取消110kV PT二次空气开关并联电容的分析

The Feasibility and Necessity of Removing the Shunt Capacitor of Air Switch at Secondary Winging of 110 kV PT

阐述了老变电站在 110 k V电压互感器保护用二次绕组的空气开关 (或熔断器 ) C相上并联电容的原因 ,通过归类分析现行多种微机保护 PT断线的判据分析了电容对微机保护的影响 ,指出取消 110 k V

The reason of using shunt capacitor of air switch (or fuse) in secondary winging of 110kV PT at C phase in previous substation is presented. Based on the analyses of standard to determine the disconnection of PT for various microcomputer protection at present, the influmce of capacitor on microcomputer protection is investigated. It is pointed out that to remove capacitor is feasible and necessary.