660MW发电机注入式定子接地保护试验分析

Test Analysis of 660MW Generator Injected Stator Grounding Protection

本文针对采用国电南自DGT801U系列保护装置的注入式定子接地保护试验进行了详细地分析。结合660MW发电机组注入式定子接地保护的试验过程,分析了现场接线配置,保护原理,保护判据和定值整定方法。并通过对保护装置灵敏度的计算和实例分析,验证了本次试验中采用的南自DGT801U系列定子接地保护装置具有较高的测量准确度,足以满足工程上对注入式定子接地保护灵敏度的要求。

This paper adopts State Power from South DGT801U series protection device of injection type stator grounding protection test are analyzed in detail.Combined with the test process of injection stator grounding protection of 660MW generator, the field wiring configuration, the protection principle, the protection criterion and the setting method are analyzed.And through the calculation and example analysis of the sensitivity of the protection device, verify the used in the test of DGT801U series of stator grounding protection device has the advantages of high measuring accuracy, enough to meet the engineering requirements of injection type stator grounding protection sensitivity.