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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2019.5
- 수록면
- 1,885 - 1,891 (7page)
이용수
초록· 키워드
오류제보하기
Transformerless grid-connected inverters, due to their advantages in high efficiency, small volume and light weight, gain more research and interest in recent years. Due to the asymmetrical driving signal in pulse-width-modulation (PWM) caused by time-delay, zero-drift of the current sensors and imparities of the power transistors, etc. Output of the grid current contains dc component. As a result, power quality of the grid is degraded. In this paper, a dc component suppression scheme with recursive integral PI controller are introduced, according to the change tendency of tracking error, the coefficients of PI controller are regulated by BP neural network in real time, and the global optimization requirements are met. Sliding-Window-Double-Iteration-Method (SWDIM) is utilized for fast dc current extraction. Simulation results from a 2-kW three-phase grid-connected inverter confirm the effectiveness of the proposed scheme.
목차
Abstract
I. INTRODUCTION
II. IMPACTS OF TIME-DELAY,SCALING ERRORS OF SENSORS,UNBALANCED VOLTAGE ON GRID CURRENT PERFORMANCE
III. PROPOSED DC COMPONENT SUPPRESSION SCHEME USING RECURSIVE INTEGRAL PI-REPETITIVE CONTROL BASED ON BP NEURAL NETWORK
IV. SIMULATION RESULTS
V. CONCLUSIONS
REFERENCES
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