基于DSVM的三相PWM整流器直接功率控制

Direct power control of three phase PWM rectifier based on discrete space vector modulation

针对PI调节的滞后性及传统直接功率控制过于简单等不足,将瞬时功率理论与滑模变结构控制理论相结合,提出一种基于离散空间电压矢量的直接功率控制策略。该策略外环采用滑模变结构控制,提高系统的鲁棒性;内环采用模糊控制与离散电压空间矢量(DSVM)调制相结合的方式,优化电压矢量的选择,提高系统的动态性能。仿真实验表明,该控制策略在系统动态性能、稳定性、电流畸变率和功率因数方面都有较好的效果。

Due to the lag of the PI regulator and the simple control of traditional direct power, combining the instantaneous reactive power theory and the sliding mode control theory, a direct power control strategy based on the discrete space vector modulation was proposed. The strategy used sliding mode control in the outer loop to increase the system＇s robustness while using the combine both the fuzzy control and discrete space vector modulation in the inner loop in order to optimize the voltage vector and improve the system dynamic performance. The simulation results show that the control strategy has a good performance in the system dynamic performance, stability, current distortion and power factor,