基于单周控制的串联混合型APF的研究

摘要

In order to solve voltage type harmonic source which took up a high proportion of the rectifier load for, the series hybrid active power filter (SHAPF) can compensate the harmonic distortion caused by voltage type harmonic source. This paper established a SHAPF single - phase equivalent circuit and one - cycle controlled switching circuit model, analyzed SHAPF compensation characteristics and prineiples of the one - cycle control theory. On this basis,this article has analyzed the structure of series hybrid APF, modeling, neutral - point potential balance and simulation.Simulation results show that the series hybrid APF can effectively compensate the harmonic and neutral current produced by real -time non -linear load, and effectively inhibit the neutral -point potential.%针对整流负荷中占很高比例的电压型谐波源,采用串联混合型有源电力滤波器(SHAPF)能够进行有效的补偿.本文建立了SHAPF的单相等效电路图和单周控制的开关电路模型,分析了SHAPF的补偿特性和单周控制理论的原理.在此基础上,本文对SHAPF的拓扑结构进行了分析、建模、中点电位控制和仿真研究.仿真结果表明:该有源电力滤波器能有效地实时补偿非线性负载产生的谐波和零线电流,并能够有效地抑制中点电位.