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Journal articles on the topic 'Multiple harmonic sources'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

M., H. Jopri, R. Abdullah A., Manap M., Sutikno T., and R. Ab. Ghani M. "An Identification of Multiple Harmonic Sources in a Distribution System by Using Spectrogram." Bulletin of Electrical Engineering and Informatics 7, no. 2 (2018): 244–56. https://doi.org/10.11591/eei.v7i2.1188.

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The identification of multiple harmonic sources (MHS) is vital to identify the root causes and the mitigation technique for a harmonic disturbance. This paper introduces an identification technique of MHS in a power distribution system by using a time-frequency distribution (TFD) analysis known as a spectrogram. The spectrogram has advantages in term of its accuracy, a less complex algorithm, and use of low memory size compared to previous methods such as probabilistic and harmonic power flow direction. The identification of MHS is based on the significant relationship of spectral impedances,

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2

Liu, Shaojie, Yingying Zhao, Yue Tian, Yubo Fan, and Jifang Ye. "Research on Supraharmonics Suppression Strategy of Distribution Network based on Dynamic Cooperative Control of Multiple Harmonic Sources." Journal of Physics: Conference Series 2488, no. 1 (2023): 012047. http://dx.doi.org/10.1088/1742-6596/2488/1/012047.

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Abstract In view of the increasing number of supraharmonic sources in distribution network and the increasing distortion of power grid waveform, a strategy of supraharmonic suppression in distribution network based on dynamic coordinated control of multi-harmonic sources is proposed. The characteristic harmonic current components related to carrier frequency in the output current of each supraharmonic source are shifted by several angles through carrier phase shifting, so that the total current harmonics of all supraharmonic sources merged into point of common coupling (PCC) are obviously redu

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3

Hjertberg, Tommy, and Sarah K. Rönnberg. "Identifying Harmonic Sources by Profiling Discrete Harmonic Cycle Time." Energies 18, no. 4 (2025): 853. https://doi.org/10.3390/en18040853.

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Harmonic emissions cause power quality issues in electrical systems, making source identification necessary to determine the best way of remedying them. Existing methods rely on measuring variations in harmonic amplitude, angle, and phase which require multiple measurement points or extensive system knowledge. We identified a methodological research gap because Discrete Harmonic Cycle Time (DHCT) has not been evaluated as a measuring principle for harmonic source identification. We propose a method using DHCT to enable single point measurements to profile harmonic sources. To determine the cyc

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Pessentheiner, Hannes, Martin Hagmuller, and Gernot Kubin. "Localization and Characterization of Multiple Harmonic Sources." IEEE/ACM Transactions on Audio, Speech, and Language Processing 24, no. 8 (2016): 1348–63. http://dx.doi.org/10.1109/taslp.2016.2556282.

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Jopri, M. H., A. R. Abdullah, M. Manap, M. R. Yusoff, T. Sutikno, and M. F. Habban. "An Improved of Multiple Harmonic Sources Identification in Distribution System with Inverter Loads by Using Spectrogram." International Journal of Power Electronics and Drive Systems (IJPEDS) 7, no. 4 (2016): 1355. http://dx.doi.org/10.11591/ijpeds.v7.i4.pp1355-1365.

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This paper introduces an improved of multiple harmonic sources identification that been produced by inverter loads in power system using time-frequency distribution (TFD) analysis which is spectrogram. The spectrogram is a very applicable method to represent signals in time-frequency representation (TFR) and the main advantages of spectrogram are the accuracy, speed of the algorithm and use low memory size such that it can be computed rapidly. The identification of multiple harmonic sources is based on the significant relationship of spectral impedances which are the fundamental impedance (Z1)

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Kuralkar, Vaishali P., Prabodh Khampariya, and Shashikant M. Bakre. "A Survey on the Investigation and Analysis for a Power System (Micro-Grid) with Stochastic Harmonic Distortion of Multiple Converters." NeuroQuantology 20, no. 5 (2022): 86–99. http://dx.doi.org/10.14704/nq.2022.20.5.nq22151.

