采用单电压源逆变器双异步电动机结构提高机车传动系统的性能

Enhanced Locomotive Drive System Behavior Applying a Single Voltage Source Inverter Dual Induction Motor Structure

介绍了一种特殊的多电机多变流器系统(MMS)结构,即专为轨道牵引设计的单逆变器双电机结构。牵引设备必须具有良好的转矩响应,为了控制两台电动机的转矩,可以采用基于传统磁场定向控制(FOC)的协调控制结构。单逆变器双异步电动机传动系统可以提高机车性能,降低由内部和外部干扰产生的不良影响,对其系统性能与传统的机车传动控制系统的性能进行了比较。机车制造商已对仿真模型进行了确认。根据结果对这2种控制方式进行了性能分析,而且考虑了该牵引系统中的4种特性干扰。

A special multi-machine multi-converter system （MMS） structure is presented in this paper. It is a mono-inverter dual motor structure specially designed to be applied in railway traction. In traction applications the necessity to provide an excellent torque response is indispensable. As a consequence, in order to control the torque production of both motors in this kind of structure, special methodologies known as cooperative control structures based in the classical field oriented control （FOC） can be applied. Mono-inverter dual induction motor drive system structure enhances the locomotive behavior, reducing undesirable effects produced by external or by internal perturbations. The obtained system behavior is compared with classical locomotive drive control system operation. An indnstrial locomotive manufacturer has confirmed the simulated model. Obtained results are applied to analyze the system behavior of the two considered control methods, taking into account four characteristic perturbations in this kind of power traction systems.