계통연계형 인버터의 전류제어기법 성능 비교
Performance comparison study of current control methods for grid connected inverters
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초록
본 논문에서는 계통연계형 인버터(Grid-connected inverter, GCI) 시스템을 위한 전류 제어 방법들의 성능 비교 연구를 제시한다. GCI 시스템을 위해 다양한 전류 제어 방법이 개발되었으며 각 제어기마다 장점과 한계를 가지고 있다. 본 논문에서는GCI 전류 제어기들의 정상 상태 및 과도 상태에서의 동적 성능을 비교 분석한다. 제안한 전향보상기법(Command feedforwardcontrol, CFFC) 및 외란제거제어(Disturbance rejection control, DRC)가 모든 GCI 전류 제어기에 적용 전과 후의 성능을 비교 분석하였다. 제안된 CFFC와 DRC 제어 알고리즘을 주파수 영역에서 분석하고 성능 검증을 위해 각 GCI 전류 제어 방법들의 시뮬레이션 및 실험 모델을 개발하였다.
Abstract
This paper presents performance comparison study of current control methods for grid connected inverter (GCI) system. Different current control methods have been developed for GCI systems and each controller has its own advantages andlimitations. Steady state and transient dynamic performance of the GCI current controllers are compared in this paper. The performance of the proposed command feedforward control (CFFC) and disturbance rejection control (DRC) isanalyzed before and after application to all GCI current controllers. The proposed CFFC and DRC control algorithms isanalyzed in a frequency domain and the simulation and experiment models of each GCI current control methods aredeveloped for verification of the performance.
참고문헌 (10)
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