三相高功率因数PWM整流器双闭环控制系统设计

Dual closed-loop control for three-phase high-power-factor PWM rectifier

引入电压干扰补偿,建立三相高功率因数脉宽调制(PWM)整流器的简化数学模型,该模型既能真实反映PWM整流器的运行状态,又便于控制系统设计。针对电流内环的控制要求,根据电流内环的斜坡响应特性设计其比例积分(PI)调节参数,提出依照I“TAE性能最佳准则”的PI调节参数设计方法;针对电压外环的控制要求,根据电压外环的阶跃响应特性设计其PI调节参数,提出依照“阶跃响应最佳准则”的PI调节参数设计方法。仿真波形和实验数据验证了简化数学模型和PI调节参数设计方法的正确性。

A simplified mathematic model of three-phase high-power-factor PWM（Pulse Width Modulation） rectifier with voltage disturbance compensation is established,which exactly reflects the working state and can be easily implemented in the control system design. To meet the control requirement of the inner current loop,its PI（Proportional-Integral） regulation parameters are designed with the optimum ITAE value rule according to the ramp response characteristic,while to meet the control requirement of the outer voltage loop,its PI regulation parameters are designed with the optimum step response rule according to the step response characteristic. The simplified mathematic model and the proposed PI regulation parameter design methods are verified by simulation and experiments.