中文摘要：

对基于平衡变压器的同相供电系统拓扑结构和补偿原理进行分析;以变流器控制模式和电能质量指标要求,研究变流器容量优化设计方法,建立电能质量指标约束方程;以某一个具体的牵引变电所为对象利用实测数据对变流器容量进行优化设计。实例分析表明本文所提变流器容量优化方法,在保证系统满足电能质量指标情况下,能明显降低变流器安装容量,从而使得系统工程造价降低,有利于提高系统容量利用率。

英文摘要：

Firstly,an analysis was made on the topology and compensation principle of balance transformerbased co-phase power supply system.Secondly,the design method of converter capacity optimization was studied based on converter control mode and power quality requirements while constraint equation of power quality index was built.Lastly,aparticular traction substation was taken as an example to optimally design the converter capacity according to measured data.Example analysis showed the capacity optimization method proposed in the paper can significantly reduce the installed capacity of the converter while ensuring the system meeting the power quality indicators with reduced project cost and improved utilization ratio of the capacity of co-phase power supply system.