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Journal articles on the topic 'Harmonic'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

AKBAR, ANDIKA MUHAMMAD, and CANDRA FEBRI NUGRAHA. "Analisis Harmonik dan Perbaikan Nilai THD Arus dengan Perancangan Filter Pasif Single-Tuned." ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika 12, no. 4 (2024): 892. https://doi.org/10.26760/elkomika.v12i4.892.

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ABSTRAKSistem elektrifikasi kereta rel listrik (KRL) Jogja-Solo mempunyai tegangan nominal 1.500 Volt DC yang disuplai dari PLN 20 kV AC melalui gardu traksi untuk mengonversinya dengan komponen silicon rectifier yang bersifat sebagai beban non-linier. Beban tersebut menyebabkan harmonik, karena memiliki karakteristik menyuntikkan arus balik menuju sumber sehingga dapat menimbulkan distorsi pada gelombang arus. Penelitian ini bertujuan menganalisis harmonik dan memperbaiki nilai THD arus dengan merancang filter pasif untuk mereduksi gangguan tersebut pada panel outgoing RTR cubicle switchgear

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2

Xu, Yamei, Qiang Miao, Pin Zeng, Zhichen Lin, Yiyang Li, and Xinmin Li. "Multiple Synchronous Rotating Frame Transformation-Based 12th Current Harmonic Suppression Method for an IPMSM." World Electric Vehicle Journal 13, no. 10 (2022): 194. http://dx.doi.org/10.3390/wevj13100194.

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In order to solve the problem that the three-phase current of the interior permanent magnet synchronous motor (IPMSM) contains the 11th and 13th current harmonics, a multiple synchronous rotating frame transformation (MSRFT)-based current harmonic suppression method is established. Firstly, the influencing factors of current harmonics in IPMSM vector control are analyzed, and the influence mechanism of the inverter’s dead-time effect and the permanent magnet flux linkage harmonics on the current harmonics is described. Secondly, a simple current harmonic extraction method is proposed by optimi

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3

Zhou, Xue Song, Guang Zhu Chen, and You Jie Ma. "A Survey on Detecting Methods for Harmonic of Power System." Advanced Materials Research 614-615 (December 2012): 907–10. http://dx.doi.org/10.4028/www.scientific.net/amr.614-615.907.

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This paper describes Detecting Methods for Harmonics of power system has been considered one of the serious harms for power system. The research of harmonics has obtained high attention among people. The researches of harmonics detection have many methods, such as Based on Fryze theory of harmonic power detection, Instantaneous reactive power theory detection method, Fourier Transformation harmonic detection method, wavelet transform detection method, neural networks harmonic detection method etc. Aiming at harmonic detection, the different detection methods of power system harmonics are summa

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4

Gu, Xin, Bingzhi Zhang, Zhiqiang Wang, Xuefeng Jin, Guozheng Zhang, and Zhichen Lin. "Torque Ripple Suppression Strategy Based on Online Identification of Flux Linkage Harmonics." Electronics 14, no. 11 (2025): 2174. https://doi.org/10.3390/electronics14112174.

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Permanent magnet flux harmonics in Permanent Magnet Synchronous Motors (PMSMs) can cause torque ripple. Traditional torque ripple suppression methods based on analytical models are highly dependent on the accuracy of motor parameters, while existing flux harmonic identification techniques often suffer from limited precision, compromising the effectiveness of ripple suppression. This paper proposes an online flux harmonic identification method that considers the dead-time effect of inverters. A dead-time compensation algorithm is introduced to effectively mitigate current harmonics induced by i

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Gu, Xin, Yiyang Li, Wei Chen, and Xuefeng Jin. "Improved Deadbeat Predictive Control Based Current Harmonic Suppression Strategy for IPMSM." Energies 15, no. 11 (2022): 3943. http://dx.doi.org/10.3390/en15113943.

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When the interior permanent magnet synchronous motor (IPMSM) is running, there are abundant harmonics in the stator current. In order to achieve the suppression of current harmonics, the current harmonic extraction method and current harmonic controller are studied in this paper. Firstly, a simple and accurate method for extracting current harmonics is proposed by means of multiple synchronous rotating frame transformation (MSRFT). Secondly, an improved deadbeat predictive control (IDPC) based current harmonic controller is designed after analyzing the advantages and disadvantages of tradition

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6

Wang, Yuanyuan. "Research on Harmonic Suppression Methods." Highlights in Science, Engineering and Technology 87 (March 26, 2024): 138–42. http://dx.doi.org/10.54097/sq2cgn85.

