基于多重复系数滤波的电压补偿策略

Voltage compensation strategy based on multiple-complex coefficient filter

提出一种基于电压的选择性谐波补偿方法(SHC),该方法使用多重复系数滤波器来提取谐波电压,并通过静止坐标系下的广义积分器(SGI)来输出已检测出的谐波补偿量。多重的复系数滤波器可以在电网处于扰动状态时精确地分离电网的基波和谐波分量,为控制SAPF提供准确的参考值。仿真试验结果验证了该方法对电压谐波的检测具有较高精度和很好的补偿效果。

This paper proposed the method for voltage- based selective harmonic compensation（ SHC）,a method which used multiple- complex coefficient filter to extract harmonic voltage and transferred the checked harmonic compensation quantity through SGI in static coordinate. Furthermore,multiple- complex coefficient filter could separate grid fundamental wave from harmonic component when the grid is under the condition of disturbance,further providing accurate reference value in the overall SAPF control. The simulation results validate the proposed method for voltage harmonic detection accuracy and compensation effect.