单相电路谐波抑制与无功补偿算法改进

Suppression of the Harmonic in Single-phase Circuit and Improvement of the Arithmetic for Reactive Power Compensation

分析了一类基于积分的有源电力滤波器的设计思路,并在此基础上,根据电力系统一般只含有奇次谐波的特点,优化了单相电路谐波抑制与无功补偿的算法。将基于数字化的有源电力滤波器的补偿延迟由一个周期缩短到半个周期,提高了补偿的实时性,且算法原理明了,实施方法简单。通过仿真试验,对比了不同方法对谐波抑制与无功补偿的效果,从仿真的角度证明了该方法的有效性。

A design idea for the integral active power filter is analyzed. According to the characteristic of odd harmonics which only containing in electric power system, the suppression of the harmonic in single-phase circuit and the improvement of the arithmetic for reactive power compensation are optimized. The compensation delay of the active power filter will be shortened from one cycle to a half cycle based on the digital method. It can enhance real-time compensation, and the theory of arithmetic and its implementation are very simple. Compared with the effects that use different methods to suppress the harmonic and to compensate the reactive power, the validity of the method which given in this paper is proved.