Journal Article 三相電力用アクティブフィルタの直流コンデンサ電圧変動の過渡解析と抑制

萬年, 智介  ,  Mannen, Tomoyuki  ,  藤田, 英明  ,  Fujita, Hideaki

135 ( no. 6 )  , pp.718 - 724 , 2015-06 , Institute of Electrical Engineering in Japan , 電気学会
This paper proposes a new control method for three-phase active power filters to reduce the dc capacitor voltage fluctuations caused by a quick load change. The new control method introduces a new k-step compensator, which maintains the mean active power at zero every 1/(k-1) ac line period. Therefore, the compensator can suppress the transient voltage fluctuations across the dc capacitor, even when a quick load change occurs. This paper theoretically reveals the relationship between the step number k and the reduction of the dc voltage fluctuations. The experimental setup introducing the proposed 7-step compensator exhibits good suppression of the dc voltage fluctuations and makes it possible to reduce the required capacitance of the dc capacitor by a factor of seven.

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