三相电压型PWM整流器分数阶PID控制
首发时间:2012-12-28
摘要:本文研究了一种基于分数阶PID控制器的三相电压型PWM整流器直接功率控制方案,设计了功率控制内环、直流电压外环的控制结构,并采用分数阶PID控制器进行直流侧电压控制,解决了基于整数阶PI控制器的直接功率控制方法抗扰性能差以及对PI控制参数较敏感的缺点。仿真实验证明,分数阶PID控制方案明显优于PI控制方案,具有较强的鲁棒性和动态性能,响应速度更快,控制结果更精确。
关键词: 三相电压型PWM整流器 直接功率控制 直流侧电压 分数阶PID
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Control based on Fractional-order PID controller of three-phase voltage source PWM rectifier
Abstract:This paper proposed a control strategy of three-phase PWM rectifier based on direct power control, which used fractional-order PID controller. Double control-loop is designed based on instantaneous power theory, and the inner-loop is power control-loop, the external-loop is voltage control-loop. Fractional-order PID controller is used to control the DC voltage, because the integer-order PI controller has poor anti-interference performance and plays sensitive to the parameter-varying of the system. The fractional-order PID controller is designed by frequency domain design method under the power model of the system. The simulation results show that the fractional-order PID controller has good dynamic performance, robust performance, quick response, and accurate control results, better than PI controller.
Keywords: three-phase voltage source PWM rectifier Direct power control DC voltage Fractional-order PID controller
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