Дослідження режимів роботи захистів від однофазних замикань на землю у мережі з ізольованою нейтраллю за умови існування ферорезонансних процесів

Abstract

The problem of distribution of zero-sequence currents and modes of protection against single-phase earth fault with the existence of ferroresonance processes are considered in the article. It’s shown that in the ferroresonance mode the false tripping of both electromechanical and digital relaying is possible. There have been considered the typical algorithms of protection against single-phase earth fault that are used by digital terminals of relay protection, and also special feature of their setting and blocking at the ferroresonance mode.