不断电柔性过分相仿真研究

Simulation Researches on Flexible Passing of Phase Break with Uninterrupted Power Supply

电力机车在通过电分相时会产生一系列的暂态变化,如电压冲击、电流冲击、速度损失等。本文在RTDS上应用电力电子技术搭建背靠背变流器模型,利用移频调相技术使机车电压在两供电臂和中性段电压之间柔性切换,模拟机车不断电过分相的过程;通过功率控制算法对单相全桥逆变器输出功率进行控制,实现列车负载功率在接触网供电臂和中性段之间的可控切换,使列车受电弓与接触网导线分离时不产生拉弧。

The electric locomotive will produce a series of transient changes of voltage surges,current surges and speed losses when it is passing through the phase break.The paper illustrates that a back-back converter model is established on RTDS by application of electric and electronic technology to realize the flexible transition of locomotive voltage between two power feeding sections and neutral section by application of frequency shift phase modulation technology for simulation of passing through the phase break by the locomotive with uninterrupted power supply;the output power of single phase full bridge inverter is controlled by power control algorithm to realize the controllable transition of the train load power between OCS feeding section and neutral section which will make the pantograph of the locomotive not producing arcing when it is departing from the contact wire.