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ZHENG Zheng,TIAN Shike,ZHANG Guopeng.Current-limiting Strategy for Current Reconstruction of Shunt Active Power Filter with Specified Sub-harmonic Compensation[J].JOURNAL OF POWER SUPPLY,2018,16(5):59-66
Current-limiting Strategy for Current Reconstruction of Shunt Active Power Filter with Specified Sub-harmonic Compensation
Received:August 24, 2016  Revised:February 13, 2018
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DOI:10.13234/j.issn.2095-2805.2018.5.59
Keywords:shunt active power filter (SAPF)  specified sub-harmonic  current reconstruction  current-limiting  slid-ing window iterative FFT
Fund Project:Key scientific research projects of Henan Province(13150045)
        
AuthorInstitutionEmail
ZHENG Zheng School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo , China
TIAN Shike School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo , China 956360677@qq.com
ZHANG Guopeng School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo , China
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Abstract:
      When the specified sub-harmonic compensation of active power filter(APF) is performed, the load harm-onic current jump will result in over-current of APF. In this paper, a current-limiting strategy for the reconstruction of harmonic current is proposed based on the traditional proportional current-limiting of shunt active power filter(SAPF). First, the amplitude and phase of the specified sub-harmonic current are obtained using the sliding window iterative FFT analysis under this strategy. Then, the compensated harmonic current is reconstructed by the superposition of the specified sub-harmonic current, and the product of the reconstructed current and the proportional coefficient is used as a new reference current for the control of SAPF. This method can make full use of the compensation capability of SAPF, thus realizing the accurate current-limiting of SAPF and ensuring its safe operation beyond the compensation capacity of the system. Simulation and experimental results verified the validity and effectiveness of the propose method.
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