance." INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 08, no. 11 (2024): 1–7. http://dx.doi.org/10.55041/ijsrem38510.

Full text

Abstract:

This paper presents an advanced harmonic analysis of industrial power systems, focusing on its impact on enhancing power quality and system performance. The study investigates the harmonic distortions caused by nonlinear loads, particularly those introduced by Variable Frequency Drives (VFDs), in a manufacturing plant. Measurements of key electrical parameters, such as voltage, current, and Total Harmonic Distortion (THD), were recorded and analysed. The results reveal significant harmonic distortion levels, exceeding industry standards, which can lead to reduced equipment efficiency and potential damage. By adhering to IEEE 519 guidelines and implementing harmonic mitigation strategies, such as filters and power factor correction, the paper demonstrates how power quality can be improved. The findings provide a foundation for future simulation and optimization efforts aimed at reducing harmonic distortion and enhancing system performance. Keywords: Total Harmonic Distortion (THD), Harmonic Analysis, Power Quality, Industrial Power Systems, Current Distortion.

APA, Harvard, Vancouver, ISO, and other styles

5

Yatim, M. H., A. Ponniran, A. A. Bakar, A. N. Kasiran, K. R. Noor, and J. N. Jumadril. "Analysis of Symmetric and Asymmetric Multilevel Inverter Topologies Using Reduced Number of Switching Devices Circuit Structure." International Journal of Engineering & Technology 7, no. 4.30 (2018): 234. http://dx.doi.org/10.14419/ijet.v7i4.30.22127.

Full text

Abstract:

This paper presents symmetric and asymmetric multilevel inverter principles using reduced number of switching devices circuit structure. Principally, asymmetric multilevel inverter topology able to produce higher output voltage level without modification of the structure in order to reduce total harmonic distortion at the output voltage. In contrast, the number of switching devices need to be increased with symmetric principle when higher output voltage level is considered. In this study, 5-level reduced number of switching devices circuit structure is selected as a circuit configuration for symmetric (5-level structure) and asymmetric (7-level and 9-level structures) multilevel inverters. For switching strategy, modified pulse width modulation and sinusoidal pulse width modulation are selected to produce output voltage levels of the inverter. Modified pulse width modulation used low switching frequency in producing signal and needs higher output voltage levels to achieve low total harmonic distortion. In contrast, sinusoidal pulse width modulation used high switching frequency in order to minimize total harmonic distortion. Theoretically, total harmonic distortion is reduced when number of output voltage level is increased for both cases. The findings show that, the 9-level asymmetric topology has lower total harmonic distortion compared to the 5-level symmetric topology and 7-level asymmetric topology, whereby these inverters using the same circuit configuration. The results show that, the total harmonic distortions of 9-level asymmetric topology, 7-level asymmetric topology and 5-level symmetric topology are 14.54%, 18.08% and 26.92%, respectively with sinusoidal pulse width modulation switching strategy. Meanwhile, with modified pulse width modulation switching strategy, the total harmonic distortions of 9-level asymmetric topology, 7-level asymmetric topology and 5-level symmetric topology are 18.7%, 21.68% and 28.99%, respectively. Therefore, 9-level asymmetric with sinusoidal pulse width modulation switching strategy show the lowest total harmonic distortion with optimum number of switching devices.

APA, Harvard, Vancouver, ISO, and other styles

6

Adesina, Lambe Mutalub, Olalekan Ogunbiyi, Khalil D. Dalegan, and Ahmed B. Olaoye. "Assessment of Total Harmonic Distortion for Power Quality Improvement in Low Voltage Distribution Networks." Journal Of Engineering Research Innovation And Scientific Development 3, no. 1 (2025): 56–71. https://doi.org/10.61448/jerisd31256.

Full text

Abstract:

Ensuring high power quality in low-voltage distribution networks is crucial for efficient and reliable electricity supply. However, the increasing presence of nonlinear loads introduces harmonics into the power system network (PSN), leading to waveform distortions that degrade power quality. These harmonics, primarily generated by electronic devices, motors, generators, and transformers, contribute to power losses, system instability, and unbalanced load distribution at feeder pillars, ultimately affecting service delivery. This study aims to assess the Total Harmonic Distortion (THD) levels in a distribution network powered by a distribution transformer (DT) from a Nigerian power utility company, with a focus on residential, commercial, and smallscale industrial consumers. A Fluke energy analyzer was deployed at the secondary side of the DT, with all necessary calibrations and presetting completed before data acquisition. The collected harmonic data was subsequently processed and analyzed using spreadsheet software to determine the extent of waveform distortion. The results provide insights into the harmonic levels present in the distribution network and their impact on power quality. Findings from the analysis highlight the severity of harmonic distortions, their potential consequences on equipment performance and network stability, and the need for appropriate mitigation strategies. This assessment serves as a foundation for recommending power quality improvement measures to enhance the reliability and efficiency of low-voltage distribution networks.

APA, Harvard, Vancouver, ISO, and other styles

7

Suresh, N., and Samuel Rajesh Babu R. "Reduction of Total Harmonic Distortion in Cascaded H-Bridge Inverter by Pattern Search Technique." International Journal of Electrical and Computer Engineering (IJECE) 7, no. 6 (2017): 3292–98. https://doi.org/10.11591/ijece.v7i6.pp3292-3298.

Full text

Abstract:

Pattern Search technique can be used to find the solution for the optimization problem. In this paper, pattern search algorithm has been utilized to calculate the switching angles for the cascaded H-bridge inverter with the consideration of minimizing total harmonic distortion. Mathematical equations for the optimization problem were formulated by fourier analysis technique. Lower order harmonics such as third, fifth, seventh, ninth and eleventh order harmonics were taken into account to mitigate the total harmonic distortion of the inverter. Simulations have been carried out for thirteen level, fifteen level and seventeen level cascaded H-bridge inverter using matlab software. Total harmonic distortion of voltage and current for resistive load, resistive-inductive load and motor load were analyzed.

APA, Harvard, Vancouver, ISO, and other styles

8

N., Suresh, and R. Samuel Rajesh Babu. "Reduction of Total Harmonic Distortion in Cascaded H-Bridge Inverter by Pattern Search Technique." International Journal of Electrical and Computer Engineering (IJECE) 7, no. 6 (2017): 3292. http://dx.doi.org/10.11591/ijece.v7i6.pp3292-3298.

Full text

Abstract:

Pattern Search technique can be used to find the solution for the optimization problem. In this paper, pattern search algorithm has been utilized to calculate the switching angles for the cascaded H-bridge inverter with the consideration of minimizing total harmonic distortion. Mathematical equations for the optimization problem were formulated by fourier analysis technique. Lower order harmonics such as third, fifth, seventh, ninth and eleventh order harmonics were taken into account to mitigate the total harmonic distortion of the inverter. Simulations have been carried out for thirteen level, fifteen level and seventeen level cascaded H-bridge inverter using matlab software. Total harmonic distortion of voltage and current for resistive load, resistive-inductive load and motor load were analyzed.

APA, Harvard, Vancouver, ISO, and other styles

9

Saad T. Y. Alfalahi. "Harmonic Distortion Analysis and Mitigation in an On-Grid Wind Farm using Passive Filters: A Case Study on the Shahat Distribution Network." Journal of Information Systems Engineering and Management 10, no. 44s (2025): 812–22. https://doi.org/10.52783/jisem.v10i44s.8661.

Full text

Abstract:

The numerous non-linear power electronic components in a wind energy conversion system (WECS) cause harmonic distortion, which diminishes the quality of the electricity produced. For WECS to function optimally with the power grid, these distortions must not exceed the limits established by international standards for total harmonic distortion (THD) in voltage and current waveforms. As required by current rules, this study looks at the harmonic distortion at the point of common coupling (PCC) between a planned 10.5 MW wind farm and the SHAHAT distribution network in northeastern Libya. MATLAB/Simulink is employed to simulate the wind farm conversion units and execute harmonic elimination with passive harmonic filters (PHFs). The frequency spectrum and THD findings at the PCC are assessed in compliance with the IEEE 519 standard. The results demonstrated the significant efficacy of PHFs in reducing low-order harmonics below 2 kHz while being ineffectual in the supra-harmonic zone. The findings of this study are juxtaposed with analogous literature, and the outcomes of this comparison are delineated.

