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논문 기본 정보

자료유형
학술저널
저자정보
Qian Guo (Zhejiang University) Hongyan Wu (Zhejiang University) Liaoyuan Lin (Zhejiang University) Zhihong Bai (Zhejiang University) Hao Ma (Zhejiang University)
저널정보
전력전자학회 JOURNAL OF POWER ELECTRONICS JOURNAL OF POWER ELECTRONICS Vol.16 No.1
발행연도
2016.1
수록면
329 - 339 (11page)

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초록· 키워드

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Owing to mismatched feeder impedances in an islanded microgrid, the conventional droop control method typically results in errors in reactive power sharing among distributed generation (DG) units. In this study, an improved droop control strategy based on secondary voltage control is proposed to enhance the reactive power sharing accuracy in an islanded microgrid. In a DG local controller, an integral term is introduced into the voltage droop function, in which the voltage compensation signal from the secondary voltage control is utilized as the common reactive power reference for each DG unit. Therefore, accurate reactive power sharing can be realized without any power information exchange among DG units or between DG units and the central controller. Meanwhile, the voltage deviation in the microgrid common bus is removed. Communication in the proposed strategy is simple to implement because the information of the voltage compensation signal is broadcasted from the central controller to each DG unit. The reactive power sharing accuracy is also not sensitive to time-delay mismatch in the communication channels. Simulation and experimental results are provided to validate the effectiveness of the proposed method.

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Abstract
I. INTRODUCTION
II. ANALYSIS OF THE HIERARCHICAL CONTROL SCHEME FOR MICROGRIDS
III. PROPOSED REACTIVE POWER SHARING STRATEGY
IV. SIMULATION AND EXPERIMENTAL RESULTS
V. CONCLUSION
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UCI(KEPA) : I410-ECN-0101-2016-560-002315473