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Journal articles on the topic 'Total Harmonic Distortion Measurement'

Author: Grafiati

Published: 4 June 2021

Last updated: 13 February 2022

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1

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.

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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

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2

Lin, Hsiung Cheng. "Remote Power System Harmonics Measurement and Monitoring via the Internet." International Journal of Electrical Engineering & Education 42, no. 3 (2005): 267–79. http://dx.doi.org/10.7227/ijeee.42.3.5.

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Traditional methods to measure power system harmonics employ either a power harmonic analyser or a software package such as Matlab. However, these usually have limited capability when used with an Internet connection and/or graphical interface. In this paper, a PC-based virtual instrument (VI) that can carry out remote measurement and monitoring using LabVIEW and a microprocessor (Intel 8051) for power system harmonics is proposed. The history of total harmonic distortion (THD) in the waveform signal can be also recorded and tracked in the database.

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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.

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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 o

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Faranadia, Abdul Haris, and Ahmad Maliki Omar. "Total Harmonic Distortion Assessment of 17kWp Grid Connected Photovoltaic Systems." Applied Mechanics and Materials 785 (August 2015): 435–39. http://dx.doi.org/10.4028/www.scientific.net/amm.785.435.

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This paper presents prediction of total harmonic distortion (THD) on Grid Connected Photovoltaic (GCPV) power systems towards Malaysia climate variations (solar irradiance) by using Mathematical approach. The actual and prediction data measurement were analyzed on three types of solar cell technologies; monocrystalline, polycrystalline and thin film. Each PV array works with different types of inverters which are located at Green Energy Research Center (GERC), University of Technology MARA (UiTM) Shah Alam, Selangor. The prediction and detail analysis of total harmonic distortion is carried ou

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Wartono, Ady, Irzan Zakir, and Massus Subekti. "HARMONISA LISTRIK GEDUNG PUSDIKLAT KETENAGALISTRIKAN ENERGI BARU TERBARUKAN DAN KONSERVASI ENERGI (KEBTKE) CIRACAS (SUATU STUDI PENELITIAN DI GEDUNG UTAMA PUSDIKLAT CIRACAS)." Journal of Electrical Vocational Education and Technology 1, no. 2 (2020): 16–20. http://dx.doi.org/10.21009/jevet.0012.03.

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Abstract  Harmonic distortion is a phenomenon arising due to the use of a non linear load on the power system. This phenomenon can cause problems on quality in terms of power will eventually cause various losses and even damage to several electrical appliances. The purpose of this research is to know the value of the harmonic distortion of current/Total Harmonic Distortion (THDi) and voltage/Total Harmonic Distortion (THDv) of electrical installation system Pusdiklat (KEBTKE) Ciracas using by Power Quality Analyzer and load mappings for each floor. This research was carried out at the ma

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Pawar, Suryappa Jayappa, Soar Weng, and Jin Huang Huang. "Experimental Verifications and Simulations of Magnetic Motor of Circular Miniature Loudspeaker for Total Harmonic Distortion Improvement." Applied Mechanics and Materials 87 (August 2011): 136–39. http://dx.doi.org/10.4028/www.scientific.net/amm.87.136.

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The reduction in total harmonic distortion of miniature loudspeaker is reported by investigating the force factor (Bl(x)). Micro tensile testing is employed to get Bl(x) vs x curves, which verify finite element simulation. Furthermore, magnetic system of miniature loudspeaker is modified to obtain tailor made Bl(x) vs x curves. Based on it, prototypes are fabricated, which is followed by total harmonic distortion and sound pressure level measurements in an anechoic chamber. Measurements reveal a significant reduction in total harmonic distortion without affecting the sound pressure level.

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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.

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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.

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8

PARK, Jeung geun, and Che young KIM. "Electromagnetic Interference Analysis Based on Total Harmonic Distortion Measurement in 900MHz Cordless Telephones." IEICE Transactions on Communications E93-B, no. 9 (2010): 2348–53. http://dx.doi.org/10.1587/transcom.e93.b.2348.

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9

Bacelar Milhomem, Thiago Antônio, Zemar Martins Defilippo Soares, Gustavo Palmeira Ripper, et al. "Distortion measurements of sound pressure level generated by a pistonphone." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, no. 6 (2021): 100–111. http://dx.doi.org/10.3397/in-2021-1136.