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The current study is based on a survey on the exploration and analysis of stochastic harmonic distortion in power systems using multiple converters (Micro-Grid). When Renewable Energy Systems are integrated into EPS, they may create clean energy, fulfill consumer energy needs, and help to protect fossil fuel supplies, which are rapidly dwindling. These renewable energy sources (RES) are frequently connected to the grid via power converters (Voltage Source Converters) to provide the necessary energy regulation and conversion. However, Voltage Source Converter (VSCs) generates both current and v

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7

H. Jopri, M., A. R. Abdullah, M. Manap, T. Sutikno, and M. R. Ab Ghani. "An Identification of Multiple Harmonic Sources in a Distribution System by Using Spectrogram." Bulletin of Electrical Engineering and Informatics 7, no. 2 (2018): 244–56. http://dx.doi.org/10.11591/eei.v7i2.1188.

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Abstract:

The identification of multiple harmonic sources (MHS) is vital to identify the root causes and the mitigation technique for a harmonic disturbance. This paper introduces an identification technique of MHS in a power distribution system by using a time-frequency distribution (TFD) analysis known as a spectrogram. The spectrogram has advantages in term of its accuracy, a less complex algorithm, and use of low memory size compared to previous methods such as probabilistic and harmonic power flow direction. The identification of MHS is based on the significant relationship of spectral impedances,

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8

Huang, Cong Hui, Chia Hung Lin, Chung Chi Huang, and Chia Hung Wang. "Using Wavelet Hybrid Self-Organizing Feature Map Network for V-I Based Multiple Harmonic Sources Classification." Applied Mechanics and Materials 764-765 (May 2015): 545–49. http://dx.doi.org/10.4028/www.scientific.net/amm.764-765.545.

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This paper proposes a method using non-linear voltage-current characteristics for multiple harmonic sources classification using wavelet hybrid neural network (WHNN). Typical voltage-current characteristics of harmonic sources are non-linear closed curves in the time-domain, referring to the converters, reactors, and non-linear loads. The hybrid neural network is a two-subnetwork architecture, consisting of wavelet layer and a self-organizing feature map (SOFM) network connected in cascade. The effectiveness of the proposed method is demonstrated by numerical tests. The results of multiple har

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9

M., Hatta Jopri, Rahim Abdullah A., Manap Mustafa, Rahimi Yusoff M., and Sutikno Tole. "A Fast Localization of Multiple Harmonic Sources for Rectifier Loads by Utilizing Periodogram." TELKOMNIKA Telecommunication, Computing, Electronics and Control 15, no. 1 (2017): 71–78. https://doi.org/10.12928/TELKOMNIKA.v15i1.3120.

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This paper introduces a fast method to localize the multiple harmonic sources (MHS) for rectifier based loads in power distribution system by utilizing periodogram technique with a single-point measurement approach at the point of common coupling (PCC). The periodogram is a fast and accurate technique for analyzing and distinguishing MHS location in power system. Matlab simulation is carried out several unique cases on IEEE test feeder cases due to validate the proposed method. The identification of MHS location is based on the significant relationship of spectral impedance which are fundament

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10

de Oliveira, Mateus M., Leandro R. M. Silva, Igor D. Melo, Carlos A. Duque, and Paulo F. Ribeiro. "Independent Component Analysis-Based Harmonic Transfer Impedance Estimation for Networks with Multiple Harmonic Sources." Energies 18, no. 1 (2024): 85. https://doi.org/10.3390/en18010085.

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This paper presents a novel methodology to estimate the harmonic transfer impedances in electric power systems with multiple harmonic sources (HSs). The purpose is to determine the responsibility of each HS for the total harmonic distortion at a specific bus within the system, addressing a critical issue in the power quality field. To achieve this objective, it is necessary to estimate not only the individual HS, but also the transfer impedances between each source and the bus under analysis (BUA). Most methods for solving this problem are based on proper network modeling or restrict variation

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11

Ivry, P. M., O. A. Oke, D. W. P. Thomas, and M. Sumner. "Predicting Harmonic Distortion of Multiple Converters in a Power System." Journal of Electrical and Computer Engineering 2017 (2017): 1–10. http://dx.doi.org/10.1155/2017/7621413.

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Various uncertainties arise in the operation and management of power systems containing Renewable Energy Sources (RES) that affect the systems power quality. These uncertainties may arise due to system parameter changes or design parameter choice. In this work, the impact of uncertainties on the prediction of harmonics in a power system containing multiple Voltage Source Converters (VSCs) is investigated. The study focuses on the prediction of harmonic distortion level in multiple VSCs when some system or design parameters are only known within certain constraints. The Univariate Dimension Red

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Bharani Prakash, T., and R. Sankar Ganesh. "Harmonic Minimization in Grid Coupled Photovoltaic Structures Using Selective Harmonic Elimination Pulse-Width Modulation in Multiple Level Series Linked Nano-Scale Double Gate Hetero-Structure MOSFET Based H Type Bridge Inverters." Journal of Nanoelectronics and Optoelectronics 17, no. 1 (2022): 128–35. http://dx.doi.org/10.1166/jno.2022.3178.

