發(fā)電機裂相橫差保護報警分析與處理
陳熙平,張杰,張強
(雅礱江流域水電開發(fā)有限公司,四川 成都 610056)
摘 要:介紹了發(fā)電機裂相橫差保護報警現(xiàn)場檢查方法,分析了裂相橫差保護報警原因,確認報警原因為發(fā)電機中性點電流互感器(CT)故障。對CT故障原因進行分析可知,是運行環(huán)境溫度長期過高,CT絕緣等級不夠,且設(shè)備本身存在質(zhì)量問題等因素造成。對該故障提出了現(xiàn)場改善措施,運行實踐表明,該改善措施效果明顯。
關(guān)鍵詞:中性點電流互感器(CT);裂相橫差;保護報警;故障
中圖分類號:TM312;TM452 文獻標識碼:B 文章編號:1007-3175(2020)12-0039-04
Analysis and Treatment of Generator Split-Phase Transverse Differential Protection Alarm
CHEN Xi-ping, ZHANG Jie, ZHANG Qiang
(Yalong River Hydropower Development Co.,Ltd, Chengdu 610056, China)
Abstract: This paper introduces the on-site inspection method of the generator split-phase transverse differential protection alarm, analyzes the cause of the alarm, and confirms that the cause of the alarm is the generator neutral current transformer (CT) fault. By analyzing the causes of CT fault, the operating environment temperature is too high for a long time, the CT insulation class is low, and the equipment itself has quality problems. The field improvement measures are put forward for the fault, and the operation practice shows that the improvement measures are effective.
Key words: neutral current transformer; split-phase transverse differential; protection alarm; fault
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