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Harmonics can be very harmful to power electronic equipment. With the widespread use of modern electronic equipment, the generation of harmonics has become more common. These harmonics not only come from non-linear loads but can also be caused by faults or instability in the power system. Therefore, suppressing harmonics is crucial to maintaining the stability and normal operation of the power system. In recent years, experts have studied the harmonic problem, there are a large number of harmonic suppression methods, and the basic idea is divided into two, one is to transform the power electro

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7

Zhang, Shuang, Bei Tian, Jian Liang, and Yuanchu Cheng. "Detection of Harmonic Components using the FFT and Instantaneous Reactive Power Theory." Journal of Physics: Conference Series 2242, no. 1 (2022): 012034. http://dx.doi.org/10.1088/1742-6596/2242/1/012034.

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Abstract Harmonics is a widespread phenomenon in power system. With the rapid development of new energy generation, it is more urgent to monitor and suppress harmonics in power system. Considering the accuracy and real-time of harmonic detection, a novel harmonic detection method based on FFT and instantaneous reactive power theory is proposed. In this method, the harmonic frequency of the signal to be measured is first determined by windowed FFT, and then the harmonic amplitude and phase are calculated by an improved harmonic detection method based on instantaneous reactive power theory. The

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8

Gong, Chen Bin, Qing Hao Wang, Gang Chen, et al. "Research on Harm of Harmonics on Electrical Equipment." Advanced Materials Research 986-987 (July 2014): 1846–49. http://dx.doi.org/10.4028/www.scientific.net/amr.986-987.1846.

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Through the analysis of harmonics caused by transformer, capacitor, electromagnetic voltage transformer and other accident, harmonics is an important indicator of power quality, which has been included in the “pollution" of power grid is found. In order to understand the harmonic, this paper from the concept of quality of electric energy, and then gradually extended to the field of harmonics. This paper firstly introduces the various reasons and equipment may produce harmonic, Secondly, illustrate harm of harmonic to operation of transformers, capacitors, electromagnetic voltage transformers a

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9

Jiang, Peiyu, Zhanlong Zhang, Zijian Dong, and Yu Yang. "Vibration Measurement and Numerical Modeling Analysis of Transformer Windings and Iron Cores Based on Voltage and Current Harmonics." Machines 10, no. 9 (2022): 786. http://dx.doi.org/10.3390/machines10090786.

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The operating condition and structural state of the converter transformer are closely related to vibration. Abundant harmonics aggravate the vibration of windings and iron cores, resulting in frequent mechanical structural failures, which seriously affect the stable operation of the power system. Traditional research mainly focuses on the vibration of AC transformers without harmonics and there is no in-depth discussion of the vibration mechanism and the numerical calculation model of windings and iron cores under harmonics. In addition, the influence of harmonics, winding connection method an

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10

Han, Wei, Zikun Xu, Yueyao Zhu, Ming Chen, and Jingwei Zhang. "Control Strategy of Distributed Battery Energy Storage System with Harmonic Compensation." Journal of Physics: Conference Series 2584, no. 1 (2023): 012037. http://dx.doi.org/10.1088/1742-6596/2584/1/012037.

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Abstract Based on the distributed battery energy storage system (BESS), a grid-connection strategy considering harmonic restraint is investigated. It can compensate the harmonic current to the grid by measuring the grid harmonics, then harmonic compensation is implemented to reduce the total harmonic distortion (THD) of the grid current. In this paper, the method of measuring harmonics in the grid and the control principle of providing power supply and harmonic compensation based on BESS are described. On this basis, the control flow is designed. Firstly, the energy storage grid-connected syst

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11

Alhaj, Hussam M. M., Nursyarizal Mohd Nor, Vijanth S. Asirvadam, M. F. Abdullah, and T. Ibrahim. "Time Delay Measurement Compensation in Harmonic State Estimation." Applied Mechanics and Materials 699 (November 2014): 745–50. http://dx.doi.org/10.4028/www.scientific.net/amm.699.745.

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The proliferation of power electronics equipments generates harmonics distortion problem. Harmonics have many effects to the power system grid and the main limitation of harmonics is heating of power system devices. To monitor and mitigate the harmonics, the source location and the level of harmonics should be known. However, harmonic measurements are costly and is not practical to put harmonic measurement in each location in the grid. Hence, harmonic state estimation is needed. The most common method in harmonic state estimation is singular value decomposition (SVD). A time delay of the measu

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Gouda, O. E., G. M. Amer, and W. A. A. Salem. "A Study of K- Factor Power Transformer Characteristics by Modeling Simulation." Engineering, Technology & Applied Science Research 1, no. 5 (2011): 114–20. http://dx.doi.org/10.48084/etasr.59.

