大型水轮发电机内部短路主保护方案研究

Computation and Analysis of the Sensitivity of Main Protective Relay for the Internal Short-circuit of Large Generator

大型发电机单机容量大,其地位显得尤其重要,它的安全运行直接影响到电网的稳定性,一旦遭受损坏,将造成巨大经济损失。本文就三峡机组内部短路的计算数据,分析了各种保护的灵敏度,并评估各种保护的优劣。并以此为基础提出大型水轮发电机组内部短路主保护的较佳设计方案。

Large generator is very important for the whole power system because it has big capacity. So, based on the computational data about one of the generator＇s internal short-circuit, this paper presents the sensitivity of main protection and the design of detailed protective sets. On the above basis, optimum design of main protection for large generator is proposed.