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A supplementary interlaboratory comparison on pistonphone calibration was performed between 2018 and 2020 under the auspices of the Inter-American Metrology System. Seven national metrology institutes took part in this comparison. One pistonphone was circulated among the participants for measurement of the generated sound pressure level, frequency, total distortion + noise and total harmonic distortion. This paper presents the results of distortion measurements and analyzes them. From the stability check, notable variances with respect to reported measurement uncertainty were observed. From re

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Sinvula, Rosalia, Khaled Mohamed Abo-Al-Ez, and Mohamed Tariq Kahn. "A Proposed Harmonic Monitoring System for Large Power Users Considering Harmonic Limits." Energies 13, no. 17 (2020): 4507. http://dx.doi.org/10.3390/en13174507.

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Most power utilities within Southern Africa are faced with the challenges of harmonic distortion due to the high penetration of renewable energy sources (RES) and the use of electronic devices. There is an excessive total harmonic distortion (THD) measured at the point of common coupling (PCC). In this paper, a proposed harmonic monitoring system for large power users (LPUs) is developed. This proposed system considers harmonic limits of the individual and THD of the customers allowed injecting into the network, which should be part of the contractual electricity supply agreement (ESA). Hence,

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Kao, Wei-Tse, Jonq-Chin Hwang, and Jia-En Liu. "Development of Three-Phase Permanent-Magnet Synchronous Motor Drive with Strategy to Suppress Harmonic Current." Energies 14, no. 6 (2021): 1583. http://dx.doi.org/10.3390/en14061583.

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This study aimed to develop a three-phase permanent-magnet synchronous motor drive system with improvement in current harmonics. Considering the harmonic components in the induced electromotive force of a permanent-magnet synchronous motor, the offline response of the induced electromotive force (EMF) was measured for fast Fourier analysis, the main harmonic components were obtained, and the voltage required to reduce the current harmonic components in the corresponding direct (d-axis) and quadrature (q-axis) axes was calculated. In the closed-loop control of the direct axis and quadrature axi

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12

Shi, Yan, Xing Liang Jiang, Qi Fa Wan, Xiong Wu, and Tao Xu. "Measurement and Analysis of the Leakage Current on the Surface of Polluted Suspension Ceramic Insulator." Applied Mechanics and Materials 48-49 (February 2011): 668–74. http://dx.doi.org/10.4028/www.scientific.net/amm.48-49.668.

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The artificial pollution tests are implemented on an IEC standard suspension insulator, and the leakage current waveforms and frequency characteristics were investigated under different equivalent salt deposit density ESDD and relative humidity. It was found that the peak values of the leakage current, the total harmonic distortion (THD) and the odd order harmonic components, e.g. 150 and 650Hz, were significantly correlated with the contamination condition of the insulator surfaces. Besides, a new characteristic parameter IMR，defined as the product of the peak values of leakage current by the

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Komuro, Takanori, Shingo Sobukawa, Hiroshi Sakayori, Masashi Kono, and Haruo Kobayashi. "Total Harmonic Distortion Measurement System of Electronic Devices up to 100 MHz With Remarkable Sensitivity." IEEE Transactions on Instrumentation and Measurement 56, no. 6 (2007): 2360–68. http://dx.doi.org/10.1109/tim.2007.904548.

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14

Abdullah, Abdul Rahim, N. A. Abidullah, N. H. Shamsudin, N. H. H. Ahmad, and M. H. Jopri. "Performance Verification of Power Quality Signals Classification System." Applied Mechanics and Materials 752-753 (April 2015): 1158–63. http://dx.doi.org/10.4028/www.scientific.net/amm.752-753.1158.

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Power quality has become a greater concern nowadays. The increasing number of power electronics equipment contributes to the poor quality of electrical power supply. The power quality signals will affect manufacturing process, malfunction of equipment and economic losses. This paper presents the verification analysis of power quality signals classification system. The developed system is based on linear time-frequency distribution (TFD) which is spectrogram that represents the signals jointly in time-frequency representation (TFR). The TFD is very appropriate to analyze power quality signals t

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15

Huan, S. L., and A. R. Pater. "Analysis and prediction of geophone performance parameters." GEOPHYSICS 50, no. 8 (1985): 1221–28. http://dx.doi.org/10.1190/1.1441994.

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In the past, designers relied greatly on simplified geophone models to describe the physical quantities of a geophone. Several iterations of fine tuning the geophone variables were required to achieve a desired geophone characteristic. Although many geophone prototypes were built before a geophone design was finalized, it was still impossible to assure an optimum geophone design. An easier, faster, and more accurate method of predicting geophone parameters is described and the method of computer‐aided geophone design is outlined. A description of a nonlinear geophone model is presented and a n

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16

Hu, Yang Yu, Hong Jun Fu, Jun Yong Wu, Lu Yu Ji, and Xi Lu Zhang. "Measurement and Analysis on Power Quality of Electric Railway Traction Substation Based on LabVIEW." Advanced Materials Research 383-390 (November 2011): 5034–39. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.5034.