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Harmonic currents generated by nonlinear loads can cause overheating and premature failure in power transformers. K-factor transformers are specially designed to accommodate harmonic currents and offer protection against overheating caused by harmonics. They minimize harmonic current loss and have an additional thermal capacity of known limits. According to IEEE C57-110, the winding eddy current losses are considered proportional to the harmonic current squared times its harmonic number. K-factor is only an indicative value and the authors' main objective in this paper is to study the effect o

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13

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.

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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. Differe

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14

Qiu, Hongbo, Wenfei Yu, Yonghui Li, and Cunxiang Yang. "Research on the influence of driving harmonic on electromagnetic field and temperature field of permanent magnet synchronous motor." Archives of Electrical Engineering 66, no. 2 (2017): 295–312. http://dx.doi.org/10.1515/aee-2017-0022.

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AbstractAt present, the drivers with different control methods are used in most of permanent magnet synchronous motors (PMSM). A current outputted by a driver contains a large number of harmonics that will cause the PMSM torque ripple, winding heating and rotor temperature rise too large and so on. In this paper, in order to determine the influence of the current harmonics on the motor performance, different harmonic currents were injected into the motor armature. Firstly, in order to study the influence of the current harmonic on the motor magnetic field, a novel decoupling method of the moto

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15

Alashaary, Haitham Ali, Ghadeer Nyazi Al Shaba'an, Wael Fawzi Abu Shehab, and Shehab Abdulwadood Ali. "Estimation of harmonic impedance and resonance in power systems." International Journal of Electrical and Computer Engineering (IJECE) 15, no. 1 (2025): 67. http://dx.doi.org/10.11591/ijece.v15i1.pp67-75.

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Since power systems are designed to work at the fundamental frequency, the presence of other frequencies from various sources may induce series and parallel resonances, leading to damage. The behavior of the power system in the presence of harmonics becomes evident with knowledge of harmonic impedance. Measurement offers the most accurate means of estimating harmonic impedance. However, when precise data of the power system parameters are available, highly satisfactory results can be achieved through calculation methods, particularly regarding loads, which are unknown and always change. This p

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16

Jayababu, Badugu, Reddy G. Nageswara, and Vimala Kumar Kurakula. "Dynamic harmonic domain approach to assess performance of three-phase fixed capacitor thyristor controlled reactor (FC-TCR)." i-manager’s Journal on Electrical Engineering 16, no. 2 (2022): 28. http://dx.doi.org/10.26634/jee.16.2.19226.

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Harmonics have become an important issue as the number of non-linear elements and electronic devices coupled to electrical power systems increases by the day. A Fixed Capacitor Thyristor Controlled Reactor (FC-TCR) is widely used in power systems to continuously control reactive power. This paper presents the harmonic analysis of a three-phase FC-TCR under different operating conditions using the Dynamic Harmonic Domain (DHD) technique. The existing Harmonic Domain (HD) method is widely used to obtain the steady-state harmonics in the power grid. It is not possible to calculate transient harmo

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17

Wang, Guishuo, Xiaoli Wang, and Chen Zhao. "An Iterative Hybrid Harmonics Detection Method Based on Discrete Wavelet Transform and Bartlett–Hann Window." Applied Sciences 10, no. 11 (2020): 3922. http://dx.doi.org/10.3390/app10113922.

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The current signal harmonic detection method(s) cannot reduce the errors in the analysis and extraction of mixed harmonics in the power grid. This paper designs a harmonic detection method based on discrete Fourier transform (DFT) and discrete wavelet transform (DWT) using Bartlett–Hann window function. It improves the detection accuracy of the existing methods in the low frequency steady-state part. In addition, it also separates the steady harmonics from the attenuation harmonics of the high frequency part. Simulation results show that the proposed harmonic detection method improves the dete

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18

Kuchuk, Kfir, and Uri Sivan. "Accurate, explicit formulae for higher harmonic force spectroscopy by frequency modulation-AFM." Beilstein Journal of Nanotechnology 6 (January 13, 2015): 149–56. http://dx.doi.org/10.3762/bjnano.6.14.

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The nonlinear interaction between an AFM tip and a sample gives rise to oscillations of the cantilever at integral multiples (harmonics) of the fundamental resonance frequency. The higher order harmonics have long been recognized to hold invaluable information on short range interactions but their utilization has thus far been relatively limited due to theoretical and experimental complexities. In particular, existing approximations of the interaction force in terms of higher harmonic amplitudes generally require simultaneous measurements of multiple harmonics to achieve satisfactory accuracy.

