Abstract:Permanent magnet synchronous motor (PMSM) traction drive system is an important part of the stable operation of rail transit vehicle. When the vehicle passes through the power-off area, the power supply system will temporarily lose power and cause the bus voltage mutation. Such mutation will bring current shock and LC oscillation to the traction system, and even trigger serious faults of the system, affecting system operation. In order to enable the vehicle to pass through the power-off area smoothly, this paper establishes the equivalent circuit of the PMSM traction system traversing the power-off area, and deduces the mathematical model before and after the rail transit vehicle traction system enters the power-off area. On this basis, a control strategy for stabilizing the bus voltage passing through the power-off area by rectifying power generation is proposed. As a result, the closing of the traction system and the disconnection of the main contactors can be avoided, and the sudden change of bus voltage when passing through the power-off area is reduced, thereby reducing the impact and oscillation of the traction system. Simulation and experimental results verify the feasibility and effectiveness of the proposed control strategy.
张伟伟, 肖飞, 刘计龙, 麦志勤, 林克文. 轨道交通车辆永磁同步牵引系统断电区穿越控制策略[J]. 电工技术学报, 2021, 36(16): 3483-3492.
Zhang Weiwei, Xiao Fei, Liu Jilong, Mai Zhiqin, Lin Kewen. Power-Off Area Traversing Control Strategy of Permanent Magnet Synchronous Motor Traction System in Rail Transit Vehicle. Transactions of China Electrotechnical Society, 2021, 36(16): 3483-3492.
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