APA, Harvard, Vancouver, ISO, and other styles

10

Al-Sharif, Yahya M., Gamal M. Sowilam, and Tamer A. Kawady. "Harmonic Analysis of Large Grid-Connected PV Systems in Distribution Networks: A Saudi Case Study." International Journal of Photoenergy 2022 (November 23, 2022): 1–14. http://dx.doi.org/10.1155/2022/8821192.

Full text

Abstract:

The increasing penetration of grid-connected PV rooftops at the distribution level still entails significant technical challenges affecting seriously the power quality indices such as harmonics and voltage fluctuations. Owing to the intermittent nature of renewable resources, the changing incident energy from renewables can generate considerable amounts of harmonics. Moreover, power electronic devices and nonlinear loads that are used frequently in the industry may exaggerate the harmonic distortions as well. Accordingly, utilizing suitable filtration techniques for harmonic reduction is crucial. In order to evaluate the impacts of grid-connected PVs in modern grids, a case study on power quality and voltage profile is conducted with a large grid-connected PV microgrid of 9570 kW, feeding a large hospital project in Saudi Arabia as an initial phase of implementing this project in the future. For eliminating the possible increase in harmonic distortion, a single-tuned filter is used to cope with the permissible limits according to the known IEEE standards. This filtering technique is chosen due to its advantages including the simplicity, suitability for significant integer harmonic orders, and low cost. For evaluation tests, a detailed simulation is developed by the ETAP program for the overall selected project as well as the aimed PV subsystem. Several simulation tests are conducted to investigate the harmonic distortion problem. The results show a significant reduction in the individual harmonic distortion (IHD) and the total harmonic distortion (THD) below 8% according to considered IEEE standards for LV networks. Both 6 and 12 pule inverters are considered. This is considered an important step in the realization of such large PV projects in the field.

APA, Harvard, Vancouver, ISO, and other styles

11

Li, Xiang Zhen, Guang Ming Hu, Peng Xin Hou, Yu Bo Fan, and Chun Lin Guo. "Analysis on Harmonics Caused by Connecting Electric Vehicle Chargers with Power Network." Advanced Materials Research 724-725 (August 2013): 1393–97. http://dx.doi.org/10.4028/www.scientific.net/amr.724-725.1393.

Full text

Abstract:

As a class of nonlinear loads in the power system, electric vehicle chargers will produce a certain harmonic pollution for the grid. Before the construction of charging stations, it is necessary for electric vehicle charger (station) connected to the grid to simulate and predict harmonics. The models of single charger and charge station are built separately in order to simulate and analysis the impact of a single and multiple chargers on power quality. The factors of the harmonic current ratio (HRI) and the current total harmonic distortion (THDI) varied with the charging power and the number of the chargers are discussed and analyzed. The generation mechanism of harmonic counteraction and interaction between the chargers are analyzed. The simulation results show that: because of the impedance of the system and the transformer, the harmonic current ratio (HRI) and the current total harmonic distortion (THDI) both increase firstly to some extent and subsequently decrease gently with the increase of the number of the chargers in the same power charging. This phenomenon has nothing to do with the harmonic counteraction and how that happen is discussed and analysis in this paper. And the phenomenon of harmonics interaction and counteraction occurs with the increase of the number of the chargers in different power charging, and the current total harmonic distortion (THDI) declines and tends to maintain a relatively stable value.

APA, Harvard, Vancouver, ISO, and other styles

12

K., Kandan, Senthilkumar K., and Dhivya K. "TOTAL HARMONIC DISTORTION ANALYSIS OF MATRIX CONVERTER." International Journal of Multidisciplinary Research and Modern Education 2, no. 2 (2016): 174–82. https://doi.org/10.5281/zenodo.154667.

Full text

Abstract:

This paper deals with the validation and design analysis of Matrix converter for variable frequency using mathematical equations. The analysis was done using Venturini modulation algorithm. The PI controller is used for Matrix converter to reduce Total Harmonic Distortion (THD) in the output current. The comparative study is done for open loop and closed loop PI compensation in MATLAB-Simulink. Furthermore, the output waveforms are produced with significant reduction in the Total Harmonic Distortion.

APA, Harvard, Vancouver, ISO, and other styles

13

T., D. Dongale1 D. A. Kulkarni2 M. D. Uplane 3. "HARMONICS ANALYSIS OF FOUR SWITCH THREE PHASE INVERTER." International Journal of Information Technology, Modeling and Computing (IJITMC) 1, November (2018): 01–07. https://doi.org/10.5281/zenodo.1421496.

Full text

Abstract:

In the viewpoint of reliability implication and cost effectiveness of three phase inverter, there should be less device count in inverter topology and fewer losses in the semiconductor switches. The earlier reported less device count topology by many research groups are facing the problem of Total Harmonic Distortion (THD). The imperfect design value of DC link capacitor is the main reason of Harmonic Distortion (THD) problem. The ripple in the dc link voltages of Voltage Source Inverter (VSI) is leads to additional harmonics distortion. This paper present the simulative view of minimization of the harmonic reduction in proposed topology using improved DC link capacitor. The said approach is verified using PSIM (Power Simulator) software

APA, Harvard, Vancouver, ISO, and other styles

14

Tayab, U. B., and Humayun M. A. Al. "Modeling and Analysis of a Cascaded Battery-Boost Multilevel Inverter Using Different Switching Angle Arrangement Techniques." Engineering, Technology & Applied Science Research 7, no. 2 (2017): 1450–54. https://doi.org/10.5281/zenodo.571267.

Full text

Abstract:

Multilevel inverters have the capability to produce an AC staircase output waveform without using a bulky passive filter. Therefore, the multilevel inverters are gaining more and more popularity, among the different types of inverters, for photovoltaic applications in the modern era of technology. However, if the switching angle arrangement technique is not selected appropriately then the total harmonic distortion of the voltage output waveform may become undesirable. In this paper, Half-Equal-Phase, Feed-Forward and Selective Harmonics Elimination Pulse Width Modulation switching angle arrangement techniques at different power factors (i.e., 1.0, 0.75 and 0.50) are applied to a cascaded battery-boost inverter. PSIM software is used to evaluate and compare the performance of a 9-level cascaded battery-boost inverter with three switching angle arrangement techniques at power factors of 1.0, 0.75, and 0.50, respectively. Simulation results show that the Selective Harmonics Elimination Pulse Width Modulation technique can produce an output voltage and current waveform with the lowest total harmonic distortion. On the other hand, the output current waveform produced by power factor 0.50 had the lowest total harmonic distortion.

APA, Harvard, Vancouver, ISO, and other styles

15

Onal, Yasemin. "Analysis of a new SEPIC AC–DC PFC converter for light emitting diode applications." Emerging Materials Research 11, no. 1 (2022): 51–59. http://dx.doi.org/10.1680/jemmr.21.00061.

Full text

Abstract:

Active power factor correction (PFC) converters are used to increase the power factor and improve the total harmonic distortion as a result of reducing the harmonics in the current. In this paper, a new bridgeless single-ended primary inductor converter (SEPIC) topology used in light emitting diode (LED) load is proposed to obtain near-unity power factor. By eliminating the input bridge in the bridge PFC converter, the total harmonics distortion is improved and a lower cost is obtained. The reactive power control is used to generate the reference current signal in the proposed converter to control the LED current. To demonstrate the applicability of the proposed topology and to compare its performance with the bridge SEPIC topology, PSIM circuit simulation was used, and an experimental prototype was performed. In the experimental study, 25 Vrms input voltage was applied, and 10 V DC voltage was obtained at the output. Using the proposed converter, the total harmonic distortion value was reduced from 5.722% to 1.837%, and the power factor was increased to 0.999. The experimental and simulation results showed that the total harmonic distortion value of the input current improved and that the proposed SEPIC PFC converter for low-power circuits, particularly in LED applications, is a very good option.

