摘要
Abstract
Considering the features of the main wiring of the substation which is co-built not only for the electric traction system but also for the electricity system on electrified railway, and drawing lessons from the electricity system, a complete set of busbar protection scheme is proposed in this paper. And then, the paper carries out a comprehensive discuss on this scheme, including starting element, ratio restraint differential element, protection principle of bus connection protection element, auxiliary locking element, operation criterion, parameter tuning and the logic relationship in interaction. This scheme has good selectivity which can effectively avoid the incorrect protection caused by current transformer saturation in the case of external fault. While the internal fault occurs, the scheme has high sensitivity which can guarantee the reliable power supply and stable operation of both electric traction system and railway electricity system. This paper also provides reference and advice for the design of this kind of substation co-built for both electric traction system and electricity system.关键词
电气化铁路/母线保护/牵引电力合建变电所/比率差动/母联保护Key words
electrified railway/ busbar protection/ substation co-built for both electric traction system and electricity system/ ratio differential/ bus connection protection分类
交通工程
