功率因数与电压跌落深度双影响因子下中压H桥链式动态电压恢复器的滤波器优化设计

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Abstract The medium-voltage cascaded H-bridge dynamic voltage restorer (DVR) is embedded into the grid in series for suppressing voltage sags.The parameter selection of the LC filter in the DVR is a key factor which decides the cost and volume of the DVR.Therefore,the paper discusses the requirement of the LC filter in the medium-voltage cascaded H-bridge DVR systematically,then derives boundary conditions of the inductance and the capacitance,and analyzes parameter variations under different conditions of voltage sags depth and power factors.Finally,an optimized design method of the LC filter is proposed for the medium-voltage cascaded H-bridge DVR with the consideration of double impact factors.The LC filter optimization procedure of the 10 kV/2 MW DVR prototype is presented in detail,and the validity is demonstrated by the simulation in Matlab/Simulink and experimental results in static and dynamic test.

Key words： Dynamic voltage restorer cascaded H-bridge LC filter double impact factors

Received: 21 June 2014 Published: 07 July 2016

PACS:	TM714
	TM464

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	Chen Guodong
	Zhu Miao
	Cai Xu

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Chen Guodong,Zhu Miao,Cai Xu. Optimization of Filter Based on Power Factor and Voltage Sag Depth for Medium-Voltage Cascaded H-Bridge Dynamic Voltage Restorer[J]. Transactions of China Electrotechnical Society, 2016, 31(9): 75-84.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2016/V31/I9/75

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