双积分控制策略研究及在单相并联APF中的应用  

Double Integration Control and Its Application in Single-Phase Shunt Active Power Filter

作　　者：戎袁杰[1] 李春文[1] 丁青青[2] 

机构地区：[1]清华大学自动化系,北京100084 [2]清华大学电机系,北京100084

出　　处：《高电压技术》2009年第3期711-716,共6页High Voltage Engineering

基　　金：国家自然科学基金(60674039)~~

摘　　要：为了解决电压跟踪的快速实时问题,针对电压型逆变器提出了双积分控制。双积分控制在电压跟踪上只需要一个比较器及两个带重置功能积分器,其方法原理较简单有利于实际应用。为了扩展双积分控制的应用范围,设计了基于负载电流检测的前馈控制器将电压跟踪问题转换为电流跟踪问题。双积分控制可以应用于并联有源滤波器的设计,使并联滤波器的输出电流跟踪参考电流;由于积分器的作用,双积分控制亦可以抑制直流侧电压波动产生的干扰。但是双积分控制的信号输出频率不固定,延时环节的设计可使双积分控制输出信号的频率集中于一个高频范围,通过无源滤波器的设计进行滤除。双积分控制器控制精度高、动态响应迅速并且鲁棒性强。仿真实验结果验证了所提控制策略的有效性及可靠性。Double Integration Control （DIC） is proposed to realize the fast real-time voltage tracking of voltagesource inverter. This control strategy only needs one comparator and two integrators with reset in voltage tracking. The DIC strategy can be easily utilized in practical application due to its simplicity. To expand the application range of double integration control, a feed-forward controller based on current detecting is constructed to convert current tracking into voltage tracking. Thus, double integration control can be utilized in shunt active power filter to implement current compensation. And double integration control can suppress the disturbance of DC-link voltage. Because of real-time comparison, the frequency of harmonic brought by double integration control is not constant and covers a full range. Therefore, a time delay is designed with two integrators. This.method can make the harmonicfrequen cy generated by DIC in a range beyond low frequency. The harmonics brought by DIC can be easily dealt with passive filter. Double integration control owns fast response, accuracy and robustness. The simulation results show that the proposed control strategy is effective and reliable.

关 键 词：并联有源滤波器(APF) 谐波 双积分控制 电压跟踪 电流跟踪 鲁棒 

分 类 号：TM761[电气工程—电力系统及自动化]