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

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低壓電纜橋架振動(dòng)與接地線電流異常原因分析

來(lái)源:電工電氣發(fā)布時(shí)間:2020-11-19 14:19 瀏覽次數(shù):833
低壓電纜橋架振動(dòng)與接地線電流異常原因分析
 
王亞青1,張國(guó)興2,劉惠姣3
(1 保定電力職業(yè)技術(shù)學(xué)院,河北 保定 071051;2 中冀電力集團(tuán)股份有限公司,河北 保定 071051;3 鼎陽(yáng)智電慧服科技股份有限公司,河北 保定 071051)
 
    摘 要:某電力施工工程,調(diào)試運(yùn)行大負(fù)荷用電設(shè)備時(shí)出現(xiàn)線路壓降偏大、三相電流運(yùn)行不平衡、設(shè)備接地線路接地電流異常現(xiàn)象,且電纜橋架有劇烈振動(dòng)并伴隨較大的工頻噪聲,通過(guò)對(duì)線路阻抗電壓、二次電流產(chǎn)生的原因、運(yùn)行電纜相互作用力等方面的理論計(jì)算和原理分析,結(jié)合實(shí)際測(cè)量并進(jìn)行問(wèn)題排查,論證了造成以上現(xiàn)象的主要因素。經(jīng)過(guò)現(xiàn)場(chǎng)問(wèn)題的排查和總結(jié),糾正了施工過(guò)程中工藝的錯(cuò)誤,并給出了正確的施工工藝,消除了運(yùn)行隱患。
    關(guān)鍵詞:接地電流;電磁感應(yīng);磁動(dòng)勢(shì);相互作用力;交變磁場(chǎng)
    中圖分類號(hào):TM726.4     文獻(xiàn)標(biāo)識(shí)碼:B     文章編號(hào):1007-3175(2020)11-0044-05
 
Analysis on the Cause of the Vibration and the Abnormal Current of Grounding System of Low Voltage Cable Bridge
 
WANG Ya-qing1, ZHANG Guo-xing2, LIU Hui-jiao3
(1 Baoding Electric Power VOC.&TECH. College, Baoding 071051, China;
2 Zhongji Power Group Co., Ltd, Baoding 071051, China;
3 Dinyoung Intelligent Electric Power Service Technology Co., Ltd, Baoding 071051, China)
 
    Abstract: In an electric power construction project, when debugging and operating heavy load electric equipment, there are large line voltage drop, unbalanced operation of three-phase current, abnormal grounding current of equipment grounding line, and violent vibration of cable bridge accompanied by large power frequency noise.Through theoretical calculation and principle analysis on the causes of line impedance voltage, secondary current, interaction force of operating cable, combined with the actual measurement and troubleshooting, the main factors causing the above phenomenon are demonstrated.Through the investigation and summary of the field problems, the errors in the process of construction are corrected, and the correct construction process is given, which eliminates the operation hidden dangers, promotes the progress of the construction technology of the construction party to a certain extent, and better guarantees the safe operation of the equipment.
    Key words: grounding current; electromagnetic induction; magnetomotive force; interaction force; alternating magnetic field
 
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