基于滑窗滤波的谐波电流计算方法的研究

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近年来配电网中整流器、变频调速装置、电弧炉等负荷不断增加,这些负荷的非线性、冲击性及不平衡的用电特性是电力系统的电压、电流波形发生畸变,甚至引起电压波动、闪变和三相不平衡,对供电质量造成了严重的影响,因此消除电网中的谐波污染已经成为电能质量研究中的一个重要课题。有源滤波器（APF）的控制器是APF的关键部分,决定了APF的性能指标和补偿效果。控制器分别实现了谐波指令电流提取,谐波指令电流输出控制。文章将采用一种改进的滞环控制方法以实现非正弦电流的跟踪控制。

The design and implement of a harmonic current computation technique for active power filter based on a simplified DFT was present. For solving the effect of harmonics wave current and reactive current formed by non-linear loads in power system to grid, aiming at the need to provided harmonic reference current control signal for the control of APF, the fast detection method of harmonic reference current control signal was established. The result shows that the method was simple, reliable, good real-time, high detection accuracy.

有源滤波器（APF），谐波提取，滞环控制，APF，harmonic： Hysteresis-loop control。

基于滑窗滤波的谐波电流计算方法的研究。