基于静止坐标系的三相VSR前馈控制仿真研究

Simulation Research of Three-phase VSR Based on A Feed-forward Control strategy in Stationary Coordinate System

为提高三相电压型PWM整流器(VSR)的抗干扰能力,同时克服其在两相同步旋转(dq)坐标系下控制结构复杂、控制参数难整定等缺点,提出了一种基于两相静止(αβ)坐标系的前馈控制策略:运用预测电流控制原理,在静止坐标系下进行了控制系统设计,降低了设计难度;采用抗干扰前馈控制技术,解决了三相电压型PWM整流器受网侧输入电压波动和输出电流变化影响较大的问题。最后在Matlab的Simulink环境下搭建了系统仿真模型,所采用控制方案的有效性得到了验证。

In order to improve the anti-interference ability of three-phase voltage source PWM rectifier(VSR)and overcome the shortcomings of complex control structure and difficult adjustment of control parameters in two-phase synchronous rotating coordinate system(dq),a feed-forward control strategy based on two-phase stationary(αβ)coordinate system was proposed.The predictive current control principle was used to design the control system in static coordinate system,so that the difficulty of design was reduced.Moreover,the anti-interference feed forward control technology was adopted to solve the problem that three-phase voltage source PWM rectifier was greatly affected by the fluctuation of input voltage and the variation of output current of grid side.Finally,the system simulation model was built in Simulink environment of Matlab.Thus,the effectiveness of the control strategy was verified.