地铁牵引系统无速度传感器带速重投控制策略研究

Study on Speed-Sensorless Control System Restarting at Unknown Speed of Metro Traction System

文章研究了适用于地铁牵引系统的异步电机无速度传感器矢量控制方法,在闭环全阶转子磁链观测器基础上推导出转速自适应辨识算法,重点针对无速度传感器控制技术在工程实践应用中的难题—带速重投,提出了一种直流脉冲注入结合磁链锁相环以及零转矩修正的两段式带速重投策略。最后通过硬件在环仿真测试以及地面对拖试验证明该无速度传感器控制系统具有良好的动静态性能,并且可以在较小电流、转矩冲击下快速地完成带速重投过程。

This paper studies on a kind of control method applied for induction machine of metro traction system,introduces a speedadaptive identification algorithm derived by the close-loop full-order Rotor Flux observer.Aiming at one of the tough tops in speedsensorless control technique in engineering practice,restarting at unknown speed,this paper proposes a two-stage control strategy which contains the zero-torque correction and DC current impulse integrated with flux PLL.Furthermore,to verified the static and dynamic performance,this Speed-Sensorless control system can finish the restarting process rapidly with relatively small current and impact torque during hardware-in-the-loop simulation test and induction motor back-to-back test.