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A general power quality measuring system based on virtual instrument (LabVIEW) has been developed. For two electric railway traction transformers of Zhengzhou-Xi’an High Speed Passenger Dedicated Line, which access to Zhengzhou, Henan Grid, some important power quality parameters have been measured and analyzed. Then, the analysis results are compared with the calculation results by Power System Harmonic Penetration Software (PSHP), which is developed by our group. It shows that real measured data of Harmonic Ratio and Three-phase Unbalanced Factor of electric railway traction substations is c

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17

Samadaei, Emad, Alireza Khosravi, and Abdolreza Sheikholeslami. "Optimal Allocation of Active Power Filter On real distribution network for improvement of power quality by use of BBO: A case study." IIUM Engineering Journal 18, no. 1 (2017): 85–99. http://dx.doi.org/10.31436/iiumej.v18i1.688.

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ABSTRACT:Â According to development of power electronics device, harmonic distortion spread on the network. Thus harmonic is a threat for instrument, network, decreasing of line capacity and etc. Active power ï¬lter (APF) can be employed for harmonic compensation in power systems. In this paper a distorted distribution feeder is considered and analyzed from power quality viewpoint using power analyzer device and simulated in MATLAB-Mfile. Then the size and place of active power filters are determined by use of Biogeography Based Optimization (BBO). The goal of this optimization is minimizing

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18

Michalec, Łukasz, Michał Jasiński, Tomasz Sikorski, Zbigniew Leonowicz, Łukasz Jasiński, and Vishnu Suresh. "Impact of Harmonic Currents of Nonlinear Loads on Power Quality of a Low Voltage Network–Review and Case Study." Energies 14, no. 12 (2021): 3665. http://dx.doi.org/10.3390/en14123665.

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The paper presents a power-quality analysis in the utility low-voltage network focusing on harmonic currents’ pollution. Usually, to forecast the modern electrical and electronic devices’ contribution to increasing the current total harmonic distortion factor (THDI) and exceeding the regulation limit, analyses based on tests and models of individual devices are conducted. In this article, a composite approach was applied. The performance of harmonic currents produced by sets of devices commonly used in commercial and residential facilities’ nonlinear loads was investigated. The measurements we

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19

Mingotti, Alessandro, Lorenzo Peretto, and Roberto Tinarelli. "A Closed-form Expression to Estimate the Uncertainty of THD Starting from the LPIT Accuracy Class." Sensors 20, no. 6 (2020): 1804. http://dx.doi.org/10.3390/s20061804.

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Power quality is a wide-ranging and current topic that involves a huge effort from the scientific community. Power quality issues have to be avoided or solved in order to preserve the integrity of the network and its assets. To this purpose, several power quality indexes and measurement techniques have been developed and used by experts. This paper aims at solving the issue of having an uncertainty associated to the total harmonic distortion (THD) measurements. The idea is to obtain a close-form expression, which only requires the knowledge of the instrument transformer accuracy class, to esti

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20

Bulycheva, Evgeniia, and Sergey Yanchenko. "Real-time harmonic identification under varying grid conditions." Serbian Journal of Electrical Engineering 18, no. 1 (2021): 29–48. http://dx.doi.org/10.2298/sjee2101029b.

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One of the challenges of the power quality management is a need for reliable harmonic identification in grids with multiple non-linear loads. This paper proposes a novel method to accurately determine time-varying harmonic contributions of non-linear loads to the total grid voltage distortion. The use of the invasive measurement approach and ternary pulse sequence as a stimuli guarantees an accurate assessment of harmonic contribution with the account for timevariating harmonic impacts. The application of proposed approach is demonstrated by means of time-domain grid simulation with implemente

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21

Kim Gan, Chin, Sara Ragab Mahmoud, Kyairul Azmi Baharin, and Mohd Hendra Hairi. "Influence of Single-Phase Solar Photovoltaic Systems on Total Harmonic Distortion: A Case Study." Indonesian Journal of Electrical Engineering and Computer Science 12, no. 2 (2018): 607. http://dx.doi.org/10.11591/ijeecs.v12.i2.pp607-611.

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<span>The installation of small-scale solar photovoltaic system has recently gaining popularity in Malaysia mainly driven by the Feed-in Tariff scheme. Given its relatively small generation capacity, the single-phase solar inverters are not required to comply with power quality standard. Neverthelss, the impact of small-scale solar system on the grid could become significant when the penetration is increasing over the years. In this regard, this paper presents a case study on the influence of single-phase grid-connected solar photovoltaic systems on the total harmonic distortion for curr

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Dwisetyo, Bondan, Denny Hermawanto, Dodi Rusjadi, Chery Chaen Putri, Maharani Ratna Palupi, and Fajar Budi Utomo. "REALIZATION OF TOTAL HARMONIC DISTORTION MEASUREMENT OF ACOUSTIC SOURCE SIGNAL SYSTEM FOR FREQUENCY OF 125 HZ AND 1000 HZ." Jurnal Standardisasi 21, no. 3 (2019): 237. http://dx.doi.org/10.31153/js.v21i3.794.

