弱电网下LCL逆变器阻尼谐振抑制与功率快速调节方法

doi:10.19595/j.cnki.1000-6753.tces.170432

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Abstract

For weak grids installed at remote areas, the grid-impedance variation and grid-frequencyfluctuation affectthe resonance peak suppressionand active/reactive power distributed accuracy respectively. In this paper, a LCL damping resonance suppression and fast power regulation method is proposed, which includes robust grid-current-feedback active damping control(RGCFAD), synchronous reference frame quasi-proportional-integral control(SRFQPI) and fast power regulation. The proposedRGCFAD control enhancesthe system’s damping characteristicsand damps well the LCL-resonance peak regardless of the grid impedance variation. The activepower feed-forward and fast reactive power detection can speed up the system response and compensate load reactive power. The proposed SRFQPI control reduces the influence of the fundamental frequency fluctuation and enhances the overall robustness of the whole system. The stability margin and dynamic response of the overall system are analyzed in detail, and the proper parameters are selected without complicated trial. Finally, Simulation and experimental results have verified the proposedcontrol and design strategies.

Key words： Grid-connected inverter LCL filter active damping resonance suppression power regulation

Received: 14 April 2017 Published: 13 June 2018

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TM464

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	Chen Yandong
	Wang Yi
	ZhouLeming
	Zhou Xiaoping
	Xie Zhiwei

Cite this article:

Chen Yandong,Wang Yi,ZhouLeming等. Damping Resonance Suppression and Fast Power Regulation Methodfor LCL-Type Inverter under Weak Grid[J]. Transactions of China Electrotechnical Society, 2018, 33(11): 2564-2574.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.170432 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I11/2564

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