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19

Zhang, Min, Huiqiang Zhi, Shifeng Zhang, Rui Fan, Ran Li, and Jinhao Wang. "Modeling of Non-Characteristic Third Harmonics Produced by Voltage Source Converter under Unbalanced Condition." Sustainability 14, no. 11 (2022): 6449. http://dx.doi.org/10.3390/su14116449.

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A three-phase three-wire voltage source converter (VSC) can produce third harmonics when it is operated under an unbalanced condition. It is essential to understand the mechanism of the production of this third harmonic and to assess its impact on power systems. Therefore, this paper presents an analytical model of the VSC under the unbalanced condition through mathematical derivations, and the final model is a coupled Thevenin circuit. The proposed model allows for direct computation of the non-characteristic third harmonics through harmonic power flow studies. The results show that VSC under

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20

Almaita, Eyad. "Harmonic Assessment in Jordanian Low-Voltage Electrical Power Grid." EARTH SCIENCES AND HUMAN CONSTRUCTIONS 1 (April 8, 2021): 25–29. http://dx.doi.org/10.37394/232024.2021.1.4.

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With the proliferation of nonlinear loads in the power system, harmonic pollution becomes a serious problem that affects the power quality in both transmission and distribution systems. Understanding and quantifying the harmonics level in electrical power grid are crucial before proposing any successful method for mitigating harmonics problems in the grid. In this paper, the harmonics level in Jordan Low-Voltage Electrical Power Grid (JLVEPG) is investigated. The loads are divided into five categories: : (i) industrial loads, (ii) commercial loads, (iii) hospital loads, (iv) residential loads,

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21

Chen, Yimo, Fanrui Kong, Kai Zeng, et al. "A Trimming Strategy for Mass Defects in Hemispherical Resonators Based on Multi-Harmonic Analysis." Micromachines 16, no. 4 (2025): 480. https://doi.org/10.3390/mi16040480.

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This study investigates the impact of etching trimming parameters on the multiple harmonics of the mass distribution in hemispherical resonators and proposes a novel 1st harmonic trimming scheme. As mass balancing technology advances, the extension of identification and trimming from frequency split to multiple harmonics remains a challenge. Initially, a multi-harmonic identification scheme based on spurious mode detection was established, considering the influence of the first three harmonics of the mass distribution on the dynamic characteristics of hemispherical resonators. Finite element m

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22

Wu, Shan-He, Imran Abbas Baloch, and İmdat İşcan. "On Harmonically(p,h,m)-Preinvex Functions." Journal of Function Spaces 2017 (2017): 1–9. http://dx.doi.org/10.1155/2017/2148529.

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We define a new generalized class of harmonically preinvex functions named harmonically(p,h,m)-preinvex functions, which includes harmonic(p,h)-preinvex functions, harmonicp-preinvex functions, harmonich-preinvex functions, andm-convex functions as special cases. We also investigate the properties and characterizations of harmonically(p,h,m)-preinvex functions. Finally, we establish some integral inequalities to show the applications of harmonically(p,h,m)-preinvex functions.

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23

Lin, Yu-Ting, Jonq-Chin Hwang, Cheng-Ting Tsai, and Cheng-Tsung Lin. "Implementation of a Current Harmonics Suppression Strategy for a Six-Phase Permanent Magnet Synchronous Motor." Energies 18, no. 3 (2025): 665. https://doi.org/10.3390/en18030665.

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This paper proposes a current harmonic suppression strategy that combines harmonic synchronous rotating frame (HSRF) current feedback control and back-electromotive force harmonic (BEMFH) feedforward compensation to suppress the fifth and seventh current harmonics of a six-phase permanent magnet synchronous motor (PMSM). The current harmonics of six-phase PMSMs vary with the current due to manufacturing imperfections and the inverter nonlinearity effect. Using fixed-parameter BEMFH feedforward compensation cannot completely eliminate current harmonics. This paper integrates a closed-loop harmo

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Qin, Xuelong, Guoqiang He, Xuexia Yang, and Steven Gao. "A Compact Rectifier Design Method Utilizing Harmonics." Applied Sciences 11, no. 5 (2021): 2295. http://dx.doi.org/10.3390/app11052295.

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This paper proposes a compact rectifier design method for utilizing harmonics. Based on total reflection generated by pure reactance loads at the second harmonic (2nd) and open circuit at the third harmonic (3rd), a compact DC-pass filter is designed to effectively utilize the 2nd and 3rd harmonics excited by the rectifying diode. The amplitudes of the harmonics can be controlled by adjusting the input impedances of the DC-pass filter at harmonics. A prototype operating at 5.8 GHz fundamental frequency is implemented and measured to validate the scenario. When the input power is 18.3 dBm, the

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Zhong, Qing, Junjie Feng, Gang Wang, and Haifeng Li. "Feedforward Harmonic Mitigation Strategy for Single-Phase Voltage Source Converter." Journal of Electrical and Computer Engineering 2018 (2018): 1–10. http://dx.doi.org/10.1155/2018/5909346.

