110kV线路WXB 11型微机保护采用“三取二闭锁”的取舍

The Choice of “2 Out of 3 Block” Function in WXB?11 Microprocessor?Based Protection for 110 kV Power Line

Ｗ Ｘ Ｂ１１ 型微机线路保护在１１０ ｋ Ｖ 线路上得到广泛应用。该保护装置的高频保护、距离保护、零序保护，既可采用“三取二闭锁”，也可以各自独立，各有其利弊。

WXB 11 microprocessor based protection device is widely used in 110 kV power line. The high frequency block relay, distance relay and zero sequence current relay in the device can be used by the term of “2 out of 3 block” or used independently. Each mode gets its own advantages and disadvantages.