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Semiconductor Chip makers and semiconductor device designers denote that, a reliable device should have a character with high speed and low power loss in its operation, which could be done in a nano-scale regime. A nano-scale double gate hetero-structure MOSFET based multilevel inverter is a power electronic arrangement system that generates multilevel output voltage with lower harmonic distortion and reduced power switching loss. In a grid-connected photovoltaic device, this power electronic inverter is a critical and essential component. Series coupled H-bridge multilayered inverter is a wid

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13

Hartana, R. K., and G. G. Richards. "Optimum filter design for distribution feeders with multiple harmonic sources." Electric Power Systems Research 23, no. 2 (1992): 103–13. http://dx.doi.org/10.1016/0378-7796(92)90057-8.

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14

Peiris, Kasun, Sean Elphick, Jason David, and Duane Robinson. "Impact of Multiple Grid-Connected Solar PV Inverters on Harmonics in the High-Frequency Range." Energies 17, no. 11 (2024): 2639. http://dx.doi.org/10.3390/en17112639.

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In recent years, integration of solar photovoltaic (PV) systems into distribution networks has been increasing rapidly, as it has become the most promising renewable energy source (RES) in the transition of power generation from centralised to decentralised systems. With the power electronic (PE) interfaces that use high-frequency internal switching, all renewable energy sources are considered to be harmonic emitters, especially near switching frequencies, i.e., above 2 kHz. This paper evaluates the behaviour of high-frequency harmonics in the 2–20 kHz range due to the parallel operation of mu

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15

Daniel, Kamran, Lauri Kütt, Muhammad Naveed Iqbal, Noman Shabbir, Hadi Ashraf Raja, and Muhammad Usman Sardar. "A Review of Harmonic Detection, Suppression, Aggregation, and Estimation Techniques." Applied Sciences 14, no. 23 (2024): 10966. http://dx.doi.org/10.3390/app142310966.

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The rapid growth of power electronics-based devices, such as electric vehicles and renewable energy systems, has introduced nonlinear components into power systems, generating high-frequency harmonics that distort current and voltage waveforms. These distortions pose significant risks to the stability of power grids, potentially leading to equipment malfunctions, reduced efficiency, and even system failures. To address these challenges, advanced harmonic detection, suppression, and estimation techniques are required to ensure the reliable operation of modern power systems. This paper comprehen

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Mohd, Hatta Jopri, Rahim Abdullah Abdul, Karim Rony, Nikolovski Srete, Sutikno Tole, and Manap Mustafa. "Accurate harmonic source identification using S-transform." TELKOMNIKA Telecommunication, Computing, Electronics and Control 18, no. 5 (2020): 2708~2717. https://doi.org/10.12928/TELKOMNIKA.v18i5.5632.

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This paper introduces the accurate identification of harmonic sources in the power distribution system using time-frequency distribution (TFD) analysis, which is S-transform. The S-transform is a very applicable method to represent signals parameters in time-frequency representation (TFR) such as TFR impedance (ZTFR) and the main advantages of S-transform it can provide better frequency resolution for low frequency components and also offers better time resolution for high-frequency components. The identification of multiple harmonic sources are based on the significant relationship of spectra

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17

Hu, Yonggang, Wei Wang, Zehong Gu, Tianpeng Mao, Xuchen Zhu, and Jiabao Jin. "Closed-form multiple source direction-of-arrival estimator under reverberant environments." Journal of the Acoustical Society of America 154, no. 4 (2023): 2349–64. http://dx.doi.org/10.1121/10.0021873.

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Accurate direction-of-arrival (DOA) estimation of multiple sources, simultaneously active in a reverberant environment, remains a challenge, as the multi-path acoustic reflections and overlapped periods dramatically distort the direct-path wave propagation. This article proposes a prominent solution localizing multiple sources in a reverberant environment using closed-form estimates, circumventing any exhaustive search over the two-dimensional directional space. Apart from a low complexity cost, the algorithm has robustness to reverberant, inactive, and overlapped periods and an ease of operat

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18

Kaprielian, S. R., A. E. Emanuel, R. V. Dwyer, and H. Mehta. "Predicting voltage distortion in a system with multiple random harmonic sources." IEEE Transactions on Power Delivery 9, no. 3 (1994): 1632–38. http://dx.doi.org/10.1109/61.311200.

