基于自抗扰控制的异步电机泵水系统控制研究

Research on Water Pumping System Control of Induction Motor Based on Active Disturbance Rejection Control

针对潜水泵异步电机矢量控制系统中负载突变和参数时变给转速跟踪带来的影响,设计了一种自抗扰控制方法(ADRC)代替传统的PI控制。电机驱动系统中的磁链环控制器和d、q轴电流环控制器采用参数整定简单的线性自抗扰方法构建,并通过扩张状态观测器(ESO)对系统总扰动进行实时预测补偿;对系统存在的延迟特性,采用史密斯(Smith)预估器进行时滞补偿,最后利用Matlab/Simulink软件对异步电机泵水系统进行验证,结果表明加入Smith-LADRC矢量控制的水泵异步电机变频调速系统具有更好的鲁棒性和动态性能。

Aiming at the influence of load mutation and parameter time variation on speed tracking in the vector control system of submersible pump induction motor,an ADRC control method was designed to replace the traditional PI control.Combined with the mathematical model of the induction motor and the mathematical characteristics of ADRC,the linear ADRC method with simple parameter tuning was used to determine the magnetic link loop controller and the D and Q axis current loop controller,and the extended state observer(ESO)was built to estimate and compensate the total disturbance of the system.For the delay characteristic of the system,the Smith predictor was used to compensate for the delay.Finally,Matlab/Simulink software was used to verify the asynchronous motor water pump system.The results show that the pump asynchronous motor variable frequency speed regulation system with Smith-LADRC vector control has better robustness and dynamic performance.