Nonlinear Control of PWM Rectifier Based on Bilinear System Theory
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摘要: 根据双线性系统理论,建立了三相电压型PWM整流器的双线性系统模型,并通过对系统模型的分析与等效控制输入的选择,将该模型转化为精确的线性模型.在三相静止坐标系下,设计了双闭环控制系统,外环为非线性PI控制,内环为通过求解伪逆矩阵设计的状态反馈控制.实物实验结果表明,控制系统具有良好的稳态和动态性能.Abstract: A bilinear model of PWM rectifier was presented based on the bilinear system theory,and it was transformed into an exact linear model by analyzing the system model and choosing proper control inputs.A double closed loop control system was designed in three-phase stationary reference frame.It has a nonlinear PI controller in the outer loop and a state feedback controller designed based on calculation of pseudo inverse matrices in the inner loop.Experimental results show that the designed control system has good performances in steady and dynamic states.
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Key words:
- PWM rectifier /
- bilinear system /
- pseudo inverse matrix /
- state feedback /
- control system /
- model
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