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<p>The measurement of total harmonic distortion (THD) of an acoustic source signal system has carried out in Laboratory Acoustics and Vibration, Sub-directorate of National Measurement Standards for Acoustics and Vibration - BSN. The aim of this research is, therefore, to measure and analize the THD values that produced by the system that consists of a signal generator, a power amplifier, and a passive loudspeaker with fundamental frequencies of 125 Hz and 1000 Hz. This measurement should be implemented because it has never been performed in this laboratory. Moreover, this system always

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Cahyadi, Catra Indra, I. Gusti Agung Ayu Mas Oka, and Yanti Daryanti. "Pengaruh Harmonic pada Peralatan Tegangan Satu Phasa di Ruangan Administrasi Bandara." TELKA - Telekomunikasi Elektronika Komputasi dan Kontrol 7, no. 1 (2021): 71–76. http://dx.doi.org/10.15575/telka.v7n1.71-76.

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Beban non linier yang belum berbentuk gelombang sinusoidal telah terdistorsi oleh distorsi harmonisa arus. Beban non linier merupakan salah satu penyebab timbulnya distorsi yang dapat mengakibatkan kualitas daya listrik semakin buruk. Paper ini membahas hasil simulasi penggunaan filter tunggal yang disetel untuk mengurangi distorsi yang disebabkan oleh beban non linier akibat personal computer dan printer untuk pencetakan. Pengukuran menggunakan alat power quality analyzer fluke. Hasil pengukuran terhadap 4 merk PC yang berbeda menunjukan bahwa nilai beban non linier yang dihasilkan mengalami

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Henao-Muñoz, Andrés C., Javier G. Herrera-Murcia, and Andrés J. Saavedra-Montes. "Experimental characterization of compact fluorescent lamps for harmonic analysis of power distribution systems." TecnoLógicas 21, no. 42 (2018): 79–94. http://dx.doi.org/10.22430/22565337.780.

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The modeling of a compact fluorescent lamp for harmonic analysis under terminal voltage variation is presented in this paper. The compact fluorescent lamp is represented with the diode bridge rectifier model, which is commonly used for harmonic analysis. The set of parameters is estimated for different values of the terminal voltage applied to the lamp. The equations to estimate the parameters and the required measurements to calculate them are presented. To characterize the lamp an experiment is carried out varying the RMS terminal voltage from 10 V to 131.6 V and for each terminal voltage va

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Žnidarec, Matej, Zvonimir Klaić, Damir Šljivac, and Boris Dumnić. "Harmonic Distortion Prediction Model of a Grid-Tie Photovoltaic Inverter Using an Artificial Neural Network." Energies 12, no. 5 (2019): 790. http://dx.doi.org/10.3390/en12050790.

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Expanding the number of photovoltaic (PV) systems integrated into a grid raises many concerns regarding protection, system safety, and power quality. In order to monitor the effects of the current harmonics generated by PV systems, this paper presents long-term current harmonic distortion prediction models. The proposed models use a multilayer perceptron neural network, a type of artificial neural network (ANN), with input parameters that are easy to measure in order to predict current harmonics. The models were trained with one-year worth of measurements of power quality at the point of commo

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Torbus, Sławomir Andrzej, and Jacek Andrzej Michalski. "Testing of a Polarimetric Current Sensor in the Frequency Domain." Sensors 21, no. 9 (2021): 3008. http://dx.doi.org/10.3390/s21093008.

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This paper proposes an original model of a polarimetric current sensor, in which the measuring coil was made of a single mode telecommunication optical fiber ITU-T G.652, G.653, G.655, and G.657. This sensor was subjected to the commercialization process, which was carried out by a company combining the functionality of a technology transfer center with the capabilities of the Startit Fund Sp. z o.o. The published results included the analysis of the implementation readiness, the analysis of the market potential, the valuation of the industrial property rights of the invention and indicated fu

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Mujovic, Sasa, Slobodan Djukanovic, Vladan Radulovic, and Vladimir A. Katic. "Multi-parameter mathematical model for determination of PC cluster total harmonic distortion of input current." COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 35, no. 1 (2016): 305–25. http://dx.doi.org/10.1108/compel-03-2015-0149.

