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논문 기본 정보

자료유형
학술저널
저자정보
Liaoyuan Lin (Zhejiang University) Qian Guo (China Jiliang University) Zhihong Bai (Zhejiang University) Hao Ma (Zhejiang University)
저널정보
전력전자학회 JOURNAL OF POWER ELECTRONICS JOURNAL OF POWER ELECTRONICS Vol.17 No.1
발행연도
2017.1
수록면
282 - 293 (12page)

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초록· 키워드

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There exists a strong coupling between real and reactive power owing to the complex impedances in droop based islanded microgrids (MGs). The existing virtual impedance methods consider improvements of the impedance matching for sharing of the voltage controlled power (VCP) (reactive power for Q-V droop, and real power for P-V droop), which yields a 1-DOF (degree of freedom) tunable virtual impedance. However, a weak impedance matching for sharing of the frequency controlled power (FCP) (real power for P-ω droop, and reactive power for Q-ω droop) may result in FCP overshoots and even oscillations during load transients. This in turn results in VCP oscillations due to the strong coupling. In this paper, a 2-DOF tunable adaptive virtual impedance method considering impedance matching for both real and reactive power (IM-PQ) is proposed to improve the power sharing performance of MGs. The dynamic response is promoted by suppressing the coupled power oscillations and power overshoots while realizing accurate power sharing. In addition, the proposed power sharing controller has a better parametric adaptability. The stability and dynamic performances are analyzed with a small-signal state-space model. Simulation and experimental results are presented to investigate the validity of the proposed scheme.

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Abstract
I. INTRODUCTION
II. ANALYSIS OF POWER SHARING BASED ON IMPEDANCE REGULATION
III. PROPOSED POWER SHARING SCHEME
IV. IMPEDANCE ANALYSIS AND MODELING
V. SIMULATION AND EXPERIMENTAL RESULTS
VI. CONCLUSIONS
REFERENCES

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UCI(KEPA) : I410-ECN-0101-2017-560-002047890