APA, Harvard, Vancouver, ISO, and other styles

16

Bonilla, Axel Rivas, and Ha Thu Le. "Analysis and Mitigation of Harmonics for a Wastewater Treatment Plant Electrical System." WSEAS TRANSACTIONS ON CIRCUITS AND SYSTEMS 23 (February 9, 2024): 1–13. http://dx.doi.org/10.37394/23201.2024.23.1.

Full text

Abstract:

Power quality has become a pressing issue that demands solutions as power electronic equipment has been increasingly used in industrial sectors. One critical problem is how to mitigate harmful harmonics generated by the power electronic equipment. This study investigates harmonic distortion issues in a wastewater treatment plant to verify compliance with IEEE standard 519 using simulation software ETAP and realistic data from the plant. Harmonic quantification shows that the plant harmonic situation violates IEEE Standard 519 where harmonic levels exceed its voltage and current limits. Different methods were used to mitigate the harmonic situation where the core is using passive harmonic filters. It is found that the biggest contributor to the harmonic distortion is the system variable frequency drives. Using high-pulse variable frequency drives, such as 18-pulse, is proven to be beneficial for harmonic reduction. Further, installing passive harmonic filters in appropriate locations helps lower voltage and current harmonics to meet IEEE Std. 519 limits. However, adding a passive harmonic filter higher up the power distribution or adding passive filters to the feeder buses is not effective in lowering the Total Harmonic Distortion (THD) of the system. This would have the drawback of increasing the rating of the system bus voltages. Other findings include a lack of medium voltage passive filters on the market and high costs. The study contributes some insight understanding, experience, and methods for engineers when developing solutions for controlling harmonics in similar plants or industrial applications.

APA, Harvard, Vancouver, ISO, and other styles

17

Braide, S. L. "Evaluation and Analysis of Harmonic Distortion on 330kV Network Case Study Selected Sub-Region Nigerian Power System for Improve Power Quality." Journal of Progress in Engineering and Physical Science 1, no. 1 (2022): 13–22. http://dx.doi.org/10.56397/jpeps.2022.11.03.

Full text

Abstract:

This paper presented fundamental characteristics of harmonic studies and its related work. The total harmonic distortion (THD) of the transmission line were computed using harmonics contents parameters of the waveform (harmonic voltage and impedance magnitude values). Results of THD for the 330kV transmission line are presented using harmonic load flow analysis in ETAP—domain on the view to measure the level of distortion in the network. Figure 2 shows the section of the harmonic load flow simulation in order to check for degree of harmonic distortion in the system under investigation. The provision of the harmonic frequency with greater magnitude exceeding THD and IHD limits are violated in accordance to IEC 61000-3-6:2008 (European Standards) are used as benchmark for measurement. That is the distortion for current and voltage (THDi% and THD%) are 0.5 and 1.5 respectively particularly harmonic order (h) ≤ 13. Consequently, the harmonic frequency violations with greater magnitude of 5th, 7th, 11th, and 13th order in the network are mitigated with 3-unit of single tuned filter to the affected buses for improved power quality.

APA, Harvard, Vancouver, ISO, and other styles

18

Tayab, U. B., and M. A. Al Humayun. "Modeling and Analysis of a Cascaded Battery-Boost Multilevel Inverter Using Different Switching Angle Arrangement Techniques." Engineering, Technology & Applied Science Research 7, no. 2 (2017): 1450–54. http://dx.doi.org/10.48084/etasr.1094.

Full text

Abstract:

Multilevel inverters have the capability to produce an AC staircase output waveform without using a bulky passive filter. Therefore, the multilevel inverters are gaining more and more popularity, among the different types of inverters, for photovoltaic applications in the modern era of technology. However, if the switching angle arrangement technique is not selected appropriately then the total harmonic distortion of the voltage output waveform may become undesirable. In this paper, Half-Equal-Phase, Feed-Forward and Selective Harmonics Elimination Pulse Width Modulation switching angle arrangement techniques at different power factors (i.e., 1.0, 0.75 and 0.50) are applied to a cascaded battery-boost inverter. PSIM software is used to evaluate and compare the performance of a 9-level cascaded battery-boost inverter with three switching angle arrangement techniques at power factors of 1.0, 0.75, and 0.50, respectively. Simulation results show that the Selective Harmonics Elimination Pulse Width Modulation technique can produce an output voltage and current waveform with the lowest total harmonic distortion. On the other hand, the output current waveform produced by power factor 0.50 had the lowest total harmonic distortion.

APA, Harvard, Vancouver, ISO, and other styles

19

Kishore, B., Senbakaraj, Periyasamy, and Poongkabilan. "THD Reduction in Multi-Level Inverters based on Multicarrier Pulse Width Modulation Technique." International Journal of Engineering and Advanced Technology (IJEAT) 9, no. 4 (2020): 1970–77. https://doi.org/10.35940/ijeat.D8994.049420.

Full text

Abstract:

Due to the advent of technology, electronic equipments are much more sensitive to harmonic and its analysis play an important role whereby reducing the distortion due to harmonics needs attention. To meet the requirements of the industries, harmonic free-high rating power sources are in high demand. Total Harmonic Distortion (THD) is an indicator of AC voltage source quality. In case of inverters, one such way to reduce THD would be the use of Pulse Width Modulation (PWM). The existing methods mainly use the low frequency pulse width modulation techniques for the switching. Control methods employing high frequency switching techniques held in controlling THD with proper application of filters. This paper analyses THD in multilevel inverters using multicarrier PWM technique with five pulse width modulation technique through MATLAB simulations. Finally, a comparison is done to find the less harmonic generated PWM method using fewer filters

APA, Harvard, Vancouver, ISO, and other styles

20

Adjie, Alfin Prima, and Muhammad Imran Hamid. "Harmonics Analysis of Input Current of 3-Phase PWM Rectifier." Andalas Journal of Electrical and Electronic Engineering Technology 1, no. 1 (2021): 31–40. http://dx.doi.org/10.25077/ajeeet.v1i1.6.

Full text

Abstract:

Rectifier is a non-linier load that causes harmonic distortion in the power system. Pulse-width modulation (PWM) method is an effective method in pressing the magnitude of harmonics in a rectifier application, it provides an almost sinusoidal input current. However, the variation of loads that supplied by a rectifier cause the harmonics that arise can still beyond the applicable standard. The amount of harmonics in the operating range of a rectifier need to be identified to determine the filter on the input side. In this research article, 3-phase PWM rectifier was designed with hysteresis current control technique using PSCAD software simulation. Harmonic compensation was carried out by applying an active filter based on P-Q theory to reduce the harmonic distortion that occurs in the input current, thus giving a low total harmonic distortion (THD) value. Based on the simulation, 3-phase PWM rectifier operation starting at a power level of 150 kW, giving a THD value above 5-10% by the increasing the amount of load supplied by the rectifier. The application of active filter based on the P-Q theory is able to compensate harmonics in the input current wave with a THD value below 5% in the rectifier operating range.

APA, Harvard, Vancouver, ISO, and other styles

21

Widagdo, Reza Sarwo, Puji Slamet Slamet, and Cahyo Pangestu. "Analysis of the Effectiveness of Using Active Filters and Passive Filters in Reducing Harmonics Using a Power Simulator (PSIM) at PT. Delta Jaya Mas." Wahana 76, no. 2 (2024): 8–28. https://doi.org/10.36456/wahana.v76i2.9283.

