电流反馈有源电力滤波器单周控制策略  

One-cycle control scheme for APF based on current feedback

作　　者：胡志坤[1] 胡成[1] 刘守明 史宏伟 丁家峰[1] 

机构地区：[1]中南大学物理科学与技术学院,湖南长沙410083 [2]河南电力公司周口供电公司,河南周口466001

出　　处：《电机与控制学报》2011年第2期20-25,共6页Electric Machines and Control

基　　金：长沙市科技计划重点项目(K0803159-12);深圳市科技计划基础研究项目(JC200903180555A)

摘　　要：为解决传统单极调制的有源电力滤波器单周控制时电源电流在零点附近的震荡问题,提出一种改进的单相有源电力滤波器控制方案,采用ip-iq算法进行负载基波电流的检测,把负载电流基波分量作为跟踪目标。形成由基波电流检测电路、积分器、比较器及触发器构成的改进单周控制电路,来实现有源电力滤波器的谐波补偿功能,以便降低对系统参数的依赖。建立基于电流反馈的有源电力滤波器单周控制数学模型,通过仿真实验分析了系统的工作过程,将该策略与传统的单极调制进行对比。仿真结果表明:该策略具有更好地稳定性和跟踪能力,并在同样的电路参数下具有更低的THD。A novel one-cycle control strategy for active power filter（APF） is proposed to improve its performance,which is inspired by the finding that source current should oscillate near zero point by using classic one-cycle control scheme for APF based on unipolar operation.It employed ip-iq based algorithm to isolate the load foundational current and took the foundational component of load current as tracking object.So the circuit of single-cycle control for APF was made up of foundational component isolation of load current,integrator,comparator and trigger to realize the function of hormonic compensation of APF,by which the dependance can be reduced on system parameters.It derived the mathematical model of one-cycle control for APF based on current feedback,analyzed the working procedure of the system,and compared the proposed scheme with classic one-cycle control scheme base on unipolar operation by using the simulation test.Computer simulation results suggest that the proposed scheme is with better stability and tracking ability,and can achieve lower THD.

关 键 词：单相有源电力滤波器 单周控制 单极调制 基波电流检测 

分 类 号：TM76[电气工程—电力系统及自动化]