交流传动机车牵引变流器的设计与控制

Design and Control Research on the Traction Converter of the AC Drive Locomotive

基于交流传动电力机车牵引变流系统的特点,本文提出了大功率变流器集成箱设计概念,研究了牵引变流器集成箱设计技术。在集成箱的设计中,从机械强度、爬电距离、低感母排、电磁兼容、散热管理和维护便利几个方面,探究了变流器工作可靠性相关的结构布局和功能部件易于装拆的机电接口设计。牵引变流器控制策略考虑不周不仅能引起外部电网和牵引变流器之间到振荡,也能引输出电机到端部过电压和轴承漏电流并加速电机的损坏。本文分析了牵引变流器的控制对系统性能的影响,提出了改善控制策略的具体措施并得到实际结果的证实。

Power Electronics Integrated Case （PEIC） design concept for the high power conversion is presented based on the compact volume characteristics of the high power traction converter of AC drive locomotives. During consideration of PEIC design, the structure configuration issues for the converter reliability and both mechanical and electrical interface issues for the functional pm＇ts assembling facilitatibility are investigated respectively, from view of mechanism intensity, creepage distance, low stray inductance bus bar, PEIC electromagnetic compatibility, thermal management and mainte- nance conveniently. The control strategies of the traction converter could both stir up the voltage resonance of its input power line and speed up the damage fault of its output motor by causing both terminal overvoltage and axle leakage current, if it is not very sophisticated. After analyzing the compact of control strategies of the converter on the AC locomotive drive system, this paper proposed several improvement skills for the control strategies and then verified experimentally.