Full text

Abstract:

The Extruder Machine at PT. Delta Jaya Mas plays a critical role in the production of rubber and PVC hoses, as well as molded rubber products. This process involves the use of a 3-phase synchronous motor and Variable Frequency Drive (VFD), which can introduce harmonics into the electrical system due to their non-linear load. These harmonics can cause waveform distortion, leading to decreased efficiency and potential equipment damage. To overcome this issue, a comprehensive research is being conducted utilizing the Power Simulator (PSIM) program to analyze the impact of harmonics and evaluate the effectiveness of both active and passive filters in reducing these unwanted distortions. Initial assessments of the Extruder SDP panel revealed elevated levels of Total Harmonic Distortion (THD) in the current phases, while the voltage phases remained within acceptable thresholds. Simulation results demonstrated that the active filter was able to significantly reduce THD to an impressive 1.57%, showcasing its effectiveness in harmonic mitigation. On the other hand, the passive filter also proved beneficial, albeit to a slightly lesser extent, achieving a reduction in THD to 34.07%. This ongoing research not only aims to assist PT. Delta Jaya Mas in implementing appropriate harmonic reduction measures for their Extruder Machine but also seeks to advance the understanding of harmonic analysis and filter applications.

APA, Harvard, Vancouver, ISO, and other styles

22

Afif, Salim, I. W. Sukerayasa, and W. G. Ariastina. "Analisis Pengaruh Harmonisa terhadap Rugi-Rugi Daya pada Sistem Tegangan Rendah dan Transformator GR088 di Penyulang Menjangan." Jurnal SPEKTRUM 5, no. 2 (2018): 1. http://dx.doi.org/10.24843/spektrum.2018.v05.i02.p01.

Full text

Abstract:

Menjangan feeder is a medium-voltage network system which distributes electricity throughout Gilimanuk and some areas in Buleleng. It has 69 distribution substations, which one of them, substation GR088, contributes to the highest value of the total harmonic distortion (THDi). In this research, the effect of harmonic distortions on losses at low voltage system of substation GR088 will be evaluated.The method used in this study is direct measurement of harmonic distortions at each low-voltage costumer whose electricity is generated by substation GR088 at Menjangan Feeder. Software is also used to perform harmonic load flow analysis and simulations. The total value of losses on transformer and low voltage system of substation GR088 Menjangan feeder, in a no-harmonic condition is 1481,7 Watt. On under-harmonic condition, the total value of losses is 1552,5 Watt. Therefore there is a 70,8 Watt difference between the two conditions. At this case, beside the heat created by the harmonic distortion that can affect the performance of transformers, it also cause a quite great value of losses, which is 1,7 kWh per day, or approximately 620 kWh per year. It means the harmonic distortion in substation GR088 can cause PT PLN (Persero) lose Rp.910.018,8 per year.

APA, Harvard, Vancouver, ISO, and other styles

23

Natarajan, Suresh, and R. Samuel Rajesh. "Comparison Of Cascaded H-bridge Inverters for Harmonic Mitigation Considering Various Loads." International Journal of Power Electronics and Drive Systems (IJPEDS) 8, no. 1 (2017): 10. http://dx.doi.org/10.11591/ijpeds.v8.i1.pp10-19.

Full text

Abstract:

This paper compares the reduction of harmonics in various level cascaded H-bridge inverters. The switching angles for the cascaded H-bridge inverter were calculated by evolutionary optimization technique. Fourier analysis is used to determine the switching angles for the desired electrical parameters. Lower order harmonics such as third, fifth, seventh, ninth and eleventh order harmonics were taken into consideration to reduce the total harmonic distortion. Simulation was done for thirteen, fifteen and seventeen level cascaded H-bridge inverters using Matlab. Total harmonic distortion of voltage and current for R, RL and Motor load were analyzed.

APA, Harvard, Vancouver, ISO, and other styles

24

Hoo, Dick Sang, Kein Huat Chua, Yun Seng Lim, Boon Han Lim, Mohammad Babrdel Bonab, and Li Wang. "Mitigation of harmonic distortions in third rail electrical systems." International Journal of Power Electronics and Drive Systems (IJPEDS) 14, no. 1 (2023): 348. http://dx.doi.org/10.11591/ijpeds.v14.i1.pp348-357.

Full text

Abstract:

The extensive use of power electronic converters in the third rail system increases the harmonic distortions on the rail electrical feeding systems. Electrical machines and transformers could be overheated causing premature failures of the devices. It is therefore important to address the harmonic distortions on the electrical networks during real-time operation, which includes the degraded operation, not just the normal operation. In this paper, the harmonic distortions of a third rail system are investigated using electrical transient and analysis program (ETAP) simulation software. Four operating scenarios, namely the normal operation and three degraded operations, are considered in the studies. The degraded operations occur when one of the bulk supply transformers or 33 kV feeders is out of service. The findings of the studies showed that the 11th and 13th order harmonics are the dominant harmonic orders due to the use of 12-pulse rectifiers on the third rail system. Single-tuned harmonic filters are designed and placed in the 33 kV feeders to mitigate the individual voltage harmonic distortion (IHDv) and the total voltage harmonic distortion (THDv) so that it is within the statutory of IEEE 519:2014.

APA, Harvard, Vancouver, ISO, and other styles

25

Nömm, Jakob, Sarah Rönnberg, and Math Bollen. "An Analysis of Voltage Quality in a Nanogrid during Islanded Operation." Energies 12, no. 4 (2019): 614. http://dx.doi.org/10.3390/en12040614.

Full text

Abstract:

Voltage quality data has been collected in a single house nanogrid during 48 weeks of islanded operation and 54 weeks of grid-connected operation. The voltage quality data contains the voltage total harmonic distortion (THD), odd harmonics 3 to 11 and 15, even harmonics 4 to 8, voltage unbalance, short-term flicker severity (Pst) and long-term flicker severity (Plt) values, and voltage variations at timescales below 10 min. A comparison between islanded and grid-connected operation values was made, were some of the parameters were compared to relevant grid standard limits. It is shown that some parameters exceed the defined limits in the grid-standards during islanded operation. It was also found that the islanded operation has two modes of operation, one in which higher values of the short circuit impedance, individual harmonic impedance, harmonic voltage distortion and voltage unbalance were reached.

APA, Harvard, Vancouver, ISO, and other styles

26

Budi Aryawan, I. Putu, Antonius Ibi Weking, and I. Wayan Rinas. "ANALISIS PEMASANGAN FILTER PASIF DAN AKTIF TERHADAP KANDUNGAN HARMONISA DAN RUGI-RUGI DAYA GARDU DISTRIBUSI KA 2085 DI PT. PLN (Persero) DISTRIBUSI BALI RAYON MENGWI." Jurnal SPEKTRUM 5, no. 1 (2018): 41. http://dx.doi.org/10.24843/spektrum.2018.v05.i01.p06.

Full text

Abstract:

Operation of nonlinear loads can cause harmonic distortion in the voltage and current waveforms that result in abnormal electrical system condition. Content THD (Total Harmonics Distortion) an excess flow can cause power quality systems become worse, thus causing the system power factor is lower. Active filter and Passive filter which aims to reduce harmonics that arise. Analysis THD simulation and measurement results in accordance with IEEE 519-2014 and analysis designing of a passive filter and active filter is right to suppress harmonic distortion. The analysis shows that the installation of active filters causes the current and voltage THD contents to comply with the standard IEEE 519-2014 standards is ?12% and 5%. The use of passive and active filters can reduce THDi content to 8.45% and 3.07%, respectively. While for THDv decreased respectively to 3.68% and 3.45% which already meet the IEEE 519-2014 standards. Power losses decreased respectively to 4.36 kW and 3.86 kW. Installation of active filters is better for reducing THD (Total Harmonics Distortion) and power losses in KA 2085 transformers.

APA, Harvard, Vancouver, ISO, and other styles

27

Kangaji, Ladislas Mutunda, Lagouge Tartibu, and Pitshou N. Bokoro. "Modelling and Performance Analysis of a Tidal Current Turbine Connected to the Grid Using an Inductance (LCL) Filter." Energies 16, no. 16 (2023): 6090. http://dx.doi.org/10.3390/en16166090.

