一种直流快分开关级差配合校验装置的研究

Research on Differential Coordination Testing Device for DC Fast Switch

当直流电源系统发生过载、短路等故障时,要求直流快分开关不能误动和拒动,尤其不能越级动作,否则将导致事故范围扩大。本文主要讨论了变电站直流电源系统快分开关安秒特性和级差配合,探讨了现场使用的上、下级直流快分开关保护配置和级差配合存在的问题,研究制作了一种直流快分开关级差配合校验装置,为今后变电站直流快分开关的设计选型和检修校验提供了研究工具。

When the DC power supply system suffers from overload and short circuit,etc.,it requires that the DC fast switch can not refuse action or act abnormally,especially can not do the overstep action,otherwise the accident range will be expanded.This paper mainly discusses the characteristics of current-time and differential coordination of DC power supply system in substation,discusses the problems of the protection configuration and differential coordination of the upper and lower DC fast switch used in the operation field,and studies the making of a kind of DC fast switch differential coordination testing device which provides a research tool for design selection and maintenance inspection for the future DC fast switch in the substation.