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With the development of distributed generations (DGs), single-phase voltage source converter (SPVSC) has been widely used, but it brings about the problem of harmonic pollution to power grid. Hence, it is significant to explore the mechanism of harmonic injection from SPVSC and propose effective control strategies to mitigate the harmonic pollution. In this paper, a harmonic analysis model of SPVSC based on dynamic phasor (DP) has been established. With the model, the harmonics interaction between the ac side and the dc side can be analyzed with the consideration of the control strategies, whi

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Zhang, Feng, Jue Long Li, Chong Feng Tian, Zong Jie Liu, Hai Feng Ye, and Xiu Chen Jiang. "Binary Scale Time Windows FFT for Harmonic Analysis." Applied Mechanics and Materials 448-453 (October 2013): 2003–10. http://dx.doi.org/10.4028/www.scientific.net/amm.448-453.2003.

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Various harmonics exist in the electrical power system, and the harmonics include both integer harmonics and non-integer harmonics. It is hard to analyze all the harmonics accurately. In order to improve the precision of harmonic analysis and the minimum resolution, this paper presents a new algorithm named binary scale time windows FFT based on traditional algorithm.This algorithm considers the calculative time and precision well. The results of the test indicate that this algorithm can both guarantee the accuracy and raise the resolving power in the harmonic analysis without increasing the h

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27

Zhao, Keyu. "Grid-Connected PV System Harmonic Analysis." MATEC Web of Conferences 404 (2024): 02005. http://dx.doi.org/10.1051/matecconf/202440402005.

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The inverter’s output impedance can be adjusted to reduce harmonic interference on the grid. Advanced current control strategies like PI and quasi-PR control enable precise control of the inverter’s output current, further reducing harmonics. PI control compensates for error signals to eliminate steady-state errors but has limited ability to suppress harmonics in high-frequency ranges. Quasi-PR control combines proportional, integral, and resonance control to suppress specific frequency harmonics. Establishing a grid-connected photovoltaic inverter and harmonic source model is crucial for grid

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28

Lowczowski, Krzysztof, Jaroslaw Gielniak, Zbigniew Nadolny, and Magdalena Udzik. "Analysis of the Impact of Volt/VAR Control on Harmonics Content and Alternative Harmonic Mitigation Methods." Energies 17, no. 22 (2024): 5561. http://dx.doi.org/10.3390/en17225561.

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This article presents information about harmonic distortion and resonance in distribution networks. The theory behind harmonics and resonance is presented. Examples from the literature and the results of power quality measurements, as well as the authors’ experiences connected with significant changes in harmonic distortions, are presented. The harmonic resonance phenomenon is explained, and the risk of resonance in a distribution system network is highlighted. Attention is paid to the connection of a new power plant to the network; however, other risks, e.g., those connected to network reconf

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29

Sayrac, Muhammed. "Generation of Coherent Extreme Ultraviolet Radiation in an Air Gas Cell with a High Power Femtosecond Laser System-=SUP=-*-=/SUP=-." Оптика и спектроскопия 129, no. 6 (2021): 764. http://dx.doi.org/10.21883/os.2021.06.50989.1041-20.

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High harmonic generation (HHG) in air medium is experimentally produced by using a state-of-the-art high power laser system. The harmonic orders up to 35th harmonics are well observed. Optical power dependence of harmonic spectrum is obtained. The dynamics of a free electron in an intense laser field presents good agreement with the experimental results. The air medium is used as an interaction medium since air is a ready source in abundance. The harmonic spectral distribution is similar to that obtained in noble gases. Experimental results of harmonics produced in air medium follow the same t

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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.

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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 e

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Ganeev, Rashid A. "High-Order Harmonics Generation in Selenium-Containing Plasmas." Photonics 10, no. 7 (2023): 854. http://dx.doi.org/10.3390/photonics10070854.

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The studies of the high-order harmonics generated in Se-containing plasmas are reported. The ablation of selenium in a vacuum allowed for the formation of a plasma demonstrating high-order harmonics generation and resonance enhancement of the harmonic at the shortest wavelength reported so far (λ ≈ 22.9 nm, Eph ≈ 54.14 eV). This harmonic corresponds to the 35th order of the 800-nm-class lasers. The influence of the presence of selenium in the molecular state (ZnSe and HgSe) on the suppression of the resonance effect during harmonics generation in plasma is studied. The enhanced 35th harmonic w

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Vatansever, Fahri, and Nedim Aktan Yalcin. "The Design of Harmonic Simulator based on Hartley Transform." Academic Perspective Procedia 1, no. 1 (2018): 21–24. http://dx.doi.org/10.33793/acperpro.01.01.7.

