接地距离 meaning in English

ground distance
touchdown distance

According the special application background of the single source and the short line in the 110kv power system , the author proposed a feasible protective scheme , in which the power frequency variation distance protect theory with combination to the four - lateral distance relay is used as quick and mainly theory
本人针对110kv单电源短线路这一特殊应用背景，提出了以工频变化量距离保护为快速主保护，结合四边形三段式相间和接地距离保护的保护原理方案。