电力系统保护与控制2011，Vol.39Issue(7)：133-135,141,4.
备自投装置在单母分段接线中应用存在的问题及解决措施
The problem existing in automatic close-up device of stand-by power supply used in sectionalized single bus scheme and its solving measures
张丰 1郭碧媛1
作者信息
- 1. 福建省福州电业局,福建,福州,350009
- 折叠
摘要
Abstract
The operation mode ofsectionalized single bus is similar to that of internal bridge scheme.However, the present close-up device of stand-by power supply can't be directly used in sectionalized single bus scheme without busbar protection at the terminal substation, because there is a problem that automatic device won't be blocked due to the faults of any bus.For this reason, line protection with the inverse direction is suggested to be added to the logic for automatic close-up device of stand-by power supply which will make automatic device be reliably blocked.At the same time, in the mode of power line stand-by power supply, it can't judge which bus is at fault for line protection with the inverse direction, and automatic device will be blocked due to the fault of any bus, which results in non-selective action of automatic device, and it will come to the ending that all loads are lost.To solve the problem, the paper suggests that it needs to add a criterion judging whether there is fault current going through the bus sectionalizing breaker to the action logic of power line stand-by power supply, and the setting of fault current can adopt the method of over-current, or more sensitive method of current variation of fault phase.关键词
单母分段接线/备自投/桥备自投/进线备自投/故障相电流突变量Key words
sectionalized single bus scheme/ automatic close-up device of stand-by power supply/ automatic close-up device of stand-by power supply in respect to bus-tie breaker/ automatic close-up device of stand-by power supply in respect to power line/ current variation of fault phase分类
信息技术与安全科学引用本文复制引用
张丰,郭碧媛..备自投装置在单母分段接线中应用存在的问题及解决措施[J].电力系统保护与控制,2011,39(7):133-135,141,4.