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19

Kumar, Ashwani, Biswarup Das, and Jaydev Sharma. "Determination of location of multiple harmonic sources in a power system." International Journal of Electrical Power & Energy Systems 26, no. 1 (2004): 73–78. http://dx.doi.org/10.1016/j.ijepes.2003.08.004.

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20

Rojas, Christian A., Samir Kouro, Ruben Inzunza, Yasuaki Mitsugi, and Abraham M. Alcaide. "Harmonic Impedance Model of Multiple Utility-Interactive Multilevel Photovoltaic Inverters." Energies 15, no. 24 (2022): 9462. http://dx.doi.org/10.3390/en15249462.

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An important requirement of the power grid with high penetration of renewable energy sources is the mitigation of potential harmonic interactions between different distributed large grid-tie inverters and the mains. This work presents the harmonic interaction between multiple multilevel photovoltaic (PV) inverters based on the well-known T-type neutral-point-clamped inverter (3L-TNPC). The multiple 3L-TNPC is connected in parallel to a common ac bus by using distribution voltage feeders. The analysis is performed by using the Norton equivalence model of each power circuit, its admittance matri

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21

Hu, Yonggang, Tianpeng Mao, Hewen Wei, Siliang Niu, Wei Wang, and Xuchen Zhu. "Multiple source direction-of-arrival estimation applicable under near-, far-, and mixed-field scenarios." Journal of the Acoustical Society of America 155, no. 5 (2024): 2919–33. http://dx.doi.org/10.1121/10.0025856.

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Traditionally, direction-of-arrival (DOA) estimations under near- and far-field scenarios are treated as independent tasks based on the corresponding acoustic model, hence necessitating a proper soundfield detector as an upstream processing tool, whereas there may not be a distinct boundary between different soundfield types, especially the mixed-field scenarios where both near- and far-field sources coexist simultaneously. To handle this issue, this article investigates a multisource DOA estimator that equally localizes multiple near-, far-, and mixed-field sources, not requiring any speciali

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22

Antonov, Alexander I., Dmitry Yu Rudy, and Konstantin V. Khatsevsky. "Study of the quality of electric power in electric networks with semiconductor converters." Yugra State University Bulletin 19, no. 1 (2023): 123–30. http://dx.doi.org/10.18822/byusu202301123-130.

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At present, semiconductor converters have found wide application in the electric power industry [6]. One of the most common semiconductor converters is a frequency converter, as it provides a three-phase voltage with adjustable frequency from a three-phase mains voltage. However, it, like other semiconductor converters, is the cause of the appearance of harmonics and, as a result, the non-sinusoidal shape of the voltage curve [1]. Harmonics are the cause of such negative effects in the electrical network as concomitant heating of the windings of motors, transformers, etc., false alarms in dist

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23

A.S., Hussin, Abdullah A.R., Jopri M.H., Sutikno T., Saad N.M., and Tee Weihown. "Harmonic Load Diagnostic Techniques and Methodologies: A Review." Indonesian Journal of Electrical Engineering and Computer Science 9, no. 3 (2018): 690–95. https://doi.org/10.11591/ijeecs.v9.i3.pp 690-695.

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This paper will review on the existing techniques and methodologies of harmonic load diagnostic system. The increasingly amount of harmonic producing load used in power system are the main contribution in quantifying each harmonic disturbance effects of the multiple harmonic producing loads and it became very important. Literature proposes two different techniques and methods on the harmonic source identification under the soft computing technique classification. The advantages and disadvantages of harmonic load identification techniques and methods are discussed in this paper. In the proposed

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24

Xiang, Ning, and Christopher Landschoot. "Bayesian Inference for Acoustic Direction of Arrival Analysis Using Spherical Harmonics." Entropy 21, no. 6 (2019): 579. http://dx.doi.org/10.3390/e21060579.

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This work applies two levels of inference within a Bayesian framework to accomplish estimation of the directions of arrivals (DoAs) of sound sources. The sensing modality is a spherical microphone array based on spherical harmonics beamforming. When estimating the DoA, the acoustic signals may potentially contain one or multiple simultaneous sources. Using two levels of Bayesian inference, this work begins by estimating the correct number of sources via the higher level of inference, Bayesian model selection. It is followed by estimating the directional information of each source via the lower

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Mobley, Frank S., Alan T. Wall, Steven C. Campbell, and Reese Rasband. "Construction of interpolated source from dynamic flights (UAV/AAM Special Issue)." Noise Control Engineering Journal 71, no. 6 (2023): 405–12. http://dx.doi.org/10.3397/1/377136.

