Especially on the failure causes due to voltage differential relay protection, reason and treatment methods leading to operation failure are introduce in detail. 尤其对由于差压保护动作,导致投运失败的原因和处理方法作了详细的介绍。
However, for extra-high voltage transmission protection researches so far mostly concentrate on phase-separated differential protection, the ordinary protection ( distance relay and direction relay) are used in this thesis. 而对特高压输电保护而言,目前研究多集中在分相差动,论文则以常见的距离保护和方向保护为例,对传统保护在特高压暂态过程中的表现展开了深入研究。