基于对称基准旋转相量的谐波电流检测方法

提出一种适用于有源电力滤波器补偿电流检测新方法。利用对称基准旋转相量求解基波正序有功电流的幅值，并分剐计算电压、电流与基准旋转相量相位差的正余弦值，从而求出基波功率角，消除基准旋转相量与电网电压的相位偏差。仿真结果表明：该方法在电网电压不对称且畸变的条件下能准确提取基波正序有功电流，适用于有源电力滤波系统中谐波、无功及负序电流的综合补偿。

A method to detect harmonic ,current based on symmetric rotating reference phasors

A novel harmonic current detecting method of active power filter was presented. By use of the symmetrical rotating reference phasors, the amplitude of fundamental frequency positive sequence active current was solved. The sinusoidal and cosinusoidal phase difference values of power grid voltages and currents of rotating reference phasors were calculated respectively to solve the power angle. The phase deviation between rotating reference phasors and power grid voltages was eliminated. Simulation results show that the new method can derive the fundamental positive sequence active currents precisely under unsymmetrical and distorted voltage supply conditions, thereby it can be used to comoensate for harmonic, reactive and negative-sequence currents synthetically.