城轨变电所直流操作电源接线及额定电压选择

DC operating power connection and rated voltage selection for transit substation

针对城市轨道交通变电所直流操作电源接线和母线额定电压设计标准不统一的问题,结合城市轨道交通变电所直流操作电源故障影响范围和负荷特点,对不同方案进行分析得出推荐方案:车站变电所直流操作电源宜采用单母线接线,主变电所直流操作电源宜采用单母线分段接线;变电所直流操作电源母线额定电压应优先选用DC110V电压等级。推荐方案满足规范要求,同时具有系统结构简单、工程投资小、便于工程实施等优点。

In view of the problem that the DC operation for power connection and the bus rated voltage design standard in urban rail transit substation are not uniform, this paper analyzes different schemes, and recommends： A single bus connection should be used for DC operation power supply in station substations, the DC operation power of main substation should use single bus section connection, the rated voltage of the bus line of DC operating power should choose DC110V voltage level as the priority. The recommendation scheme has the advantages of meeting the specification requirements, simple system structure, less engineering investment and convenient engineering implementation.