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A previous comparison of far-field predictions from equivalent acoustic sources generated from dynamic flight measurements of small unmanned aircraft systems demonstrated that a single pass over an acoustic array was insufficient to accurately predict far-field acoustic levels. In effort to reduce the uncertainty in the current study, measurements of multiple passes of dynamic flight within finite engine speed/airspeed bins were combined. From these measurements, equivalent acoustic sources were decomposed using spherical harmonics fitted to levels depropagated on a spherical surface. Two sour

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26

Jopri, M. Hatta, A. Rahim Abdullah, Mustafa Manap, M. Rahimi Yusoff, and Tole Sutikno. "A Fast Localization of Multiple Harmonic Sources for Rectifier Loads by Utilizing Periodogram." TELKOMNIKA (Telecommunication Computing Electronics and Control) 15, no. 1 (2017): 71. http://dx.doi.org/10.12928/telkomnika.v15i1.3120.

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27

Ujile, Awajiokiche, and Zhengtao Ding. "A dynamic approach to identification of multiple harmonic sources in power distribution systems." International Journal of Electrical Power & Energy Systems 81 (October 2016): 175–83. http://dx.doi.org/10.1016/j.ijepes.2016.02.038.

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28

Wang, Yue, Yonggang Li, Yinan Yang, et al. "A gray-box harmonic resonance frequency identification method of multiple-inverter-fed power system oriented to system designers." Wind Engineering 46, no. 2 (2021): 545–55. http://dx.doi.org/10.1177/0309524x211037918.

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This paper presents a gray-box harmonic resonance frequency identification method of multiple-inverter-fed power system, which enables modal analysis oriented to system designers based on only frequency response data provided by diverse vendors or measured by frequency scanning. First, admittance transfer functions of all grid-connected inverters (GCIs) are fitted using Matrix Pencil Method-Vector Fitting (MPM-VF) combined method. Then, node admittance matrix (NAM) is formed according to the topology of whole system. Finally, harmonic resonance frequency along with changes in number of GCIs ar

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29

Du, Yang, and Ma. "Multi-Harmonic Source Localization Based on Sparse Component Analysis and Minimum Conditional Entropy." Entropy 22, no. 1 (2020): 65. http://dx.doi.org/10.3390/e22010065.

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Aiming at the fact that the independent component analysis algorithm requires more measurement points and cannot solve the problem of harmonic source location under underdetermined conditions, a new method based on sparse component analysis and minimum conditional entropy for identifying multiple harmonic source locations in a distribution system is proposed. Under the condition that the network impedance is unknown and the number of harmonic sources is undetermined, the measurement node configuration algorithm selects the node position to make the separated harmonic current more accurate. The

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30

Fernando, Rashen, Manan Mittal, Yongjie Zhuang, Ryan M. Corey, and Andrew C. Singer. "Physics informed sound field interpolation using an acoustic sensor network." Journal of the Acoustical Society of America 155, no. 3_Supplement (2024): A276. http://dx.doi.org/10.1121/10.0027490.

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Sound field estimation is the process of analyzing and characterizing the distribution of sound waves in a particular physical space. The applications of sound field estimation extend to various areas, including the visualization of acoustic fields, interpolation of room impulse responses, identification of sound sources, capturing sound fields for spatial audio, and spatial active noise control, among other potential uses. In a previous study, a directionally weighted kernel has been used to estimate the sound field, where the priori information of source directions is employed to improve the

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31

Hussin, A. S., A. R. Abdullah, M. H. Jopri, T. Sutikno, N. M. Saad, and Weihown Tee. "Harmonic Load Diagnostic Techniques and Methodologies: A Review." Indonesian Journal of Electrical Engineering and Computer Science 9, no. 3 (2018): 690. http://dx.doi.org/10.11591/ijeecs.v9.i3.pp690-695.