Full text

Abstract:

Nowadays, integrating renewable energy sources, such as tidal power, into the existing power grids of turbines is crucial for sustainable energy generation. However, tidal turbine energy transforms the potential energy of moving water into electrical energy. When both nonlinear load and dynamic load harmonics are present, the tide speed variance causes serious power quality issues such as low power factor, unstable voltage, harmonic distortions, frequency fluctuations, and voltage sags. The integration of an LCL-filter-based connection scheme can address these challenges by improving power quality and the overall performance of the tidal current turbine grid system. This study shifts LCL filter research from its conventional wind energy emphasis to the emerging field of tidal stream generation systems. The LCL filter analysed in this paper is modelled to exhibit adequate mechanical, electrical, and hydrodynamic characteristics. This model accounts for tidal current variations, turbine speed control, and power extraction dynamics. The LCL filter is evaluated for its effectiveness in reducing harmonic distortions, voltage fluctuations, and reactive power fluctuations. This system is composed of a 1.5 MW/C, a 1.2 MW three-level inverter with a nominal voltage of 600 V, and an inductance (LCL) filter. The results show that the inverter produces a harmonic distortion of less than 0.5%, which demonstrates the effectiveness of the filter in improving total harmonic distortion, reactive power consumption, and voltage control.

APA, Harvard, Vancouver, ISO, and other styles

28

Ali, Nurhalim Dani, Noveri Lysbetti M, Firdaus Firdaus, Rahyul Amri, and Edy Ervianto. "Passive Filter Design for Improving Quality of Solar Power." International Journal of Electrical, Energy and Power System Engineering 1, no. 1 (2018): 11–16. http://dx.doi.org/10.31258/ijeepse.1.1.11-16.

Full text

Abstract:

With the progress of industry, power electronic equipment is widely used in power system, it has produced serious harmonic distortion. It goes without saying that harmonic analysis is a very important subject in power system. The influence of harmonics dominant because it is permanent. This harmonic influence spread to energy systems, energy devices, and influential to the energy source. For that, it is necessary a tool that is able to overcome these problems so that the electric energy services are not compromised and the reliability was not reduced. This study how to harmonic analysis, total harmonic distortion, and identifying the inverter at a solar power plant 320WP in accordance with the IEEE 519-2014.

APA, Harvard, Vancouver, ISO, and other styles

29

Gyaang, Raymond, and Patrick Appiah. "Harmonic injection of domestic nonlinear loads in Ghana's power distribution system: analysis and mitigation using a low-cost notch filter." Journal of the Ghana Institution of Engineering (JGhIE) 23, no. 2 (2023): 25–33. http://dx.doi.org/10.56049/jghie.v23i2.81.

Full text

Abstract:

Due to global efforts to save energy, digital light processing (DLP) and direct view televisions (DVTVs) are being replaced by energy-efficient liquid crystal display (LCD) and light emitting diode (LED) televisions. However, these energy-efficient appliances cause harmonics to be injected into the power distribution system, posing a threat to power quality. This study investigates the harmonics generated by common domestic appliances, particularly LCD and LED TVs used in homes in Ghana. Field harmonic measurements were taken using a C.A. 8335 Power Quality Analyzer at a selected facility and were then replicated in a simulation using MATLAB/SIMULINK to model the facility's area network capacity of 100-kVA, 11kV/433V. The study proposes a notch filter as a harmonic mitigation technique, which is integrated into the simulation design and found to be effective at reducing total harmonic distortion current to 0.05 % when applied in parallel to nonlinear loads. The study also compares the harmonic distortion generated by LED TVs and LCD TVs, finding that both types generate high levels of distortion.

APA, Harvard, Vancouver, ISO, and other styles

30

Shrestha, Sulav, Sagar Poudel, and Sajesan Ghimire. "Design and Analysis of Single-Tuned Passive Filters for Total Harmonic Distortion (THD) Mitigation and Power Quality Enhancement." Journal of Engineering and Sciences 4, no. 1 (2025): 69–78. https://doi.org/10.3126/jes2.v4i1.76171.

Full text

Abstract:

Harmonic distortion caused by nonlinear loads is a significant challenge in power systems, often resulting in reduced efficiency, overheating, and equipment malfunction. Despite the availability of various mitigation techniques, many fail to offer a cost-effective and practical solution for distribution networks. This research addresses that gap by designing and analyzing a five-stage single-tuned passive filter (STPF) system to mitigate harmonics in a 400V, 50Hz distribution network. The main objective is to reduce Total Harmonic Distortion (THD) in voltage and current to meet IEEE 519-2022 standards. The proposed filter system targets the 5th, 7th, 9th, 11th, and 13th harmonic orders using a simulation model developed in MATLAB/Simulink. The system initially showed high THD levels of 16.06% in voltage and 17.57% in current. After applying the filters, the voltage THD was reduced to 3.89%, and the current THD dropped to 2.52%. These results confirm the effectiveness of STPFs in improving power quality under nonlinear loading conditions.

APA, Harvard, Vancouver, ISO, and other styles

31

Santoso, Satria Adji, and Agus Ulinuha. "Harmonic Distortion Analysis Of On-grid Photovoltaic Panel Integration In Load Sharing Scheme." ELKHA 17, no. 1 (2025): 77–83. https://doi.org/10.26418/elkha.v17i1.91311.

Full text

Abstract:

Harmonic analysis is crucial to maintain the system power quality, especially in photovoltaic panels with load sharing scheme. Previous studies have discussed the impact of harmonic distortion on electric power systems in general, but there is still limited discussion on on-grid photovoltaic panel systems without the load-sharing scheme. Harmonic is a distortion phenomenon of current and voltage that is higher than fundamental frequency. The consumption of nonlinear loads contributes to the rising of harmonic distortion that has a bad impact on the system's power quality. This study aims to analyze and compare the levels of harmonic distortion on on-grid photovoltaic panels with a load-sharing scheme and evaluate the suitability with the IEEE 519-2014 standard. The result of this study shows that the Total Harmonic Distortion (THD) on the current (THDi) in PLN’s load and network exceeds the limit that is stipulated in IEEE 519-2014. THD current in PLN’s loads and network is higher than the output current from the on-grid inverter because of the consumption of the nonlinear load. Meanwhile, Total Harmonic Distortion (THD) on the voltage (THDv) in the on-grid inverter, electric network, and load tends to be lower and still within the safe limit. This study is expected to support the implementation of an effective preventive strategy to reduce harmonic distortion on the performance of on-grid photovoltaic panels that will be optimum in the load-sharing scheme.

APA, Harvard, Vancouver, ISO, and other styles

32

Richard, Laurensius Richard Mulyadi, and Insani Abdi Bangsa. "STUDI ANALISA PERHITUNGAN NILAI HARMONIK TEGANGAN DAN ARUS PADA BUDDHA TZU CHI HOSPITAL." Aisyah Journal Of Informatics and Electrical Engineering (A.J.I.E.E) 5, no. 1 (2023): 30–38. http://dx.doi.org/10.30604/jti.v5i1.124.

