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		Wei ZHAO,An LUO,Ke PENG,Xia DENG.[en_title][J].Control Theory and Technology,2009,7(1):77~.[Copy]

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WeiZHAO,AnLUO,KePENG,XiaDENG
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Received:February 02, 2007Revised:March 17, 2008

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Current control for a shunt hybrid active power filter using recursive integral PI

Wei ZHAO, An LUO, Ke PENG, Xia DENG

(College of Electrical and Information Engineering, Hunan University, Changsha Hunan 410082, China)

Abstract:

This paper presents a current control method for a shunt hybrid active power filter (HAPF) using recursive integral PI algorithm. The method improves the performance of the HAPF system by reducing the influence of detection accuracy, time delay of instruction current calculation and phase displacement of output filter. Fuzzy logic based set-point weighing algorithm is combined in the control scheme to enhance its robustness and anti-interference ability. The proposed algorithm is easy to implement for engineering applications and easy to compute. Experiment results have verified the validity of the proposed controller. Furthermore, the proposed recursive integral PI algorithm can also be applied in the control of periodic current as in AC drivers.

Key words: Power electronics Shunt hybrid active power filter Recursive integral PI Fuzzy inference