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Purpose – Low power devices with switched-mode power supply represent harmonic generating apparatus in widespread use nowadays. The influence of personal computers (PCs), which affect the supply voltage, is considered. Harmonic level due to simultaneous PC operation is quantified by the total harmonic distortion of input current (THD I ). The purpose of this paper is to propose a multi-parameter mathematical model for the THD I calculation. The model is convenient for practical engineering application. Design/methodology/approach – The model is derived using the measured and simulated data. Th

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Adegboye, B. A., and M. G. Mele. "Investigating the Quality of Power Supply to a Large Commercial Installation." Advanced Materials Research 367 (October 2011): 159–65. http://dx.doi.org/10.4028/www.scientific.net/amr.367.159.

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The paper investigates the quality of power supply to the Corporate Headquarters of the Power Holding Company of Nigeria (PHCN), PLC, Maitama, Abuja. This was facilitated by the measurements conducted using the harmonitor 3000 power analyzer on the secondary terminals of the two (2) 1000kVA, 11kV three-phase transformers serving the Company. The data on the network consisting of voltages, currents, power factor and harmonic distortion were acquired by the Harmonitor. Analysis of these data shows that there is significantly high variation between the minimum and the maximum voltage and that the

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Giner-Sanz, J. J., E. M. Ortega, and V. Pérez-Herranz. "Optimization of the Perturbation Amplitude for EIS Measurements Using a Total Harmonic Distortion Based Method." Journal of The Electrochemical Society 165, no. 10 (2018): E488—E497. http://dx.doi.org/10.1149/2.1021810jes.

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P. Monteiro, Flávia, Suzane A. Monteiro, Maria E. Tostes, and Ubiratan H. Bezerra. "Using True RMS Current Measurements to Estimate Harmonic Impacts of Multiple Nonlinear Loads in Electric Distribution Grids." Energies 12, no. 21 (2019): 4132. http://dx.doi.org/10.3390/en12214132.

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Currently, for analyzing harmonic impacts on voltage at a point of interest, due to multiple nonlinear loads, the literature recommends carrying out simultaneous and synchronized measurement campaigns in all suspicious points with the use of high cost energy quality analyzers that are usually not available at the customers’ facilities and very often also not at the electric utilities. To overcome this drawback this paper proposes a method of assessing the harmonic impact due to multiple nonlinear loads on the total voltage harmonic distortion using only the load current true RMS values which a

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Li, Lan, Xiao Xia Cao, and Yong Yang. "Tracking Performance Optimization of Compensation Current in Active Power Filter." Applied Mechanics and Materials 291-294 (February 2013): 2234–39. http://dx.doi.org/10.4028/www.scientific.net/amm.291-294.2234.

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The compensation principle of active power filter is analyzed，and the measurement method of harmonic and reactive current based on instantaneous reactive power theory is proposed．In the control methods of compensation current，aiming at the limitation of PI controller in compensation performance of active power filter，repetitive control is introduced in the tracking control of instruction current，and compound control strategy composed with PI controller and repetitive controller is adopted to affect the output of system．The system model based on compound control strategy is built and simulated

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Nandi, R., Mousiki Kar, and Sagarika Das. "Electronically Tunable Dual-Input Integrator Employing a Single CDBA and a Multiplier: Voltage Controlled Quadrature Oscillator Design." Active and Passive Electronic Components 2009 (2009): 1–5. http://dx.doi.org/10.1155/2009/835789.

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A new dual-input differential input active integrator using a current differencing buffered amplifier (CDBA) is proposed. A multiplier element is appropriately used in the circuit whose control voltage (Vc) tunes the integrator time constant (τ) electronically. The design of a voltage controlled quadrature oscillator (VCQO) based on the proposed integrator had been satisfactorily implemented. A new type of measurement for the tuning error of the oscillator based on the Nyquist plot is presented that shows an error of only 2% atfo≈1 MHz with Total Harmonic Distortion (THD) less than 3%.

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Ocampo-Hidalgo, Juan Jesus, Iván Vázquez-Álvarez, Sergio Sandoval-Perez, Rodolfo Garcia-Lozano, Marco Gurrola-Navarro, and Jesus Ezequiel Molinar-Solis. "A CMOS Micro-power, Class-AB “Flipped” Voltage Follower using the quasi floating-gate technique." Ingeniería e Investigación 37, no. 2 (2017): 82–88. http://dx.doi.org/10.15446/ing.investig.v37n2.62625.

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This paper presents the design and characterization of a new analog voltage follower for low-voltage applications. The main idea is based on the “Flipped” Voltage Follower and the use of the quasi-floating gate technique for achieving class AB operation. A test cell was simulated and fabricated using a 0,5 μm CMOS technology. When the proposed circuit is supplied with VDD = 1,5 V, it presents a power consumption of only 413 μW. Measurement and experimental results show a gain bandwidth product of 10 MHz and a total harmonic distortion of 1,12 % at 1 MHz.