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Increase in the number of nonlinear loads and devices in energy and power systems have raised harmonic distortion on voltage and current signals. Harmonics are one of the primary factors in determining power quality. Therefore, measurement and control of harmonics are crucial. Many methods have developed for harmonic analysis. In this study, a simulator which uses Hartley transform for determining harmonics is designed. Harmonic distributions and parameters of loaded/defined signals can be calculated accurately and effectively and obtained results can be displayed numerically and graphically w

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K., Venkateswararao, and Joga Rao G. "THD Minimization in Cascaded H-Bridge Inverter using Optimal Selective Harmonic Elimination." International Journal of Recent Technology and Engineering (IJRTE) 10, no. 2 (2021): 170–74. https://doi.org/10.35940/ijrte.B5984.0710221.

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Cascaded structured multilevel inverters are gaining lot of importance due to their simple structure and easiness in implementation. In this paper, the optimum selective harmonic elimination method is employed for a nine level inverter to suppress the selected lower order harmonic, which reduces the total harmonic distortion of the inverter considerably. The Newton rapson algorithm is employed in finding the switching angles that minimizes certain lower order harmonics. The order of the harmonics that are eliminated are third, fifth, and seventh harmonics. All the simulation results included f

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Ji, Yanpeng, Bin Li, and Jingcheng Sun. "Harmonic Analysis on Torque Ripple of Brushless DC Motor Based on Advanced Commutation Control." Journal of Control Science and Engineering 2018 (2018): 1–9. http://dx.doi.org/10.1155/2018/3530127.

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This paper investigates the relationship between current, back electromotive force (back-EMF), and torque for permanent-magnet brushless DC (PM BLDC) motors under advanced commutation control from the perspective of harmonics. Considering that the phase current is the influencing factor of both torque and torque ripple, this paper firstly analyzes the effects of advanced commutation on phase current and current harmonics. And then, based on the harmonics of the phase current and back-EMF, the torque harmonic expressions are deduced. The expressions reveal the relationship of harmonic order bet

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Nisja, Indra, A. Z. Abdullah, S. Masri, and S. Hardi. "Laboratory Test of Current Transformer Operates under Harmonic Conditions." Applied Mechanics and Materials 793 (September 2015): 222–25. http://dx.doi.org/10.4028/www.scientific.net/amm.793.222.

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This research focused on the effect of harmonic to the performance of current transformer (CT) operates under harmonic conditions. Due to the increasing of harmonic in power system, the CT did not perform well. The CT may saturates due to the presence of voltage and current harmonics. In this project, a laboratory test was conducted to investigate and analyze the influence of harmonics to the CT performance. This CT has been test with different Total Harmonic Distortion Current (THDi) at primary side and constant primary current. The experiment result shows the secondary current CT errors will

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Wu, Lubin, Ziquan Liang, Weihua Li, and Xiaoteng Wang. "Harmonic Suppression Strategy in Single-phase SPWM Based on Mixed Integer Nonlinear Programming." Modern Applied Science 13, no. 5 (2019): 22. http://dx.doi.org/10.5539/mas.v13n5p22.

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In single-phase bipolar SPWM inverter circuit, the output voltage contains high content of harmonic components. To solve this problem, we build a model of output voltage in single-phase SPWM bipolar inverter based on SPWM theory and Fourier series theory. Through theoretical analysis, calculation and plotting, we work out the distribution of harmonic in output voltage, investigate the relationship between amplitude modulation (AM) depth and harmonic components and finally determine a proper amplitude modulation depth to efficiently reduce harmonic components. To further reduce harmonic compone

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Boora, Kamaldeep, Anurag Kumar, Isha Malhotra, and Vikram Kumar. "Harmonic reduction using Particle Swarm Optimization based SHE Modulation Technique in Asymmetrical DC-AC Converter." International journal of electrical and computer engineering systems 13, no. 10 (2022): 867–75. http://dx.doi.org/10.32985/ijeces.13.10.10.

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Many inverters play an important role in transmitting and processing energy to power system networks. To reduce the cost and size of multilevel inverters, various topologies have been included in the literature. But these topologies do not look at the complete harmonic distortion in the output waveform. In this study, a modern multilevel inverter structure, a mutated H-bridge inverter is adopted that demands a small amount of switches, driver circuits, power diodes and DC voltage sources compared to conventional multilevel inverters to produce the required level in the output voltage. The muta

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Li, Weibin, Mingxi Deng, and Younho Cho. "Cumulative Second Harmonic Generation of Ultrasonic Guided Waves Propagation in Tube-Like Structure." Journal of Computational Acoustics 24, no. 03 (2016): 1650011. http://dx.doi.org/10.1142/s0218396x16500119.

