Suzhou Electric Appliance Research Institute
期刊號(hào): CN32-1800/TM| ISSN1007-3175

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一起特高壓隔離開關(guān)操作回路異常分析

來源:電工電氣發(fā)布時(shí)間:2022-01-20 10:20 瀏覽次數(shù):516

一起特高壓隔離開關(guān)操作回路異常分析

蔣小偉,馬國鵬,費(fèi)韜,宋立華,姜濤
(國網(wǎng)浙江省電力有限公司檢修分公司,浙江 杭州 310000)
 
    摘 要:隔離開關(guān) (閘刀) 的操作回路可靠完善對(duì)保證閘刀穩(wěn)定運(yùn)行具有重要作用。以 1 000 kV 特高壓某站閘刀拒合閘為例,對(duì)故障現(xiàn)象進(jìn)行初步分析,結(jié)合圖紙與經(jīng)驗(yàn)對(duì)故障閘刀操作回路進(jìn)行詳細(xì)檢查處理;針對(duì)檢查中發(fā)現(xiàn)的控制回路自保持功能存在導(dǎo)致閘刀三相異常分、合閘的問題,結(jié)合圖紙分析了該隱患發(fā)生的原因,同時(shí)處理中發(fā)現(xiàn)拉開閘刀控制電源空氣開關(guān) (空開) 和電機(jī)電源空開無法消除自保持;根據(jù)閘刀控制回路接線和空開模式的特點(diǎn),提出了相應(yīng)整改方案,提高了電網(wǎng)安全穩(wěn)定運(yùn)行。
    關(guān)鍵詞:特高壓;隔離開關(guān);操作回路;自保持;空氣開關(guān)
    中圖分類號(hào):TM564.1     文獻(xiàn)標(biāo)識(shí)碼:B     文章編號(hào):1007-3175(2022)01-0045-04
 
Abnormal Analysis of UHV Disconnector Operation Circuit
 
JIANG Xiao-wei, MA Guo-peng, FEI Tao, SONG Li-hua, JIANG Tao
(Maintenance Branch of State Grid Zhejiang Electric Power Co., Ltd, Hangzhou 310000, China)
 
    Abstract: The reliable and perfect operating circuit of the disconnector (knife switch) plays a vital role in ensuring the stable operation of the knife switch.This paper gave an example that the disconnector refused to close in a 1 000 kV UHV substation. It analyzed the symptom of the disconnector, the operation of the break disconnector has been checked as well.It also analyzed the phenomenon that the existence of the control loop self-holding function generated the abnormal opening and closing problem of the three-phase disconnector. During the dealing process, this research discovered that opening the air switch of the knife switch control power and the motor power can not eliminate the self-holding.According to the characteristics of the switch control circuit wiring and air switch mode, this article provides a corresponding rectification scheme to improve the safe and stable operation of the power grid.
    Key words: UHV; disconnector; operating circuit; self-holding; air switch
 
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