单相四象限整流器预测电流控制的相位补偿方法

Phase Compensation Method for Single-phase PWM Rectifier Predictive Current Control

针对单相四象限整流器的预测电流控制,提出基于单相软件锁相环的瞬时无功检测方法,利用瞬时无功对预测电流控制方法中电流给定值进行相位补偿,实现四象限整流器单位功率因数运行。采用仿真软件搭建系统模型并进行计算,对控制方法的可行性进行验证。仿真结果表明:在牵引和再生制动工况下,控制方法能够保证网侧的功率因数接近于1,并且具有很好的动态性能。

Aiming at predictive current control of the single phase PWM rectifier, the instantaneous reactive power detection method was presented on the basis of the single phase software phase locked loop. According to the instantaneous reactive power theory, the reactive current of the power current was calculated. The refer- ence current in predictive current control was compensated in phase by the reactive current, and the unity pow- er factor of the PWM rectifier was implemented. The system model was established and simulated in order to validate the feasibility of the current control strategy. The simulation results show that under traction and re- generative modes, the power factor of line is nearly unity, and the dynamic performance is guaranteed.