基于弧光保护的二次变电所母线保护研究

Research on the Protection of Secondary Substation Bus based on Arc Fault Protection

针对现有的二次变电所由于开关柜弧光故障而导致的母线故障进行研究。分析弧光短路故障的特性,提出一种最新型的保护方案和相应的装置设计。阐述该装置的设计与工作原理,并设计了信道优化模块和弧光故障定位模块,从理论上解决了开光柜弧光短路故障问题,对于相应装置的开发和二次变电所弧光故障的防治具有重大意义。

The number of switchgear used in low and medium voltage station is increasing while the arc fault of switchgear has caused secondary substation bus failure occasionally. This paper makes analysis on the characteristics of the arc short-circuit fault, elaborates on the design principle of a new kind of arc protection device discriminated arc short circuit fault based on the current harmonics and arc light. The channel optimization module and the arc fault location module are designed, solving the arc fault of switchgear in theory, which is of great significance to the development of relative devices and the prevention of secondary substation bus failures.