基于PR调节器的PWM整流器VFOC控制

研究了两相静止坐标系下三相电压源型PWM整流器虚拟磁链定向(VFOC)控制策略。采用虚拟磁链观测器得到坐标变换中的角度信息,无需电网电压传感器。电流环的控制采用比例谐振调节器(PR)取代传统的PI调节器。该调节器能够抑制低次谐波和开关频率附近的高次谐波,实现电流在两相静止坐标系下的稳态无静差跟踪控制,不需要前馈解耦,简化控制系统设计。搭建了以TMS320F2812DSP为控制核心的实验装置,仿真和试验结果证明了该方法的可行性。

Virtual Flux Oriented Vector Control of PWM Rectifier Based on PR Regulator

Virtual flux oriented vector control strategy of three phase voltage source PWM rectifier under two-phase stationary coordinate system was researched.To eliminate grid voltage sensor,a novel flux observer was adopted to obtain the angle information that used to coordinate transformation.Current loop was controlled by the proportion resonant(PR) controller instead of traditional PI controller.The PR controller can inhibit low order harmonics and the high harmonics in the vicinity of switching frequency.It can achieve no static error tracking control under two-phase stationary coordinate system without need of feedforward decoupling and then simplifier the control system.Real time experiments based on a TMS320F2812DSP platform were conducted.The simulation and experimental results both verify the feasibility of the method.