有源电力滤波器的延时特性对补偿效果影响的研究

在实际应用中，由于电流检测的延时与逆变输出电路工作的滞后等因素的影响，有源电力滤波器很难对无功电流和谐波电流做到实时补偿。本文对影响有源电力滤波器实时补偿的因素做了分析，并对这些因素对有源电力滤波器补偿效果的影响程度进行了仿真研究，仿真结果表明，在一定的延时时间范围内，有源电力滤波器可以对谐波和无功电流起到很好的补偿效果，但随着延时时间的增大，补偿效果会随之变差，甚至起不到补偿作用。

A STUDY ABOUT INFLUENCE OF TIME DELAY ONCOMPENSATION RESULTS FOR ACTIVE POWER FILTERS

In practical applications, active power filters are difficult to be implemented with real time compensation, because of the time delay of currents detection, power converter circuits and so on. This paper analyses the delay time related ineffectivity in the real time compensation of active power filters, and the simulation study about the influence of the delay time on active power filters is developed. The study results show that active power filters can compensate harmonic and reactive currents better within a certain delay time range, or else the compensation results of active power filters will become bad, even ineffectivity with the delay time increasing.