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<p>This paper will review on the existing techniques and methodologies of harmonic load diagnostic system. The increasingly amount of harmonic producing load used in power system are the main contribution in quantifying each harmonic disturbance effects of the multiple harmonic producing loads and it became very important. Literature proposes two different techniques and methods on the harmonic source identification under the soft computing technique classification. The advantages and disadvantages of harmonic load identification techniques and methods are discussed in this paper. In the

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32

Godbole, Prachi, and Sincy George. "A Novel Algorithm for Optimal Harmonic Load Flow including Harmonic Compensation." Engineering, Technology & Applied Science Research 13, no. 1 (2023): 10093–99. http://dx.doi.org/10.48084/etasr.5475.

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Load flow analysis is widely used for finding voltage at various parts of a large, interconnected power system. The exponential increase in the use of power electronic devices and the noticeable percentage of integration of renewable energy sources in modern power systems result in the occurrence of non-sinusoidal voltages at various parts of the power system. By reformation of the Newton-Raphson load flow method, a few harmonic load flow algorithms have been developed for modern transmission systems. However, for larger transmission systems, complexity and heavy computational burden are often

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Dai, Wei, and Huawei Chen. "Multiple Speech Sources Localization in Room Reverberant Environment Using Spherical Harmonic Sparse Bayesian Learning." IEEE Sensors Letters 3, no. 2 (2019): 1–4. http://dx.doi.org/10.1109/lsens.2018.2890129.

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Saxena, D., Sayak Bhaumik, and S. N. Singh. "Identification of Multiple Harmonic Sources in Power System Using Optimally Placed Voltage Measurement Devices." IEEE Transactions on Industrial Electronics 61, no. 5 (2014): 2483–92. http://dx.doi.org/10.1109/tie.2013.2270218.

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Moradifar, Amir, Asghar Akbari Foroud, and Khalil Gorgani Firouzjah. "Comprehensive identification of multiple harmonic sources using fuzzy logic and adjusted probabilistic neural network." Neural Computing and Applications 31, S1 (2017): 543–56. http://dx.doi.org/10.1007/s00521-017-3022-8.

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Shanono, Ibrahim Haruna, Nor Rul Hasma Abdullah, and Aisha Muhammad. "9-Level Single DC Voltage Source Inverter Controlled Using Selective Harmonic Elimination." International Journal of Power Electronics and Drive Systems (IJPEDS) 9, no. 3 (2018): 1251. http://dx.doi.org/10.11591/ijpeds.v9.i3.pp1251-1262.

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<p>This paper presents an efficient cascaded H-bridge inverter topology that is controlled using an optimized selective harmonic elimination pulse width modulation technique. The switching angles are obtained by solving the nonlinear transcendental equation with the aid of genetic algorithm optimization method. Unlike the usual H-bridge converter topologies that require multiple individual direct current (DC) sources and additional switching components per voltage step, the proposed topology utilizes a single DC source to supply two full-bridge modules. The modified topology employs a ca

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A., Arikesh, and K. Parvathy A. "Modular multilevel inverter for renewable energy applications." International Journal of Electrical and Computer Engineering (IJECE) 10, no. 1 (2020): 1–14. https://doi.org/10.11591/ijece.v10i1.pp1-14.

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This paper proposes a Multilevel Inverter (MLI) which focuses on two objective, minimal voltage sources and lesser switching component. The proposed Asymmetrical Cascaded Multilevel Inverter (ACMLI) is able to achieve the objective by selectively opting the voltage level of DC sources chosen and implementing the mathematical operation of addition and subtraction on the DC sources. This system also utilizes multiple carrier sinusoidal pulse width modulation technique (MCS-PWM) for operating the switches. It is found that the number of switches required for proposed modular bridge ACMLI and modi

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Almalaisi, Taha Abdulsalam, Noor Izzri Abdul Wahab, Hussein I. Zaynal, et al. "Optimization of Harmonic Elimination in PV-Fed Asymmetric Multilevel Inverters Using Evolutionary Algorithms." International Journal of Robotics and Control Systems 5, no. 2 (2025): 902–16. https://doi.org/10.31763/ijrcs.v5i2.1785.

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Modern power electronics depend heavily on Multilevel Inverters (MLIs) to drive high-power systems operating in renewable energy systems electric vehicles along with industrial motor drives. MLIs create AC signals of high quality by joining multiple DC voltage sources which leads to minimal harmonic distortion outputs. The Cascaded H-Bridge MLI (CHB-MLI) stands out as a first choice among different topologies of MLI for photovoltaic (PV) applications because it includes modular features with fault tolerance capabilities and excellent multi-DC source integration. To achieve effective operation

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Antunes, Hélio Marcos André, Ramon Ravani Del Piero, and Sidelmo Magalhães Silva. "Application of Repetitive Control to Grid-Forming Converters in Centralized AC Microgrids." Energies 18, no. 13 (2025): 3427. https://doi.org/10.3390/en18133427.

