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자료유형
학술저널
저자정보
Shulong Tan (Tsinghua University) Hua Geng (Tsinghua University) Geng Yang (Tsinghua University)
저널정보
전력전자학회 JOURNAL OF POWER ELECTRONICS JOURNAL OF POWER ELECTRONICS Vol.16 No.6
발행연도
2016.11
수록면
2,338 - 2,349 (12page)

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초록· 키워드

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This paper presents an impedance-matching-based control scheme for the harmonic resonance damping of multiple grid-connected-converters (GCCs) with LCL filters. As indicated in this paper, harmonic resonance occurs if a GCC possesses an output impedance that is not matched with the rest of the network in some specific frequency bands. It is also revealed that the resonance frequency is associated with the number of GCCs, the grid impedance and even the capacitive loads. By controlling the grid-side current instead of the converter-side current, the critical LCL filter is restricted as an internal component. Thus, the closed-loop output impedance of the GCC within the filter can be configured. The proposed scheme actively regulates the output impedance of the GCC to match the impedance of the external network, based on the detected resonance frequency. As a result, the resonance risk of multiple GCCs can be avoided, which is beneficial for the plug-and-play property of the GCCs in microgrids. Simulation and experimental results validate the effectiveness of the proposed method.

목차

Abstract
Ⅰ. INTRODUCTION
Ⅱ. MODELING AND STABILITY ANALYSIS
Ⅲ. INVESTIGATION ON THE RESONANCES IN MICROGRIDS
Ⅳ. PROPOSED IMPEDANCE-MATCHING-BASED METHOD
Ⅴ. SIMULATION AND EXPERIMENT VERIFICATIONS
Ⅵ. CONCLUSIONS
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UCI(KEPA) : I410-ECN-0101-2017-560-001586261