静止坐标系下PWM整流器准直接功率控制

传统的PWM整流器功率控制方法往往需要进行坐标变换,甚至需要采用锁相环等技术实现电网电压锁相,其系统控制复杂且易受锁相误差干扰。为此,本文提出一种静止坐标系下PWM整流器准直接功率控制方法。该方法可直接在三相静止坐标系下实现功率与电流的转化,省去了繁琐的锁相环节和坐标变换,使控制过程更简单、变量物理意义更清晰明确。仿真实验结果表明,该方法不仅具有良好的动、静态控制性能,还具有较强的抗干扰能力。

A Quasi Direct Power Control of PWM Rectifiers in Stationary Coordinate Systems

Traditional PWM rectifier power control methods often need coordinate transformation and even phase-locked loop technology to realize the phase-locking of the power grid voltage,making the system control complicated and susceptible to the interference of phase-locked error.For that reason,a quasi direct power control method of PWM rectifiers in stationary coordinate systems is proposed in this paper.The method can realize the direct conversion between power and current in the three-phase stationary coordinate system,which eliminates the tedious phase-locked loop and coordinate transformation and makes the control process simpler and the physical meaning of variables clearer.Simulation results show that the method not only has good dynamic and static control performance but also has strong anti-interference capability.