并网接口滤波器拓扑结构推演与分析

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Abstract Grid-interfacing filter that is usually adopted to mitigate switching frequency harmonics introduced by pulse width modulation procedure has a significant influence on inverter system performance, volume and cost. Based on in-depth analysis of harmonic attenuation characteristics of L, LCL and LLCL filters, a unified circuit model of grid-interfacing filter is proposed in this paper. Through topology deduction and performance comparisons of the five-order and the following filters, two new filters, LLCCL1 and LLCCL2 filters, are developed. Mitigations of the high frequency harmonics from the inverter side, suppressions of the high frequency harmonics from the grid side, design methods of filter parameters and passive damping of the resonance peaks are comprehensively investigated and compared among different types of filter structures. Theoretical analysis and simulation results are presented to demonstrate the correctness of the proposed new LLCCL1 and LLCCL2 filters as well as the effectiveness of the addressed deduction methods of filter topologies.

Key words： Grid-interfacing filter filter topology harmonic attenuation characteristics harmonic suppression characteristics filter parameter design passive damping

Received: 01 October 2013 Published: 13 April 2015

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TM46

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	Articles by authors
	Xu Dezhi
	Wang Fei
	Ruan Yi
	Mao Hualong
	Zhang Wei
	Yang Ying

Cite this article:

Xu Dezhi,Wang Fei,Ruan Yi等. Topology Deduction and Analysis of Grid-Interfacing Filters[J]. Transactions of China Electrotechnical Society, 2015, 30(4): 15-25.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2015/V30/I4/15

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