Full text

Abstract:

ABSTRACT  The occurrence of harmonics is caused by the non-linear operation of the electrical load. The level of harmonic distortion or what is called Total Harmonic Distortion (THD) in a transformer can cause losses that affect the efficiency of the transformer. In this study, THD measurements were carried out on four transformers at Tzu Chi Hospital. This research was conducted using observation, documentation, and direct measurements in the field to analyze within the limits of the IEEE 519-2014 standard. The purpose of this study was to analyze the main electrical system at Tzu Chi Hospital, analyze the value of Total Harmonic Distortion (THD) for voltage analysis. and currents at Tzu Chi Hospital. THDv based on the measurement results are transformer 1 4.8%, transformer 2 2.48%, transformer 3 1.51%, transformer 5 5%. While the THDi results obtained after measurement are transformer 1 20.2%, transformer 2 29 ,4%, transformer 3 14.78%, transformer 5 37.8%. Even after measurement, THDv was found to conform to the IEEE 519-2014 standard, and THD was found to be non-compliant with the IEEE 519-2014 standard.  ABSTRAK  Timbulnya harmonik disebabkan oleh operasi beban listrik non-linier. Tingkat distorsi harmonik atau yang disebut dengan Total Harmonic Distortion (THD) pada suatu trafo dapat menimbulkan rugi-rugi yang mempengaruhi efisiensi trafo. Pada penelitian ini dilakukan pengukuran THD pada empat trafo di Rumah Sakit Tzu Chi. Penelitian ini dilakukan dengan metode observasi, dokumentasi, dan pengukuran langsung di lapangan untuk menganalisis kesesuaian dengan batasan standar IEEE 519 2014. Tujuan dari penelitian ini adalah untuk menganalisis sistem kelistrikan utama di Rumah Sakit Tzu Chi, menganalisa perhitungan nilai Total Harmonic Distortion (THD) untuk tegangan dan arus di Rumah Sakit Tzu Chi. THDv berdasarkan hasil pengukuran yaitu transformator 1 4,8%, transformator 2 2,48%, transformator 3 1,51%, transformator 5 5%.sedangkan THDi hasil yang didapat setelah dilakukan pengukuran adalah transformator 1 20,2%, transformator 2 29,4%, transformator 3 14,78%, transformator 5 37,8%. Bahkan setelah pengukuran, THDv diketahui sesuai dengan standar IEEE 519 2014, dan THDi diketahui tidak sesuai dengan standar IEEE 519 2014.

APA, Harvard, Vancouver, ISO, and other styles

33

Abdullah, Mohamed, and Salimin Suriana. "THD performance of single phase five level inverter using proportional resonant and harmonic compensators current controller." International Journal of Power Electronics and Drive System (IJPEDS) 11, no. 3 (2020): 1423–29. https://doi.org/10.11591/ijpeds.v11.i3.pp1423-1429.

Full text

Abstract:

This paper observe the total harmonic distortion (THD) performance of single phase five level inverter using proportional resonant (PR) and harmonic compensators current controller. The THD when adding PR current controller was 1.6% at first. After more functions were added to the PR current controller to reduce the THD at the 3rd, 5th and 7th harmonic orders, the THD of the 3rd harmonic order was reduced from 0.45% to 0.1% while the 5th and 7th harmonic orders were reduced from 0.6% and 0.43% to 0.25% and 0.4% respectively. The development and simulation is performed using Matlab/Simulink. The simulation result is performed by using Fast Fourier Transform analysis (FFT) for the harmonics captured.

APA, Harvard, Vancouver, ISO, and other styles

34

Manivel, Murugesan, Lakshmanan Palani, Sivaranjani Subramani, et al. "Performance analysis of fifteen level reduced device count asymmetrical multilevel inverter." International Journal of Power Electronics and Drive Systems (IJPEDS) 15, no. 4 (2024): 2243–52. https://doi.org/10.11591/ijpeds.v15.i4.pp2243-2252.

Full text

Abstract:

In this article, a fifteen-level reduced device count asymmetrical multilevel inverter is introduced for electric vehicle applications. This novel multilevel inverter topology minimizes the power switches required. Control of the proposed inverter is accomplished via the nearest-level control method. In a typical multilevel inverter, ten to twelve switches are used to create the fifteen levels. A high number of switches are used in traditional multilevel inverters, which increases the distortion from all harmonics, switching losses, cost, and cost per switch. Only nine switches are needed for the suggested architecture. It significantly minimizes the total harmonic distortion by 5% and lowers the switching losses, low-order harmonics, and complexity. The efficiency of the suggested multilevel inverter (MLI) is 98.35%.

APA, Harvard, Vancouver, ISO, and other styles

35

Khine, Zar Maw. "Design of Active Filter for Reducing Harmonic Distortion in Distribution Network." International Journal of Trend in Scientific Research and Development 3, no. 5 (2019): 1461–66. https://doi.org/10.5281/zenodo.3590927.

Full text

Abstract:

Power transmission and distribution systems are designed for operation with sinusoidal voltage and current waveform in constant frequency. Power electronic control devices due to their inherent non linearity draw harmonic and reactive power form the supply mains. The wide use power electronic equipment with linear load causes an increasing harmonics distortion in the ac mains currents. Harmonics component is a very serious and harmful problem in the distribution system. The main adverse effects of harmonic current and voltage on power system equipment are overheating, overloading, perturbation of sensitive control and electronic equipment, capacitor failure, communication interferences, process problem, motor vibration, resonances problem and low power factor. This paper describes the modelling of active filter with synchronous d q reference frame theory for harmonic compensation in distribution systems. The case study is carried out at Hlaingtharyar township distribution system. The model is implemented for harmonic analysis from simulation using a Matlab Simulink with the THD values obtained by practical measurement. Khine Zar Maw "Design of Active Filter for Reducing Harmonic Distortion in Distribution Network" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5 , August 2019, URL: https://www.ijtsrd.com/papers/ijtsrd26663.pdf

APA, Harvard, Vancouver, ISO, and other styles

36

Dolgikh, N. N., D. S. Osipov, A. O. Shepelev, and E. Yu Shepeleva. "Analysis of non-sinusoidal modes of operation of electrical equipment in power supply systems with semiconductor converters." Вестник Северо-Кавказского федерального университета, no. 3 (102) (2024): 7–17. http://dx.doi.org/10.37493/2307-907x.2024.3.1.

Full text

Abstract:

Introduction. With the increasing number of electrical loads with non-linear volt-ampere characteristic, there are problems with distortion of the shape of the supply voltage and current curve. These distortions can lead to undesirable effects such as network overload, harmonic distortion, unacceptable voltage and current ripple, etc. Goal. To investigate non-sinusoidal modes of operation of electrical equipment in the power supply system to predict the quality of electrical energy and develop measures to ensure electromagnetic compatibility of electrical equipment in power supply systems. Materials and methods. The simulation model developed in MATLAB/Simulink software complex allows to analyze the operation of the power supply system with semiconductor converters under different conditions and predict its behaviour under different loads and external influences. Results and discussion. In the course of work it was found that in the absence of reactive power compensation devices, the levels of the total coefficient of higher harmonic components of voltage KU(n), in the power supply system with 12-pulse converter exceed the permissible values during 95% of the measurement interval time in accordance with GOST 32144-2013 (in the connection points of 6 kV). The values of the coefficient of the n-th harmonic component of voltage at 11, 13, 23, 25, 35 37 harmonics in some cases exceed the permissible values during 100% of the measurement interval time. When using compensation means (batteries of static capacitors, resonant filter), the values of the total coefficients of voltage harmonic components do not exceed the permissible values. Conclusion. According to the results of the study, it is clear that the widespread use of rectifier devices leads to a significant distortion of the voltage curve. However, it should be noted that the existing GOST regulates only the value of harmonic components of voltage and does not take into account the harmonic components of current, which in turn also have a detrimental effect on the elements of the electrical network.

APA, Harvard, Vancouver, ISO, and other styles

37

Ashajyothi, P., V. Bhasvitha, Harish Balakumar, P. V. Manitha, and Anjana Jain. "Power Quality Improvement in 3-Phase Power System Using Artificial Neural Network Based Hybrid Filter." Journal of Computational and Theoretical Nanoscience 17, no. 1 (2020): 396–401. http://dx.doi.org/10.1166/jctn.2020.8681.

Full text

Abstract:

Harmonic-distortion is a serious problem in power systems involving linear and non-linear loads. Adding a passive-filter to the system is the most popular choice to reduce issues due to harmonic distortion. Passive-filter cannot eliminate all the harmonic components. A hybrid-filter, in which shunt active filter is serially integrated with shunt passive filter can provide better solution to the problems causing due to harmonic distortions. The paper proposes a hybrid filter with Artificial Neural Network (ANN) based control scheme. A detailed study is done by developing a Simulink model for the proposed. Here in this paper, % Total-Harmonic-Distortion (THD) of compensated load-current is referred as a performance measure of the system. Also, a controller based on ANN is fabricated for the proposed scheme and through analysis in depth is carried out, this controller performance is found comparatively satisfactory.

