摘要
通过分析三相脉宽调制(PWM)整流器在d-q旋转坐标系下的数学模型,设计了具有前馈解耦控制的PWM整流器双闭环控制系统。根据系统对电流内环的控制要求设计电流比例积分(PI)调节器,提出按闭环幅频特性峰值(Mr)最小准则来确定调节器参数的方法;根据系统对电压外环的控制要求,采用模最佳整定法来设计电压PI调节器。最后对整个PWM整流器双闭环控制系统进行仿真,仿真结果验证了PI调节器设计的正确性。
A simplified mathematic model of three-phase Pulse Width Modulation（PWM）rectifier is analyzed in the d-q rotation frame,and the double closed loop control system with feedforword is established. To determine the parameters of the adjustor, the minimum criteria method on closed loop peak amplitude frequency characteristics was proposed according to the control requirement of the inner current loop. The PI parameters of voltage adjustor were designed using the mold optimal tuning method according to the control requirement of the outer voltage loop. Finally, the double close-loop control system was simulated, simulation results demonstrate the effectiveness and correctness of the design.
出处
《通信电源技术》
2010年第2期44-47,共4页
Telecom Power Technology
关键词
PWM整流器
双闭环
PI调节器
电流环
电压环
PWM rectifier
double closed loop control
PI adjustor
current loop
voltage closed loop
unity power factor
