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Open AccessArticle

Research on Harmonic Current Amplification Effect of Parallel APF Compensating Voltage Source Nonlinear Load

1
College of Geophysics and Information Engineering, China University of Petroleum-Beijing, Beijing 102249, China
2
School of Automation, Wuhan University of Technology, Wuhan 430081, China
*
Author to whom correspondence should be addressed.
Energies 2019, 12(16), 3070; https://doi.org/10.3390/en12163070
Received: 10 June 2019 / Revised: 10 July 2019 / Accepted: 26 July 2019 / Published: 9 August 2019
(This article belongs to the Special Issue Advanced Techniques for Electronic Power and Energy Systems)
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Abstract

A parallel active power filter (APF) is generally used to suppress dynamic harmonic current and compensate reactive power in the grid. However, parallel APF may have a negative effect on the load current when compensating the nonlinear load of a voltage source type, which may lead to the amplification effect of the load harmonic current. In this paper, the fundamental causes of harmonic current amplification were analyzed by studying the harmonic current amplification effect when a parallel APF compensates a nonlinear load. According to the results of the theoretical derivation, a feasible method to limit this current amplification effect by changing the system structure and the APF’s own control was proposed, and the corresponding design scheme is given. Finally, the correctness of the theoretical derivation of the harmonic current amplification effect and the feasibility of the proposed solution were proven through simulation and experiment. View Full-Text
Keywords: parallel active power filter (APF); harmonic current amplification effect; compensation parallel active power filter (APF); harmonic current amplification effect; compensation
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Wei, X.; Li, C.; Qi, M.; Luo, B.; Deng, X.; Zhu, G. Research on Harmonic Current Amplification Effect of Parallel APF Compensating Voltage Source Nonlinear Load. Energies 2019, 12, 3070.

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