摘要
大型发电机内部短路主保护方案的配置是大型发电机安全可靠运行的前提基础,是电力设计者的重要任务。本文对大型发电机内部短路四种主保护的原理进行了详细的叙述,通过灵敏度计算分析软件对四种主保护的灵敏度进行分析,并根据对匝间短路和相间短路的分析结果总结了灵敏度的变化规律,并将定子绕组分为两个中性点和三个中性点两种情况讨论分支组合方式,归纳了主保护方案的配置方法及最终方案的确定方法,为大型发电机配置高性能的主保护方案提供了理论基础。
The main protection configuration scheme for internal short circuit of large generators is the premise foundation of its safe and reliable operation. It is an important task of power designers. In this paper, the principle of the four kinds of main protection for the internal short circuit of large generators has been carried on the detailed narration. The sensitivities of four main protections were analyzed through the software for calculation and analysis of the sensitivity. The laws of sensitivity according to the analysis results of inter-turn short circuit and interphase short circuit were summarized. The ways of the stator winding branches combination were discussed in two different conditions--two neutral points and three neutral points. The method of the main protection configuration scheme and the method for determining of the final scheme were summarized. This paper provides the theoretical basis for high-performance main protection configuration scheme of large generators.
出处
《大电机技术》
北大核心
2014年第1期10-14,17,共6页
Large Electric Machine and Hydraulic Turbine
基金
国家科技重大专项资助项目(2009ZX06004-013-04-01)
关键词
大型发电机
内部故障
灵敏性分析
定子绕组分支引出
主保护配置
方案选择
large generators
internal faults
sensitivity analysis
the ways of the stator windingbranches combination
main protection configuration
scheme selection
