永磁牵引系统退磁故障自主延寿控制

Autonomous life extending control for PMSM rail vehiclesunder demagnetizing fault

为了保障永磁牵引列车在退磁故障下的可靠性与安全性,并缓解由此导致的逆变器损伤加剧问题。提出了一种在混合建模基础上的永磁牵引系统延寿控制方法。该方法在实时监测退磁程度的基础上,提出通过控制率重构的方法,适当降低退磁电机输入功率;在估计退磁程度的同时,将机电系统作为整体进行闭环控制,从而有效地延长了逆变器系统的寿命。以西门子Syntegra永磁同步电机牵引系统为例,对于多种工况下的退磁监测与延寿控制效果进行了仿真的验证,实验结果表明该方法能够准确监测退磁程度,在不影响系统服役性能的前提下,延长逆变器系统的整体寿命。

To relieve the increased damage of inverters and guarantee reliability and safety of PMSM-driven rail vehicles suffering demagnetization fault, this paper presents an advanced life-extending control strategy through hybrid model. The proposed strategy conducts online remaining flux estimation and offline control law reconfiguration, to decrease the input power of PMSM with demagnetization. It regards PMSMs-Inverter as a whole electromechanical system for closed loop control to autonomously extend the operation life of inverters. The feasibility and benefit of the life extending control strategy is validated through a simulated experiment of Syntegra PMSM rail vehicle. The simulation results show that accurate monitoring and damage prognosis of demagnetization can be , and the life of inverters is extended effectively without influencing operation performance.