有源电力滤波器滞环空间矢量控制新方法

A New Hysteresis Space-Vector Control Method for Active Power Filters

针对有源电力滤波器在采用多阶滞环空间矢量控制方法时电流畸变率大的缺点,提出一种滞环与多阶滞环空间矢量相结合的分段控制新方法,根据误差电流模值大小合理地选择控制方法.该控制方法简单易行,无需进行大量复杂的计算,在满足电流畸变率的同时,减小了开关频率,改良了电流跟踪性能.仿真与实验结果验证了该控制方法的正确性及优越性.

A new segment control method combining the hysteresis and the multilevel hysteresis spacevector was proposed aiming at the disadvantage of the larger current total harmonic distortion（referred to as THD）caused by the multilevel hysteresis space-vector control in active power filters.The improved segment control strategy alternates hysteresis control and multilevel hysteresis space-vector control strategies through the judgment of the current error vector modulus.It is simple and valid without complicated calculations.The new control strategy can reduce the switching frequency and improve the current tracking performance under the condition of current total harmonic distortion.The simulation and experiment results have validated the correctness and advantage of the proposed control method.