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| An Improved Method of SAPF for Harmonic Compensation and Resonance Damping with Detected Current Including Power Capacitor and Load Current |
| Zhang Yuxiao1, Dai Ke1, Chen Xinwen1, Zhang Sanhong2, Kang Yong1 |
1. State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan 430074 China;
2. Central China Grid Company Limited Wuhan 430077 China |
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Abstract Firstly, this paper presents a hybrid compensation system with shunt active power filter (SAPF) and power capacitors. However, parallel resonance between inductive grid impedance and capacitive impedance will occur in this system. With traditional method, hybrid system is stable when capacitor current is not included in the detected current. But, when capacitor current is included, the detected current will be amplified and resonance frequency will be shifted to higher frequency. Then, an improved method that reversing part of SAPF compensation reference current whose spectra higher than resonance frequency is proposed. Points of common coupling (PCC) voltage is also detected for resonance damping which is helpful to mitigate harmonic distortion. At last, simulation and experiment results are presented to verify the proposed method.
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Received: 19 August 2016
Published: 14 September 2017
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2017, Vol. 32 