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The electrical grid is undergoing increasing integration of decentralized power sources connected to the low-voltage network. In this context, the concept of a microgrid has emerged as a system comprising small-scale energy sources, loads, and storage devices, coordinated to operate as a single controllable entity capable of functioning in either grid-connected or islanded mode. The microgrid may be organized in a centralized configuration, such as a master-slave scheme, wherein the centralized converter, i.e., the grid-forming converter (GFC), plays a pivotal role in ensuring system stability

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Nakamoto, Kyle T., Trevor M. Shackleton, and Alan R. Palmer. "Responses in the Inferior Colliculus of the Guinea Pig to Concurrent Harmonic Series and the Effect of Inactivation of Descending Controls." Journal of Neurophysiology 103, no. 4 (2010): 2050–61. http://dx.doi.org/10.1152/jn.00451.2009.

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One of the fundamental questions of auditory research is how sounds are segregated because, in natural environments, multiple sounds tend to occur at the same time. Concurrent sounds, such as two talkers, physically add together and arrive at the ear as a single input sound wave. The auditory system easily segregates this input into a coherent percept of each of the multiple sources. A common feature of speech and communication calls is their harmonic structure and in this report we used two harmonic complexes to study the role of the corticofugal pathway in the processing of concurrent sounds

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Weng, Liuqing, Xiyu Song, Zhenghong Liu, et al. "DOA Estimation of Indoor Sound Sources Based on Spherical Harmonic Domain Beam-Space MUSIC." Symmetry 15, no. 1 (2023): 187. http://dx.doi.org/10.3390/sym15010187.

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The Multiple Signal Classification (MUSIC) algorithm has become one of the most popular algorithms for estimating the direction-of-arrival (DOA) of multiple sources due to its simplicity and ease of implementation. Spherical microphone arrays can capture more sound field information than planar arrays. The collected multichannel speech signals can be transformed from the space domain to the spherical harmonic domain (SHD) for processing through spherical modal decomposition. The spherical harmonic domain MUSIC (SHD-MUSIC) algorithm reduces the dimensionality of the covariance matrix and achiev

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John, Malte, and Axel Mertens. "Frequency-Domain Modeling of Harmonic Interactions in Voltage-Source Inverters with Closed-Loop Control." Energies 13, no. 21 (2020): 5823. http://dx.doi.org/10.3390/en13215823.

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Power electronic converters, together with their loads, sources, and controls, form a coupled system that includes many nonlinear interactions, for instance due to pulse-width modulation (PWM) and feedback control. In this paper we develop a complete, nonlinear modeling approach for voltage-source inverters in the frequency domain, taking into account the harmonic components introduced into the system from the inputs and from the nonlinear digital PWM. The most important contribution is a method for analyzing how these harmonics propagate through the nonlinear system in steady state. To enable

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43

Arulappan, Annai Theresa Alphonse, Malathi Selvaraj, and Ambikapathy Aladian. "SHE PWM based 21 level inverters with hardware analysis." International Journal of Power Electronics and Drive Systems (IJPEDS) 15, no. 2 (2024): 993. http://dx.doi.org/10.11591/ijpeds.v15.i2.pp993-1000.

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Recently, the advancement of multilevel inverters (MLI) has been a crucial factor in high power and medium voltage applications. This MLI has multiple topologies and has been used in a variety of applications. Cascaded MLI is preferred over other forms of multilevel inverter topologies. Nonetheless, significant obstacles are encountered when implementing these topologies. They necessitate an increased number of switches, DC sources, capacitors, and diodes. Increased losses and total harmonic distortion (THD) will be present in the system. In addition, the MLI is more expensive. The better cons

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44

Arulappan, Annai Theresa Alphonse, Malathi Selvaraj, and Ambikapathy Aladian. "SHE PWM based 21 level inverters with hardware analysis." International Journal of Power Electronics and Drive Systems (IJPEDS) 15, no. 2 (2024): 993–1000. https://doi.org/10.11591/ijpeds.v15.i2.pp993-1000.

