文档介绍：
目录
1 引言.................................................................................. 2
.......................................................................... 2
...................................................................... 2
................................................................... 2
2 三段式电流保护...................................................................... 4
....................................................................................... 4
.......................................................... 4
.......................................................... 4
.......................................................................... 4
............................................................. 4
................................................ 5
............................................................. 5
...................................................... 6
....................................................................................... 6
....................................................................................... 7
3 距离保护................................................................................ 9
...................................................................... 9
............................................................................. 9
..................................................................................... 11
..................................................................................... 12
4 三相一次重合闸.................................................................... 13
..................................................................................... 13
...................................