电网技术 2010, 34(1) 73-78 DOI:     ISSN: 1000-3673 CN: 11-2410/TM

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本文关键词相关文章
有源滤波器
滞环电流控制
开关损耗
谐波治理
滞环宽度
本文作者相关文章
PubMed
有源滤波器的低损耗滞环电流控制方法
曾江,刘艳,叶小军,余涛
华南理工大学 电力学院,广东省 广州市 510640
摘要

提出一种新的用于有源滤波器的低损耗滞环电流控制方法。利用有源滤波器的输出电流主要是谐波电流,因此在一个周期内总的三相电流绝对值大小波动幅度很大的特点,根据电流大小调节相应的开关次数,从而在保持相同控制精度的同时,大幅降低有源滤波器的开关损耗。在理论上推导了最优开关频率和电流范数波动幅度的关系,设计了一个新的滞环电流控制器。仿真结果表明,采用所提出的方法可在保持总的控制精度的同时有效降低总的开关损耗。

关键词 有源滤波器   滞环电流控制   开关损耗   谐波治理   滞环宽度  
A Novel Hysteresis Current Control Method for Active Power Filter With Low Switching Loss
ZENG Jiang ,LIU Yan ,YE Xiao-jun ,YU Tao
School of Electric Power, South China University of Technology, Guangzhou 510640, Guangdong Province, China
Abstract:

A novel hysteresis current control method for active power filter (APF) with low switching loss is proposed. By use of the feature of APF that its output current is mainly composed of harmonic currents, thus the sum of absolute value of three-phase current greatly fluctuates within a cycle, the controller adjusts the switching frequency according to the value of output current of APF to reduce the switching loss effectively with the same control precision. The relation between optimal switching frequency and fluctuation range of current-norm is derived theoretically, and a new hysteresis current controller is designed. Simulation results show that the proposed method can hold the overall control precision while the total switching loss is reduced effectively.

Keywords: active power filter (APF)   hysteresis current control   switching loss   harmonic elimination   hysteresis band  
收稿日期 2008-11-12 修回日期 2009-11-03 网络版发布日期 2010-02-02 
DOI:
基金项目:

国家自然科学基金资助项目(50707010)。

通讯作者: 刘艳
作者简介: 曾江(1972—),男,博士,主要研究方向为配电网自动化、电能质量分析与控制,E-mail:zengxy@scut.edu.cn。
作者Email: liuyan860710@yahoo.com.cn

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