LCL滤波的PWM整流器直接功率控制

摘要

A novel direct power control method for PWM rectifier with LCL filter is proposed. The instant poweT is calculated based on grid side currents and the damping power are constructed based on capacitor currents. Three-level hysteresis comparators and a new switching table are used to improve the control performance of reactive power. The simulation results show that the grid side currents have low harmonic distortions, the power factor is close to 1, and the resonance is suppressed effectively, which verify the validity of the proposed method.%提出一种LCL滤波PWM整流器的新型直接功率控制策略,采用网侧电流计算瞬时功率,利用电容电流构造阻尼功率,为了改善无功功率的控制效果,使用三电平滞环比较器和新型开关表.仿真结果表明网侧电流畸变率很低,功率因数接近于1,且谐振得到了有效抑制,证明了所提方法的有效性和正确性.