三相并联型有源电力滤波器定频直接功率控制

Three-phase Shunt Active Power Filter Direct Power Control With Fixed-frequency

基于三相有源电力滤波器(APF)的数学模型,结合瞬时功率理论得到了三相APF的功率数学模型。根据功率数学模型,提出了一种基于虚拟磁链定向的固定开关频率三相并联APF直接功率控制(DPC)方法。相比于传统的控制方法,该方法省去了锁相环,无需进行谐波电流检测,保证了固定开关频率,同时使系统具有较好的动态性能。仿真和实验结果表明所提控制策略能有效地补偿谐波电流,且控制效果好。

Based on the model of three-phase active power fiher（APF） and instantaneous power theory,the mathemati- cal model of the power of three-phase active filter is obtained.According to the power mathematical model, the method of virtual flux direct power control with fixed-frequency is proposed.Compared with the traditional control method, this method can ensure a fixed switching frequency and better dynamic performance without the phase locked loop and harmonic current detection.Simulation and experimental results show that the proposed control method can compensate the harmonic current efficiently and have better control effect.