http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Quoc Nam Trinh,Peng Wang,Fok Hoong Choo,Chi Jin,XueWei Pan,Hong Hee Lee 전력전자학회 2015 ICPE(ISPE)논문집 Vol.2015 No.6
This paper proposes a novel control strategy for smooth transition between stand-alone and gridconnected modes of distributed generation (DG). The proposed control scheme is designed in stationary (α-β) reference frame consisted of outer grid current control loop using a proportional resonant (PR) controller and the inner load voltage control loop developed with a repetitive controller (RC). The proposed control strategy is able to produce a sinusoidal load voltage in stand-alone mode and a sinusoidal grid current in grid-connected operation of the DG despite the presence of nonlinear local load. One unified control scheme is developed for both stand-alone and gridconnected operations so that the DG does not need to change control scheme and voltage or current spikes can be effectively prevented during transition period. Since the control system is developed in the α-β reference frame, coordinate transformations are not required, which can significantly reduce the complexity and improve the accuracy of the DG control system. The feasibility of the proposed method is validated through selected simulated and experimental results.