基于动态规划的异步电动机起动优化控制策略  

Optimal Control Strategy for Asynchronous Motor Starting Based on Dynamic Programming

作　　者：常雨芳[1] 黄文聪[1,2] 孙磊[1] 赵泽夏[1] 

机构地区：[1]湖北工业大学,电气与电子工程学院,湖北武汉430068 [2]武汉理工大学,自动化学院,湖北武汉430070

出　　处：《电力电子技术》2014年第4期13-16,共4页Power Electronics

基　　金：湖北省教育厅青年教师服务企业项目(XD2012198);国家大学生创新创业训练计划项目(201210500044)~~

摘　　要：异步电动机是一个非线性、强耦合、多变量的被控对象,采用常规的控制策略难以取得较为满意的控制效果,且在控制过程中,往往只关注降低起动电流,而忽略了起动时间、转速的协调控制。提出一种基于动态规划方法的异步电动机起动过程优化控制策略,针对起动过程明显的时序性,起动过程被划分为3个阶段,每个阶段采用不同的控制策略,通过动态调整触发电路的触发角,实现起动过程的最优化。在此基础上比较了PID控制与基于动态规划控制策略的控制效果,仿真及实验结果表明该控制策略可在满足起动电流限制的前提下实现起动时间最优控制,具有良好的实用价值。Asynchronous motor is a non-linear, strong-coupled and muhivariable controlled object.It＇s difficult to obtain satisfactory results by the conventional control strategies.In the control process, engineers usually pay much attention to induce the starting current,but ignore the cooperative control of starting time and speed.An optimal control strategy for asynchronous motor starting based on dynamic programming is provided, because the starting process has obvious time sequence.It can be divided to three stages,different control strategy is adopted to dynamically adjust thyristor trigger angle, the starting optimal control realizes.The effect of control strategy based on dynamic programming is compared with PID control strategy by simulation, the simulation and experimental results show that dynamic programming control strategy can realize the optimal control and meet the starting current limit.The control strategy has excellent value.

关 键 词：异步电动机 软起动 最优控制 

分 类 号：TM343[电气工程—电机]