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Second harmonic generation of ultrasonic waves propagating in unbounded media and plate-like structure has been vigorously studied for tracking material nonlinearity, however, second harmonic guided wave propagation in tube-like structures is rarely studied. Considering that second harmonics can provide sensitive information for structural health condition, this paper aims to study the second harmonic generation of guided waves in metallic tube-like structures with weakly nonlinearity. Perturbation method and modal analysis approach are used to analyze the acoustic field of second harmonic sol

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Yoshida, Akito, and Kan Akatsu. "Study of Winding Structure to Reduce Harmonic Currents in Dual Three-Phase Motor." World Electric Vehicle Journal 14, no. 4 (2023): 100. http://dx.doi.org/10.3390/wevj14040100.

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Dual three-phase motors have the problem of a large generation of harmonic currents while driving due to small inductance for certain harmonics. The purpose of this paper is to theoretically clarify the effect of the winding structure of dual three-phase motors on harmonic currents. Analytical calculations considering the spatial harmonics of the magnetomotive force are used to formulate the inductance that depends on the winding structure and the harmonic order. The validity of the formulated theoretical expression of the inductance is confirmed by finite element analysis. In addition, drive

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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.

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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 ou

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Liang, Jian, Shuang Zhang, Yong Ren, and Yuanchu Cheng. "Harmonics Current Detection in Three-phase Circuit using Neural Network." Journal of Physics: Conference Series 2242, no. 1 (2022): 012043. http://dx.doi.org/10.1088/1742-6596/2242/1/012043.

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Abstract Harmonics seriously affect the safety and economy of power system. In order to control harmonics effectively, harmonic current and harmonic power must be detected quickly. Based on the analysis of the components of three-phase nonlinear current, a neural network detection method of fundamental and harmonic current in three-phase circuit is proposed. The method uses a neural network instead of the low-pass filter in the instantaneous reactive power theory. The example results show that the proposed method has the advantages of less computation, better real-time performance and high det

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Junesco, Devan, Shahad Al-Youif, Mohannad Jabbar Mnati, and Mohammad Ali Tofigh. "Various Passive Filter Designs Proposed for Harmonic Extenuation in Industrial Distribution Systems." International Journal of Engineering & Technology 7, no. 4.11 (2018): 75. http://dx.doi.org/10.14419/ijet.v7i4.11.20691.

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This paper discusses various passive filter designs to reduce the harmonic in the industrial distributions system. The passive filter used is a single and double tuned harmonic filter. In the designing of this filter, analyzing filter properties of passive component of the filter. The study was conducted to examine the efficacy of using single and double tuned filters in reducing harmonic as well as determining the best location to install the filters. Different system effects and load limits on harmonic distortion and performance of filters are also being examined. The output of the simulatio

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Xu, Maoguang, Zhongqing Sang, Xiang Li, Yimin You, and Dongyun Dai. "An Observer-Based Harmonic Extraction Method with Front SOGI." Machines 10, no. 2 (2022): 95. http://dx.doi.org/10.3390/machines10020095.

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With the further development of harmonic pollution in the power system, scientists have carried out research on harmonics. Among them, harmonic detection is the first step in harmonic research. In this paper, a harmonic detection method based on an observer is proposed. This method first uses the cascaded Second-Order Generalized Integration (SOGI) algorithm, which can filter the Direct Current (DC) component of the input signal to extract the fundamental frequency, and then uses a time-varying observer to extract the harmonics. This can be used to extract harmonics from a distorted online gri

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Zhao, Jinshuai, Honggeng Yang, Xiaoyang Ma, and Fangwei Xu. "Evaluation of Harmonic Contributions for Multi Harmonic Sources System Based on Mixed Entropy Screening and an Improved Independent Component Analysis Method." Entropy 22, no. 3 (2020): 323. http://dx.doi.org/10.3390/e22030323.

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Evaluating the harmonic contributions of each nonlinear customer is important for harmonic mitigation in a power system with diverse and complex harmonic sources. The existing evaluation methods have two shortcomings: (1) the calculation accuracy is easily affected by background harmonics fluctuation; and (2) they rely on Global Positioning System (GPS) measurements, which is not economic when widely applied. In this paper, based on the properties of asynchronous measurements, we propose a model for evaluating harmonic contributions without GPS technology. In addition, based on the Gaussianity

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Wang, Xiangrong, and Guangtian Shi. "Analysis of harmonic influence of improved PFC circuit on SS4G electric locomotive." Journal of Physics: Conference Series 2260, no. 1 (2022): 012032. http://dx.doi.org/10.1088/1742-6596/2260/1/012032.

