并联有源滤波器LCL滤波器特性分析及设计方法

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摘要基于频域分析的方法,本文研究了并联有源滤波器中LCL滤波系统的特性,着重讨论了不同负载条件对滤波系统的影响。其中感性负载与空载情况类似,容性负载会引入新的谐振峰,阻性负载会增加系统的阻尼比,而在谐波源负载时对滤波系统的模型进行了改进,滤波器输出电流的幅值和相位都将发生改变。基于以上分析,本文提出一种系统的LCL滤波器设计方法,包含总连接电抗值、阻尼比、开关噪声衰减度、谐振频率四组约束条件。根据滤波器的设计目标,合理确定系统的阻尼比,再通过反推校正的方法优化滤波器的性能。仿真和实验证明了本文所提出的LCL滤波系统分析及设计方法的正确性及适用性。

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	侯睿
	武健
	徐殿国

关键词 ：并联有源滤波器, LCL滤波器, 阻尼比, 谐振

Abstract：In this paper, with the frequency-domain analysis method, characteristics of LCL filter in shunt active power filter are researched and the impact on filter system in different load conditions is focused heavily on. Conditions of inductive load are similar to that of no load, and capacitive load will inducte another resonant peak, and resistive load can increase system’s damping ratio. While in the conditions of harmonic source, with the improved filter system model, amplitude and phase of filter output current will change. Based on the above analysis, a systemic LCL filter design method is presented, which comprises four groups of constraints such as total connection reactance value, damping ratio, attenuation rate of switching noise and resonant frequency. Using this method, a proper damping ratio of system is required according to the design goals of the filter, and the filter performance can be optimized by back-stepping correction. Simulation and experiment results demonstrate the validity and applicability of the proposed method.

Key words： Shunt active power filter LCL filter damping ratio resonance

收稿日期: 2012-09-20 出版日期: 2014-11-05

PACS:	TM761
	TM48

作者简介: 侯睿男,1984年生,博士研究生,研究方向为无功补偿和谐波抑制。武健男,1979年生,博士,讲师,研究方向为无功补偿和谐波抑制。

引用本文:

侯睿, 武健, 徐殿国. 并联有源滤波器LCL滤波器特性分析及设计方法[J]. 电工技术学报, 2014, 29(10): 191-198. Hou Rui, Wu Jian, Xu Dianguo. Characteristics and Design Methods of LCL Filter in Shunt Active Power Filter. Transactions of China Electrotechnical Society, 2014, 29(10): 191-198.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2014/V29/I10/191

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