【摘要】 注入式定子接地保护在国内大型发电机组,尤其是水轮机组中应用越来越多,其与基波零序电压和3次谐波电压保护构成2套不同原理的100%定子接地保护。结合注入式定子接地保护原理,总结了某电厂注入式定子接地保护现场试验过程和调试、整定方案。试验数据和结果表明了注入式定子接地保护的准确性。另外,对试验过程中出现的一些新问题做了分析,并给出了建议。更多还原

【Abstract】 The injecting source-based stator grounding protection is widely used for large generation units,especially hydroelectric generators.It,combined with the fundamental zero-sequence voltage and third harmonic voltage protection,forms two sets of 100% stator grounding protection with different principles.Its field test and setting scheme for a power station is summarized with its protective principle.Test data and results verify its accuracy.Some issues occurred during field test are analyzed and suggestions are given.更多还原