电力机车试验线平衡供电系统  

作　　者：吕顺凯 

机构地区：[1]株洲中车时代电气股份有限公司,湖南株洲412001

出　　处：《科技创新与应用》2019年第2期1-4,共4页Technology Innovation and Application

基　　金：公司承担的国家重点研发计划项目"高性能牵引供电系统技术"(编号:2017YFB1200800)

摘　　要：电力机车为大功率单相负载,其试验线25kV供电电源经由10kV单相变升压获取,试验时经常造成10kV三相进线侧严重不平衡,导致过流保护跳闸。文章提出了一种用于电力试验线的平衡供电系统方案,介绍了系统拓扑结构和工作原理,探讨了系统控制及保护逻辑,并通过仿真,验证了系统方案及控制策略的可行性和优越性。该平衡供电系统构成简洁,控制策略新型,性能优良,能够实现10kV进线侧三相平衡,显著减小线路电流幅值,充分保障试验线路供电可靠性。Electric locomotive is a high-power single-phase load,its test line 25kV power supply is obtained by 10kV single-phase transformer,the test causes in serious imbalance of the 10kV three-phase line side,resulting in over-current protection tripping.A scheme of balanced power supply system for power test line is presented in this paper.The topological structure and working principle of the system are introduced.The logic of system control and protection is discussed.The feasibility and superiority of the system scheme and control strategy are verified.The balanced power supply system has the advantages of simple structure,new control strategy and excellent performance.It can realize the three-phase balance at the inlet side of the 10kV,significantly reduce the line current amplitude,and fully guarantee the power supply reliability of the test line.

关 键 词：电力机车 试验线 不平衡 控制策略 

分 类 号：TM922.3[电气工程—电力电子与电力传动]