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Abstract Compared with active filter, PFC circuit has simple structure and convenient operation. Introducing it into SS4G electric locomotive can greatly reduce system harmonics. Therefore, firstly, the corresponding PFC circuit is built, and the suppression measures of peak section and discontinuous section are proposed. By improving the discontinuous section, the waveform conduction angle is expanded from 129.564° to 162.882°. Accordingly, the current harmonic at the input side is reduced from 27.38% to 16.19%. After the voltage multiplier is further introduced, the harmonic is reduced to 15

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Ma, Chi, Wenzhong Xu, Mingtian Liu, and Jianfeng Hong. "Low Vibration Control Scheme for Permanent Magnet Motor Based on Resonance Controllers." Energies 17, no. 18 (2024): 4666. http://dx.doi.org/10.3390/en17184666.

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For an electric locomotive traction motor, it is necessary to maintain relatively low vibration and noise due to the higher design standards. By using effective motor control strategies and implementing current harmonic suppression schemes, motor efficiency and vibration and noise suppression can be effectively improved. This study investigates the current harmonic suppression strategy for permanent magnet synchronous motors by (1) constructing a mathematical model of the permanent magnet motor to explore the sources of low-order harmonics currents such as fifth and seventh harmonics, as well

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Damjanović, Ivana, Frano Tomašević, Ivica Pavić, Božidar Filipović-Grčić, and Alan Župan. "Harmonic Performance Analysis of Static Var Compensator Connected to the Power Transmission Network." Journal of Energy - Energija 67, no. 2 (2022): 13–22. http://dx.doi.org/10.37798/201867276.

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The static var compensator (SVC) is a device which is designed to compensate reactive power, increase voltage stability and to reduce voltage fluctuations. Thyristor controlled reactors (TCRs) are composed of reactors in series with bidirectional pair of thyristors. Current through reactors can be continuously controlled by changing the firing angle of thyristor valves, thus the inductive power can be easily controlled. Typical applications of TCRs in AC systems are voltage stabilization and temporary overvoltage reduction, stability improvement, damping of power oscillations and load ba

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Ambade, Pooja Sukhdev, Prof Gaurav S. Karlekar, and Prof Praful S. Tadse. "Harmonic Reduction of Multilevel Inverters Using Particle Swarm Optimization." International Journal of All Research Education and Scientific Methods 13, no. 05 (2025): 30–39. https://doi.org/10.56025/ijaresm.2025.1305250030.

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In modern power systems, the growing integration of renewable energy sources and sensitive electronic loads has exacerbated harmonic distortion concerns, leading to compromised power quality. Conventional harmonic reduction methods frequently fall short in addressing complex and dynamic harmonic profiles. To confrontation this challenge, our proposed system harnesses Particle Swarm Optimization to dynamically optimize switching angles in multilevel inverters, efficiently mitigating harmonics and ensuring a stable and high-grade power supply. The paper emphases on improving the harmonic perform

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Liu, Bai Fen, Yun Chen, and Xian Wu Fang. "Harmonic Monitoring Based on BP Neural Network." Advanced Materials Research 532-533 (June 2012): 1354–58. http://dx.doi.org/10.4028/www.scientific.net/amr.532-533.1354.

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This article applies the BP neural network theory into the measuring of harmonics, through the model automatically learn training capacity to create real-time monitoring model of harmonic. And that I am using matlab simulation, to obtained harmonic simulation data. Through this simulation technology to monitor the harmonic and obtain real-time data, the data can provide reference for harmonic suppression.

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Kutsyk, Andriy, Mariusz Korkosz, Mykola Semeniuk, and Marek Nowak. "An Influence of Spatial Harmonics on an Electromagnetic Torque of a Symmetrical Six-Phase Induction Machine." Energies 16, no. 9 (2023): 3813. http://dx.doi.org/10.3390/en16093813.

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The analyses of the influence of spatial harmonics on the electromagnetic torque of the multi-phase induction machine and reducing this influence are important tasks to ensure the high efficiency of the induction machine. Designing the machine to consider the influence of spatial harmonics is essential to ensure the desired mechanical and energy characteristics. In the case of the sinusoidal winding supply of the induction machine, the magnetomotive force has high spatial harmonics, which are caused by the machine-winding design. The interaction between the 5th, 7th, 11th and 13th spatial harm

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