关于500kV SF_6罐式断路器低温压力闭锁的探讨

Investigation on pressure blocking at low temperature for 500 kV SF_6 tank-type breaker

针对黑龙江省及内蒙古高寒区域低温引起500 kV SF6罐式断路器控制回路与压力闭锁回路问题,阐述了SF6气体的性能和电加热装置改造前运行状况,分析了低温影响断路器运行和操作的原因,提出了电加热装置改进方案,防止了高寒地区的SF6低温液化,消除了设备运行隐患。

Aiming at the problems of control and pressure temperature in severe cold area of Heilongjiang and Inner blocking circuit of 500 kV SF6 tank - type breaker by low Mongolia, this paper expounds describes the performance of running state of SF6in gas state and the running state of electric heating apparatus before transformation analyzes why low temperature influences the running and operation of breaker and proposes improvement scheme for electric heating apparatus, which prevents liquefaction of SF6 at low temperature in severe cold area and eliminates hidden danger during running.