APA, Harvard, Vancouver, ISO, and other styles

38

Mohd Wazir, Muhammad Haziq, Dalila Mat Said, Zaris Izzati Mohd Yassin, and Siti Aisyah Abd Wahid. "Hotspot temperature analysis of distribution transformer under unbalanced harmonic loads using finite element method." International Journal of Electrical and Computer Engineering (IJECE) 14, no. 2 (2024): 1287. http://dx.doi.org/10.11591/ijece.v14i2.pp1287-1298.

Full text

Abstract:

In an electrical power distribution system, harmonic distortion is the most prominent power quality problem that causes long-term adverse effects such as failure of distribution transformers. Considering that most transformer problems are caused by heat losses due to the presence of harmonics, it was decided to use a numerical method with the highest accuracy, finite element method (FEM) to analyze the hot spot temperature (HST) of the thermal distribution transformer model. Through the use of COMSOL Multiphysics software, three phases of unbalanced harmonic loads are considered, which contribute to three different total harmonic distortion current (THDI) levels and five different insulation temperature classes. Using the IEEE C57.110-2018 guidance, the simulation outputs are then verified with HST results from the HST mathematical model. The findings indicated that with the increased loadings, the unbalanced harmonic currents have impacted the HST increment and distinguished the HST values between the phases.

APA, Harvard, Vancouver, ISO, and other styles

39

Wazir, Muhammad Haziq Mohd, Dalila Mat Said, Zaris Izzati Mohd Yassin, and Siti Aisyah Abd Wahid. "Hotspot temperature analysis of distribution transformer under unbalanced harmonic loads using finite element method." International Journal of Electrical and Computer Engineering (IJECE) 14, no. 2 (2024): 1287–98. https://doi.org/10.11591/ijece.v14i2.pp1287-1298.

Full text

Abstract:

In an electrical power distribution system, harmonic distortion is the most prominent power quality problem that causes long-term adverse effects such as failure of distribution transformers. Considering that most transformer problems are caused by heat losses due to the presence of harmonics, it was decided to use a numerical method with the highest accuracy, finite element method (FEM) to analyze the hot spot temperature (HST) of the thermal distribution transformer model. Through the use of COMSOL Multiphysics software, three phases of unbalanced harmonic loads are considered, which contribute to three different total harmonic distortion current (THDI) levels and five different insulation temperature classes. Using the IEEE C57.1102018 guidance, the simulation outputs are then verified with HST results from the HST mathematical model. The findings indicated that with the increased loadings, the unbalanced harmonic currents have impacted the HST increment and distinguished the HST values between the phases.

APA, Harvard, Vancouver, ISO, and other styles

40

Milovanovic, Milos J., Svetlana S. Raicevic, Dardan O. Klimenta, Nebojsa B. Raicevic, and Bojan D. Perovic. "Determination of Optimal Locations and Parameters of Passive Harmonic Filters in Unbalanced Systems Using the Multiobjective Genetic Algorithm." Elektronika ir Elektrotechnika 30, no. 2 (2024): 28–37. http://dx.doi.org/10.5755/j02.eie.36124.

Full text

Abstract:

This paper discusses the problem of optimal placement and sizing of passive harmonic filters to mitigate harmonics in unbalanced distribution systems. The problem is formulated as a nonlinear multiobjective optimisation problem and solved using the multiobjective genetic algorithm. The performance of the proposed algorithm is tested on unbalanced IEEE 13- and 37-bus three-phase systems. The optimal solutions are obtained based on the following objective functions: 1) minimisation of total harmonic distortion in voltage, 2) minimisation of costs of filters, 3) minimisation of voltage unbalances, and 4) a simultaneous minimisation of total harmonic distortion in voltage, costs of filters, and voltage unbalances. Finally, an analysis of the influence of uncertainties of load powers and changes in system frequency and filter parameters on filter efficiency was performed.

APA, Harvard, Vancouver, ISO, and other styles

41

Maksimov, Anton, and Anatoliy Kubitsky. "RESEARCH DEPENDENCE TOTAL HARMONIC DISTORTION FROM FREQUENCY IN AMPLIFIERS WITH DIFFERENT TYPES AND DEPTHS OF NEGATIVE FEEDBACK." SYNCHROINFO JOURNAL 9, no. 2 (2023): 30–36. http://dx.doi.org/10.36724/2664-066x-2023-9-2-30-36.

Full text

Abstract:

In work examined one of the methods obtaining the dependence of the harmonic distortion from frequency in audio power amplifier for computer circuit simulation was investigated. This made it possible to assess for the first time the influence of both the form and the depth of the negative feedback on the dependence total harmonic distortion from frequency and to reveal the conditions under which an increase in the depth of the negative feedback leads to an increase in the harmonic coefficient. The study does not show the effect of each individual cascade on the dependence of the harmonic coefficient on frequency. The study was carried out at voltage gain (GV) equal to 60, 50, 40, 30 and 20 decibels, where GV =60dB corresponds to the minimum negative feedback (NF) depth, and GV =20dB to the maximum NF depth. To obtain the dependence total harmonic distortion (THD) factor THD=F(f) in the MicroCap11 simulation program, Harmonic Distortion analysis was used.

APA, Harvard, Vancouver, ISO, and other styles

42

H. Jopri, M., A. R. Abdullah, M. Manap, T. Sutikno, and M. R. Ab Ghani. "Harmonic Contribution Analysis of Electric Arc Furnace by Using Spectrogram." Bulletin of Electrical Engineering and Informatics 7, no. 2 (2018): 236–43. http://dx.doi.org/10.11591/eei.v7i2.1187.

Full text

Abstract:

In this paper, spectrogram, a fast and accurate technique is introduced for the analysis of the contribution. Based on a rule-based classifier and the threshold settings that referred to the IEEE Standard 1159 2009, the analysis of the harmonic and interharmonic contribution of EAF are carried out successfully. Moreover, the impact of contribution is measured using total harmonic distortion (THD) and total non-harmonic distortion (TnHD). In addition, spectrogram also gives 100 percent correct detection and able to analyze the contribution impact. It is proven that the proposed method is accurate, fast and cost efficient for analyzing the impact of harmonic and interharmonic of EAF.

APA, Harvard, Vancouver, ISO, and other styles

43

M., H. Jopri, R. Abdullah A., Manap M., Sutikno T., and R. Ab. Ghani M. "Harmonic Contribution Analysis of Electric Arc Furnace by Using Spectrogram." Bulletin of Electrical Engineering and Informatics 7, no. 2 (2018): 236–43. https://doi.org/10.11591/eei.v7i2.1187.

Full text

Abstract:

In this paper, spectrogram, a fast and accurate technique is introduced for the analysis of the contribution. Based on a rule-based classifier and the threshold settings that referred to the IEEE Standard 1159 2009, the analysis of the harmonic and interharmonic contribution of EAF are carried out successfully. Moreover, the impact of contribution is measured using total harmonic distortion (THD) and total non-harmonic distortion (TnHD). In addition, spectrogram also gives 100 percent correct detection and able to analyze the contribution impact. It is proven that the proposed method is accurate, fast and cost efficient for analyzing the impact of harmonic and interharmonic of EAF.

APA, Harvard, Vancouver, ISO, and other styles

44

Sadiq, Muhammad Arslan, Dr Nusrat Husain, Fawad Shaukat, et al. "Prominence of Filtering Techniques for Harmonics Mitigation in Advanced Power Electronics Systems." Vol 4 Issue 2 4, no. 2 (2022): 512–25. http://dx.doi.org/10.33411/ijist/2022040220.