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Janardana, I. G. N., I. W. Arta Wijaya, and I. N. Karnata Mataram. "Effect Of Value Of Resistance Announcement To Thd In Electrical System Faculty Of Engineering University Udayana Denpasar." Journal of Electrical, Electronics and Informatics 2, no. 1 (2018): 21. http://dx.doi.org/10.24843/jeei.2018.v02.i01.p05.

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AC (Air Conditioner), TV, lamp, LCD and others are categorized as nonlinear load generating harmonics. The high content of harmonics has a negative impact on the quality of electrical power. The result of measurement of THD (Total Harmonic Distortion) current at 9 ohm ground resistance value at phase R = 9,8%, phase S = 11,0%, phase T = 7,5% exceed from standard value IEEE 519 Year 2014 equal to ? 5 , 0%, THD measurement of phase voltage R = 1.4%, phase S = 1.2%, phase T = 1.3%, meet the maximum THDv standard of ? 5%. To overcome this problem, it was observed the effect of the value of ground

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Kowalski, Tomasz, Gian Piero Gibiino, Jaroslaw Szewinski, Pawel Barmuta, Piotr Bartoszek, and Pier Andrea Traverso. "Design, characterisation, and digital linearisation of an ADC analogue front-end for gamma spectroscopy measurements." ACTA IMEKO 10, no. 2 (2021): 70. http://dx.doi.org/10.21014/acta_imeko.v10i2.1042.

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<p class="Abstract">This work presents the design, experimental characterisation, and digital post-distortion (i.e., digital linearisation) of a MHz-range ADC analogue front-end prototype for a gamma radiation spectrometry system under development at the National Center for Nuclear Research (NCBJ) in Poland. The design accounts for the electrical response of the gamma particle detector in providing signal conditioning and ADC protection against high-voltage spikes due to occasional high-energy cosmic radiation, as well as proper ADC clocking. As the front-end inevitably introduces nonlin

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Adi Wirajaya, I. Putu, I. Wayan Rinas, and I. Wayan Sukerayasa. "Studi Analisa Pengaruh Total Harmonic Distortion (THD) terhadap Rugi-Rugi, Efisiensi, dan Kapasitas Kerja Transformator pada Penyulang Kerobokan." Jurnal SPEKTRUM 6, no. 2 (2019): 121. http://dx.doi.org/10.24843/spektrum.2019.v06.i02.p17.

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Kerobokan feeder supply electrical energy in the area of Kerobokan. This feeder supplies 67 distribution transformers that serve a variety of customers with nonlinier electrical loads. Nonlinier electrical loads cause harmonics which adversely affect customers and power system equipment, especially distribution transformers. In Kerobokan feeder, only 3 (4.5%) of the 67 transformers has THDi content that according with the IEEE 519-2014 standard and 64 (95.5%) of the 67 transformers has a high THDi content and exceed the IEEE 519-2014 standard. For this reason, the power losses, efficiency, and

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Vanin, Valery, Alexandr Bulychov, Maxim Popov, Olga Vasilyeva, and Maria Shakhova. "Measurement of currents and voltages non-sinusoidal parameters in power supply systems with rectifier load." MATEC Web of Conferences 245 (2018): 06007. http://dx.doi.org/10.1051/matecconf/201824506007.

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The use of frequency-controlled electric drives in industry and municipal services is accompanied by the problem of their negative impact on the distribution network. As examples, the results of measurements of power quality indices in the power supply system of an oil producing enterprise and on the supply input of a railway traction substation are given. It is shown that the voltage subgroup total harmonic distortions (THDS) can exceed their rated permitted values in 100% of the measurement time.

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Andrejevic-Stosovic, Miona, Marko Dimitrijevic, Slobodan Bojanic, Octavio Nieto-Taladriz, and Vanco Litovski. "Characterization of nonlinear loads in power distribution grid." Facta universitatis - series: Electronics and Energetics 29, no. 2 (2016): 159–75. http://dx.doi.org/10.2298/fuee1602159a.

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Electronic devices are complex circuits, consisting of analog, switching, and digital subsystems that require direct current (DC) for polarization. Since they are connected to the mains delivering alternating current (AC), however, AC-to-DC converters are to be introduced between the mains and the electronics to be fed. A converter is an electric circuit containing several subsystems, the most important being the switch-mode power supply, drawing power from the mains in pulses hence it is highly nonlinear. That happens, in reduced amplitude, even when the electronics to be fed is switched off.

