电气技术
電氣技術
전기기술
ELECTRICAL ENGINEERING
2012年
11期
67-71
,共5页
樊兵团%杨睿%孙钢虎%兀鹏越
樊兵糰%楊睿%孫鋼虎%兀鵬越
번병단%양예%손강호%올붕월
发电机%定子接地保护%接地变压器%零序电压
髮電機%定子接地保護%接地變壓器%零序電壓
발전궤%정자접지보호%접지변압기%령서전압
generator%stator ground fault protection%grounding transformer%zero sequence voltage
文中介绍了华能铜川电厂发电机100%定子接地保护的原理及构成,一起发电机定子接地事故分析及处理过程,并对机端零序电压和中性点零序电压差异较大问题进行分析,发现原因是发电机中性点接地变压器二次抽头接线错误,并通过试验对此进行了验证。指出了出现这种问题的原因,是启动试验过程中没有采用实际发电机零序电压来检查零序电压回路的正确性,建议在启动过程中增加发电机定子接地试验项目来彻底杜绝此类问题发生。
文中介紹瞭華能銅川電廠髮電機100%定子接地保護的原理及構成,一起髮電機定子接地事故分析及處理過程,併對機耑零序電壓和中性點零序電壓差異較大問題進行分析,髮現原因是髮電機中性點接地變壓器二次抽頭接線錯誤,併通過試驗對此進行瞭驗證。指齣瞭齣現這種問題的原因,是啟動試驗過程中沒有採用實際髮電機零序電壓來檢查零序電壓迴路的正確性,建議在啟動過程中增加髮電機定子接地試驗項目來徹底杜絕此類問題髮生。
문중개소료화능동천전엄발전궤100%정자접지보호적원리급구성,일기발전궤정자접지사고분석급처리과정,병대궤단령서전압화중성점령서전압차이교대문제진행분석,발현원인시발전궤중성점접지변압기이차추두접선착오,병통과시험대차진행료험증。지출료출현저충문제적원인,시계동시험과정중몰유채용실제발전궤령서전압래검사령서전압회로적정학성,건의재계동과정중증가발전궤정자접지시험항목래철저두절차류문제발생。
This paper describes the Huaneng principle and composition of the Tongchuan power plant generator 100% stator ground fault protection, and with the generator stator ground fault analysis and processing, and machine-side zero sequence voltage and neutral point of zero sequence voltage difference larger analyze the problem, found that because the generator neutral grounding transformer secondary tap wiring errors, and verified by experiment. Pointed out the reasons for this problem is to start the testing process does not use actual generator zero-sequence voltage to check the correctness of the zero-sequence voltage circuit, the proposed increase in the boot process, the generator stator ground pilot projects to eradicate such problems occur.
