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并联有源滤波器新型滞环电流控制
供稿: 杨凌霄;和志威 时间: 2018-11-26 次数:

作者:杨凌霄;和志威

作者单位:河南理工大学电气工程与自动化学院

摘要:电流跟踪控制环节性能的优异对于有源滤波器的滤波能力有着重要影响.传统滞环电流控制响应速度快、结构简单,但因为环宽固定导致器件开关频率高,开关损耗大.为了克服传统滞环电流控制开关频率高、损耗大的缺点,本文采用一种可变环宽的滞环电流控制,通过使滞环宽度随着电流幅值变化实时调整,在保证跟踪精度的前提下达到降低最大开关频率及控制开关频率波动的目的.最后通过MATLAB进行系统仿真验证了变环宽滞环电流控制方法对逆变器开关频率控制的有效性.

关键词:有源滤波器;滞环电流控制;可变环宽;

DOI:10.16186/j.cnki.1673-9787.2014.01.018

分类号:TN713.8

Abstract:The performance of current tracking control has an important influence on the filtering ability of an active power filter. Traditional hysteresis band current control( HBCC) has a fast response speed and a simple structure. However,there are high device switching frequency and switching losses because of its fixed ring width. In order to overcome the weakness,this paper adopts a variable hysteresis-width method. Through realtime adjusting the width of a hysteresis band,the maximum switching frequency is reduced in the condition of tracking accuracy. Thusly,we can control switch frequency fluctuations. At last,the feasibility of the new hysteresis-current-control method is verified by the MATLAB system simulation.

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