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Abstract:

Recently, the advancement of multilevel inverters (MLI) has been a crucial factor in high power and medium voltage applications. This MLI has multiple topologies and has been used in a variety of applications. Cascaded MLI is preferred over other forms of multilevel inverter topologies. Nonetheless, significant obstacles are encountered when implementing these topologies. They necessitate an increased number of switches, DC sources, capacitors, and diodes. Increased losses and total harmonic distortion (THD) will be present in the system. In addition, the MLI is more expensive. The better cons

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45

Yaqoob, Muhammad Tayyab, Mohd Khairil Rahmat, Siti Marwangi Mohamad Maharum, and Mazliham Mohd Su’ud. "A Review on harmonics elimination in real time for cascaded H-bridge multilevel inverter using particle swarm optimization." International Journal of Power Electronics and Drive Systems (IJPEDS) 12, no. 1 (2021): 228. http://dx.doi.org/10.11591/ijpeds.v12.i1.pp228-240.

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Renewable energy has a great importance for power generation as it does not use the fossils fuels. Energy generated from alternative energy sources are weather dependent. To generate a continuous power to meet the load requirements, Battery energy storage system are used. Power conversion process must be much efficient as possible to convert the DC stored energy into AC. This conversion process is usually done by the help of inverters. This paper gives the brief overview on three main categories of multilevel inverter like cascaded h-bridge, neutral point clamped and flying capacitor multileve

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46

Muhammad, Tayyab Yaqoob, Khairil Rahmat Mohd., Marwangi Mohamad Maharum Siti, and Mohd. Su'ud Mazliham. "A Review on harmonics elimination in real time for cascaded H-bridge multilevel inverter using particle swarm optimiza." International Journal of Power Electronics and Drive System (IJPEDS) 12, no. 1 (2021): 228–40. https://doi.org/10.11591/ijpeds.v12.i1.pp228-240.

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Abstract:

Renewable energy has a great importance for power generation as it does not use the fossils fuels. Energy generated from alternative energy sources are weather dependent. To generate a continuous power to meet the load requirements, Battery energy storage system are used. Power conversion process must be much efficient as possible to convert the DC stored energy into AC. This conversion process is usually done by the help of inverters. This paper gives the brief overview on three main categories of multilevel inverter like cascaded h-bridge, neutral point clamped and flying capacitor multileve

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47

Hudson, R., A. Y. Chikhani, G. Ferland, D. R. Smith, and M. M. A. Salama. "Modelling the interaction of multiple small harmonic current sources in an isolated power distribution system." Canadian Journal of Electrical and Computer Engineering 20, no. 2 (1995): 85–90. http://dx.doi.org/10.1109/cjece.1995.7102029.

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Hu, Hejun, Junjia Wang, Rui Guan, Hui Chen, Junchuo Luo, and Yiyun Huang. "Research on resonance mechanism of the nuclear fusion electrical distribution network under multiple harmonic sources." Electric Power Systems Research 233 (August 2024): 110451. http://dx.doi.org/10.1016/j.epsr.2024.110451.

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Liu, Xuan, Yutao Tang, Yang Li, Zixian Hu, Junhong Deng, and Guixin Li. "Continuous amplitude control of second harmonic waves from the metasurfaces through interference paths." Applied Physics Letters 121, no. 11 (2022): 111701. http://dx.doi.org/10.1063/5.0105386.

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Nonlinear plasmonic metasurfaces represent a promising platform for generating and controlling the multiple degrees of freedom of harmonic waves at the subwavelength scale. Among various functionalities, the amplitude control of the harmonic waves is usually achieved by varying the fundamental frequency and the pumping power. However, these kinds of methods lack the ability to control the energy distributions of the nonlinear waves at different diffraction orders. Here, we report the continuous intensity control of the harmonic waves from the plasmonic metasurfaces through interference paths.

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Thakur, Shikha, and Sneha Singh. "Counting and Localization of Multiple Unknown Harmonic Sound Sources in Entire 3D Space Using Just Five Microphones." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 268, no. 6 (2023): 2963–72. http://dx.doi.org/10.3397/in_2023_0428.

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Counting and localization of multiple sound sources in an unknown environment has many applications, namely fault diagnosis of complex machineries, hearing aids' development, and localization of enemy vehicles in defense. However, multiple sound source localization is extremely challenging because it requires numerous microphones, which increases the cost, computational time, and installation difficulties. Here, we present a new method to count the number of stationary harmonic sound sources and localize them in a free-field environment using a novel oblique square pyramid shaped array of only

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