分析了并联型有源电力滤波器的基本工作原理、系统结构和PWM控制的基本原理，采用基于瞬时无功功率理论的改进型ip-iq电流检测算法，建立了基于MATLAB仿真软件中电力系统仿真工具箱的PWM控制的并联型有源电力滤波器的仿真模型，并进行了仿真研究，给出了应用并联型有源电力滤波器抑制典型非线性谐波电流源负载对电网谐波电流污染的仿真模型，论述了连接电抗器值的大小对补偿装置性能的影响，通过仿真实验研究，结果证实了所提方案的正确性和可行性。关键词：并联型有源电力滤波器；脉宽调制；连接电抗器；瞬时无功功率理论；改进型ip-iq法ABSTRACT: Analyzed the fundamental principle, system structure and PWM control theory of shunt active power filter, used improved ip-iq current detector method of instantaneous reactive power theory, built and simulated the simulation model of shunt active power filter with PWM control based on MATLAB SimPowerSystems, gave simulation model of using shunt active power filter to suppress the harmonic current pollution of typical nonlinear harmonic current source load to the network, discussed the effect of linked reactorvalue on the compensation equipment function, by experiment of silulation, in a result, approved the correctness and feasibility of the project.KEY WORDS: shunt active power filter; pulse width modulation; linked reactor; instantaneous reactive power theory; improved ip-iq method