新型贯通同相供电系统建模与运行特性分析

Modelling and operation characteristics analysis of a new continuous co-phase traction power supply system

针对既有牵引供电系统所存在的以负序为主的电能质量问题以及不利于高速、重载铁路发展的电分相问题和系统效率利用问题,研究依托大功率电力电子器件的新型贯通同相牵引供电系统拓扑结构,以牵引供电系统、同相补偿装置以及牵引负荷为研究对象,构建新型贯通同相牵引供电系统数学模型,计算系统潮流分布,优化同相补偿装置容量配置。实例分析表明,上述模型能够正确反映新型贯通同相供电系统的运行特性,为新型贯通同相供电系统的工程应用提供了数据支撑。

This paper aimed at problems of phase separation and negative sequence current,which have a bad influence on the development of high-speed and heavy-loading track and system efficiency of the existing traction power supply system.The topology of a new continuous co-phase traction power supply system was studied based on high-power electronic devices.Taking the new co-phase traction power supply system,compensation device and traction load as research objects,the mathematic model of the new system was built.The power flow distribution was calculated and the capacity of compensation devices was optimized.The analysis of example shows that the model could not only correctly reflect the operation characteristics of the new continuous co-phase traction power supply system but also provide data supporting for its engineering application.