发电机定子接地保护的分析及整定计算

Analysis of the Generator Stator Ground Protection and Setting Calculation

发电机定子绕组因绝缘破坏而导致的单相接地故障,约占定子故障的70%~80%。接地故障时,电弧灼伤定子绕组和铁心,可能造成事故严重化,因此灵敏可靠的定子接地保护意义重大。本文主要介绍了定子接地保护的要求、保护原理及应用,对于指导大型发电机保护配置以及整定计算有一定的指导意义。

Generator stator winding single-phase earth fault caused by the electrical breakdown, accounted for about 70% ~ 80% of the stator fault. When earthing fault, arc burns stator winding and iron core, which may cause serious fault, so sensitive and reliable stator ground fault protection is of great significance？ This article mainly introduced the requirement,principle and application of the stator ground protection, which has certain guiding significance for guiding large generator protection configuration and setting calculation？