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Giner-Sanz, J. J., E. M. Ortega, and V. Pérez-Herranz. "Optimization of the Perturbation Amplitude for Impedance Measurements in a Commercial PEM Fuel Cell Using Total Harmonic Distortion." Fuel Cells 16, no. 4 (2016): 469–79. http://dx.doi.org/10.1002/fuce.201500141.

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Aydogan, Alper, Fatih Atalar, Aysel Ersoy Yilmaz, and Pawel Rozga. "Using the Method of Harmonic Distortion Analysis in Partial Discharge Assessment in Mineral Oil in a Non-Uniform Electric Field." Energies 13, no. 18 (2020): 4830. http://dx.doi.org/10.3390/en13184830.

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In high-voltage equipment, it is vital to detect any failure in advance. To do this, a determination of the partial discharges occurring at different voltage types as well as at different electrode configurations is essential for observing the oil condition. In this study, an experimental setup consisting of a needle–semi-sphere electrode configuration immersed in mineral oil is prepared for laboratory experiment. In such a way, a non-uniform electric field is created and the leakage currents are monitored from the grounded electrode. A total of six different electrode configurations are analy

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Zhang, Jinyong, Shing-Chow Chan, Hui Li, Nannan Zhang, and Lei Wang. "An Area-Efficient and Highly Linear Reconfigurable Continuous-Time Filter for Biomedical Sensor Applications." Sensors 20, no. 7 (2020): 2065. http://dx.doi.org/10.3390/s20072065.

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This paper proposes a compact, high-linearity, and reconfigurable continuous-time filter with a wide frequency-tuning capability for biopotential conditioning. It uses an active filter topology and a new operational-transconductance-amplifier (OTA)-based current-steering (CS) integrator. Consequently, a large time constant τ , good linearity, and linear bandwidth tuning could be achieved in the presented filter with a small silicon area. The proposed filter has a reconfigurable structure that can be operated as a low-pass filter (LPF) or a notch filter (NF) for different purposes. Based on the

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You, Kiheum, Seung-Hwan Kim, and Hojong Choi. "A Class-J Power Amplifier Implementation for Ultrasound Device Applications." Sensors 20, no. 8 (2020): 2273. http://dx.doi.org/10.3390/s20082273.

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In ultrasonic systems, power amplifiers are one of the most important electronic components used to supply output voltages to ultrasonic devices. If ultrasonic devices have low sensitivity and limited maximum allowable voltages, it can be quite challenging to detect the echo signal in the ultrasonic system itself. Therefore, the class-J power amplifier, which can generate high output power with high efficiency, is proposed for such ultrasonic device applications. The class-J power amplifier developed has a power efficiency of 63.91% and a gain of 28.16 dB at 25 MHz and 13.52 dBm input. The pul

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Naji, Hamood, Noureddine Harid, and Huw Griffiths. "Enhancement of DUBAL Network Operational Performance Using Resistive High Temperature Superconducting Fault Current Limiter." Energies 12, no. 15 (2019): 3007. http://dx.doi.org/10.3390/en12153007.

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Power systems under expansion suffer from escalating fault levels that impact equipment integrity, operational flexibility, and the overall security of the system. The fault current limiter (FCL) is one of approaches used by utilities to limit fault current levels and in Dubai Aluminum (DUBAL) series current limiting reactors are currently used. However, more effective (FCL) topologies are sought and, in this paper, a case study is proposed using resistive high temperature superconducting fault current limiters (HT-SFCLs). The application of HT-SCFLs is aimed here at reducing short-circuit cur

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Chang, En Chih, Rong Ching Wu, Guan Yu Chen, Pei Shan Wang, and Kuo Yuan Liao. "Digital Measurement and Control Technology of Grey Predictor-Based Inverse Hyperbolic Sliding Function for Solar PV Inverters." Applied Mechanics and Materials 870 (September 2017): 323–28. http://dx.doi.org/10.4028/www.scientific.net/amm.870.323.

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This paper develops a digital measurement and control technology of grey predictor-based inverse hyperbolic sliding function for solar PV inverters. The advantage of inverse hyperbolic sliding function (IHSF) is very low sensitivity to system uncertainties. However, when a large parameter variation or a sudden external load interference is applied, the steady-state errors still occur in the IHSF controlled solar PV inverter and incur high total harmonic distortion (THD), even deteriorate control accuracy. To eliminate steady-state errors, a grey predictor is used for the prediction of voltage

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Hong, Chih-Yuan, Lan-Yuen Guo, Rong Song, Mark L. Nagurka, Jia-Li Sung, and Chen-Wen Yen. "Developing a Low-Cost Force Treadmill via Dynamic Modeling." Journal of Healthcare Engineering 2017 (2017): 1–9. http://dx.doi.org/10.1155/2017/9875471.