Full text

Abstract:

With the advancement in technology, non-linear loads, continue to increase, and the enigma of harmonics is getting more and more serious. The huge addition of electronic loads in power systems has formed the problem of harmonic generation that has resulted in many associated drawbacks. This paper aims to analyze the harmonics in advanced power electronics-based systems and describes a solution to mitigate them through two distinguished filtering techniques. A rigorous analysis is done concerning the generation of harmonic distortion through different types of loads and harmonic mitigation by employing passive and active power filters. The active power (adaptive) filtering method mitigates all sorts of undesirable frequency components using artificial intelligence (AI) based algorithms by calculating the weight of the fundamental component and generating a harmonics replica to subtract it from the original periodic wave. The simulations that were done show that the indicated techniques can mitigate undesirable harmonics and can lower the total harmonic distortion (THD) effectively according to the statutory limit of the IEEE 519-2014 standard, thus lowering the associated drawbacks of harmonic generation in advanced power electronics systems.

APA, Harvard, Vancouver, ISO, and other styles

45

Zygarlicki, Jarosław, and Janusz Mroczka. "Method of testing and correcting signal amplifiers’ transfer function using prony analysis." Metrology and Measurement Systems 19, no. 3 (2012): 489–98. http://dx.doi.org/10.2478/v10178-012-0042-7.

Full text

Abstract:

Abstract This article presents a way of analyzing the transfer function of electronic signal amplifiers. It also describes the possibility of using signal precorrection which improves the parasitic harmonics in the THD (Total Harmonic Distortion) of the amplified signal by correcting linearity of the tested amplifier’s transfer function. The proposed method of analyzing and presenting the transfer function allows to diagnose the causes of generating parasitic harmonics, what makes it a useful tool when designing low distortion amplifier systems, such as e.g. amplifiers in measurement systems. The presented THD correction can be used in e.g. amplifier systems that cooperate with arbitrary generators.

APA, Harvard, Vancouver, ISO, and other styles

46

Vijayalakshmi, V. J., C. S. Ravichandran, and A. Amudha. "Predetermination of Higher Order Harmonics by Dual Phase Analysis." Applied Mechanics and Materials 573 (June 2014): 13–18. http://dx.doi.org/10.4028/www.scientific.net/amm.573.13.

Full text

Abstract:

Previous research was mainly concentrated on eliminating the selected lower order harmonics depending on the level of inverter which was assumed to be high. The harmonics may be present even in the higher order also. The analysis of harmonic spectrum by Finite Fourier Transform yields a very accurate result for lower order harmonics. For obtaining accurate Total Harmonic Distortion (THD) value and the harmonic spectrum, inclusion of higher order harmonics is essential. The method for accurate estimation is proposed in this paper. In normal practice, the higher order harmonics present in the output of the inverter are suppressed by using filters. In order to obtain more optimized higher order harmonics, it is necessary to obtain an accurate assessment of the higher order spectrum. The higher order spectrum is predetermined by proposed technique termed as Dual Phase Analysis (DPA) so as to obtain more optimized switching angles with the application of any Optimization Technique. This is an effective tool to analyze the various higher order components of the harmonic spectrum.

APA, Harvard, Vancouver, ISO, and other styles

47

Rouhollah, Mahmoud, and Amin. "Harmonic Improvement of Multilevel Inverter with Asymmetric Switching Modes and Harmonic Search Optimization Method." Tobacco Regulatory Science (TRS) 8, no. 1 (2022): 3971–89. https://doi.org/10.5281/zenodo.7581680.

Full text

Abstract:

This paper deals with the harmonic analysis of multi-level converters and harmonic reduction methods. The proposed method for multilevel converter aims to provide a suitable model in an asymmetric switching mode and extract the analytical relationships for output harmonics. In the end, the harmony search optimization method is used to obtain the optimized output voltage harmonics in asymmetric switching mode. The proposed structure for the 5-level asymmetric inverter is presented using the results of the proposed model as well as the optimized harmony. Simulations are performed in Matlab 2018a software and the results show the total harmonic distortion (THD) reduction by about 17% and 28% for the proposed inverter.

APA, Harvard, Vancouver, ISO, and other styles

48

Vaishnavi, Mantri, and Shinde Sanjay. "Power Quality Assessment of Tribrid System." Journal of Recent Trends in Electrical Power System 4, no. 3 (2021): 1–9. https://doi.org/10.5281/zenodo.5597221.

Full text

Abstract:

A reduction in the efficiency of any electrical system or equipment is because of power quality issues. In power quality issues the main term is harmonics which creates major problems in any equipment or system. So it is important to check and take an assessment of the system or equipment from time to time. This paper aims to determine the harmonics present in the Solar PV-Wind-Diesel Tribrid system. This system is located at the Government College of Engineering, Aurangabad. Modeling and simulation of this Tribrid system is done through MATLAB/Simulink software. Total harmonic distortion is calculated using the FFT analysis tool in MATLAB/Simulink software for different loads and with filter and without filter system. Results of Total Harmonic Distortion are compared for all types of combinations.

APA, Harvard, Vancouver, ISO, and other styles

49

Widagdo, Reza Sarwo, Kukuh Setyadjit, and Izzah Aula Wardah. "Analysis and Mitigation of Harmonics Distortion with Optimization Capacitor Banks and Single-Tuned Passive Filters." Jambura Journal of Electrical and Electronics Engineering 5, no. 2 (2023): 204–9. http://dx.doi.org/10.37905/jjeee.v5i2.19016.

Full text

Abstract:

Electrical system power supplies always require a completely sinusoidal voltage signal. But for a variety of reasons, utilities often struggle to maintain these desired conditions. Deviations of voltage and current waveforms from a sinusoidal form are called harmonic distortions. Harmonic distortions in power networks are increasing due to the widespread use of non-linear loads. In this article we will analysis at a single-tuned passive filter and optimization using a capacitor bank. Load-current analysis determines the efficiency of the filter application by calculating the load bus voltage and total harmonic distortion (THD). To simulate the work, the Electrical Transient Analyzer Program (ETAP) software was used. This system was created specifically for this simulation and does not represent a real system. This model tests the effects of injecting harmonic currents into a power grid through a variable speed drive (VFD). The filter is attenuated with a capacitor bank.

APA, Harvard, Vancouver, ISO, and other styles

50

Pérez López, Jaime Efraín, Franklin Hernán Vásquez Teneda, and Carlos Iván Quinatoa Caiza. "Diagnosis of the power quality in the welding warehouse of the company CIAUTO Cia. Ltda." REVISTA ODIGOS 4, no. 3 (2023): 9–29. http://dx.doi.org/10.35290/ro.v4n3.2023.953.

Full text

Abstract:

In this article a diagnosis of the power quality in the welding hall of the company CIAUTO Cía. Ltda. is carried out, following the Ecuadorian regulation No. ARCERNNR - 002/20. The electrical parameters are recorded with the FLUKE 435-II and analyzed according to the quality of the product and the consumer. The results reveal that the power factor is below 0.92, indicating inefficient use of electrical energy. In the evaluation of the quality of the product, it is observed that the voltage remains within the established limits, although it decreases considerably during working hours, on the other hand, the Flicker does not meet the standard, also the individual harmonic distortion specifically in the fifth harmonic 20% of variables recorded exceed 5%, unlike the total harmonic voltage distortion (THD) that meets the regulation. Likewise, an analysis of the quality in relation to the consumer is performed, revealing alarming levels of current consumption that exceed the nominal levels of the 800 kVA transformer at 325 A, also 90% of individual current harmonics greatly exceed the limits and the total demand distortion (TDD) has records of harmonics up to 80.04%. Finally, it is determined that the power quality in the welding hall of CIAUTO Cía. Ltda. presents deficiencies in power factor, Flicker and harmonic distortion. These results highlight the need to take measures to improve energy efficiency and ensure power quality for both the product and the consumer.

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Total Harmonic Distortion Analysis'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles