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Optimum and Adjustable Damping Control of Grid-Connected Inverter with an LCL Filter
Toshiji Kato,Kaoru Inoue,Yusuke Akiyama,Koki Ohashi 전력전자학회 2015 ICPE(ISPE)논문집 Vol.2015 No.6
This paper proposes a simple and general active damping method with good suppression effects by the optimal control principle with the state feedback approach. It may reduce number of sensors by estimations with a state observer. The proposed method can enhance the damping effects by adjustment of control parameters which correspond to a sort of virtual resistors. Its general design method and examples are described. The regulated current error transfer-functions at the oscillation frequency of the filter are suppressed effectively by validation through simulation by SABER and experiment by a DSP-based digital control system.