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By incorporating force transducers into treadmills, force platform-instrumented treadmills (commonly called force treadmills) can collect large amounts of gait data and enable the ground reaction force (GRF) to be calculated. However, the high cost of force treadmills has limited their adoption. This paper proposes a low-cost force treadmill system with force sensors installed underneath a standard exercise treadmill. It identifies and compensates for the force transmission dynamics from the actual GRF applied on the treadmill track surface to the force transmitted to the force sensors underne

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Ramli, Zalifah, Jafferi Jamaludin, Nasrudin Abd Rahim, and Saaidal Razalli Azzuhri. "Capacitor Voltage Balancing with Online Controller Performance-Based Tuning for a Switch-Sharing-Based Multilevel Inverter." Applied Sciences 11, no. 10 (2021): 4428. http://dx.doi.org/10.3390/app11104428.

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Switch-sharing-based multilevel inverters offer great advantages in terms of efficiency improvement and output quality enhancement for low-power photovoltaic (PV) applications. However, the capacitor voltage balancing issue may critically deteriorate the output voltages, and thus could nullify the aforementioned benefits. Hence, this paper proposes a capacitor voltage balancing solution based on a buck-boost converter with performance-based tuning controllers to address the issue. The proposed controllers are designed based on the proportional-integral (PI) configuration equipped with an onlin

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Prokop, Roman, Roman Sotner, and Vilem Kledrowetz. "The CMOS Highly Linear Current Amplifier with Current Controlled Gain for Sensor Measurement Applications." Sensors 20, no. 16 (2020): 4653. http://dx.doi.org/10.3390/s20164653.

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This paper introduces a new current-controlled current-amplifier suitable for precise measurement applications. This amplifier was developed with strong emphasis on linearity leading to low total harmonic distortion (THD) of the output signal, and on linearity of the gain control. The presented circuit is characterized by low input and high output impedances. Current consumption is significantly smaller than with conventional quadratic current multipliers and is comparable in order to the maximum processed input current, which is ±200 µA. This circuit is supposed to be used in many sensor appl

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Gnanavel, C., and S. Albert Alexander. "Experimental Validation of an Eleven Level Symmetrical Inverter Using Genetic Algorithm and Queen Bee Assisted Genetic Algorithm for Solar Photovoltaic Applications." Journal of Circuits, Systems and Computers 27, no. 13 (2018): 1850212. http://dx.doi.org/10.1142/s0218126618502122.

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This paper presents an 11-level symmetrical inverter with reduced number of semiconductor switches for the solar photovoltaic (PV) applications. The genetic algorithm (GA) and queen bee assisted genetic algorithm (QBAGA) are performing a major task for the proposed Multilevel Inverter (MLI). The proposed symmetrical MLI topology has reduced number of semiconductor devices compared to the conventional MLI. However, the modulation index threshold related to the drop in the number of inverter output voltage levels is higher than that of the MLI. The objective of this paper is to find the optimal

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Huang, Mingfei, Yongting Deng, Hongwen Li, Jing Liu, Meng Shao, and Qiang Fei. "Torque Ripple Suppression of PMSM Based on Robust Two Degrees-of-Freedom Resonant Controller." Energies 14, no. 4 (2021): 1015. http://dx.doi.org/10.3390/en14041015.

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This paper concentrates on a robust resonant control strategy of a permanent magnet synchronous motor (PMSM) for electric drivers with model uncertainties and external disturbances to improve the control performance of the current loop. Firstly, to reduce the torque ripple of PMSM, the resonant controller with fractional order (FO) calculus is introduced. Then, a robust two degrees-of-freedom (Robust-TDOF) control strategy was designed based on the modified resonant controller. Finally, by combining the two control methods, this study proposes an enhanced Robust-TDOF regulation method, named a

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Adegboye, B. A. "Power Quality Assessment in a Distribution Network." Advanced Materials Research 62-64 (February 2009): 53–59. http://dx.doi.org/10.4028/www.scientific.net/amr.62-64.53.

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The paper explores power quality disturbances on a specified section of the distribution network of a Textile Industry in Kaduna State of Nigeria. The 33kV PHCN incoming to the industry is stepped down to 11kV by a 7.5MVA, 33/11kV three-phase transformer. This transformer supplies various 11/.415kV transformers present in the distribution network. Another 11kV PHCN incoming is used in event of any failure from the 33/11kV transformer. The paper focuses on Transformer No. 1, a 150kVA, 11/.415kV three-phase transformer operating at 0.9 power factor, located at printing and dying (P/D) building 1

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