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

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特高壓輸電線路檢修工況下感應(yīng)電壓與電流計(jì)算分析

來(lái)源:電工電氣發(fā)布時(shí)間:2023-08-28 10:28 瀏覽次數(shù):270

特高壓輸電線路檢修工況下感應(yīng)電壓與電流計(jì)算分析

閆可為1,李偉2,魏小龍3,李新民2,韓彥華2,張璐2,孔志戰(zhàn)3
(1 國(guó)網(wǎng)陜西省電力有限公司超高壓公司,陜西 西安 710075;
2 國(guó)網(wǎng)陜西省電力有限公司電力科學(xué)研究院,陜西 西安 710100;
3 國(guó)網(wǎng)陜西省電力有限公司,陜西 西安 710048)
 
    摘 要:針對(duì)特高壓輸電線路在檢修工況下因受同塔或臨近運(yùn)行導(dǎo)線的影響,面臨嚴(yán)重的電磁感應(yīng)問(wèn)題,建立了檢修導(dǎo)線掛接地線前的感應(yīng)電壓及掛接地線后的感應(yīng)電流計(jì)算模型,定量地研究了輸送功率、并行長(zhǎng)度、并行間距、桿塔接地電阻等參數(shù)對(duì)上述感應(yīng)電壓及感應(yīng)電流的影響規(guī)律和影響程度,并建立 ±1 100 kV 吉泉線的實(shí)際工況模型,計(jì)算分析了吉泉線在檢修工況下沿線的感應(yīng)電壓、感應(yīng)電流幅值和分布規(guī)律。研究結(jié)果為特高壓輸電線路的檢修作業(yè),以及特高壓輸電線路檢修用消弧接地線的參數(shù)選型提供了依據(jù)。
    關(guān)鍵詞: 特高壓輸電線路;電磁感應(yīng);輸送功率;并行長(zhǎng)度;并行間距;桿塔接地電阻
    中圖分類號(hào):TM726.1     文獻(xiàn)標(biāo)識(shí)碼:B     文章編號(hào):1007-3175(2023)08-0030-05
 
Calculation and Analysis of Induced Voltage and Current in Maintenance
Condition of UHV Transmission Line
 
YAN Ke-wei1, LI Wei2, WEI Xiao-long3, LI Xin-min2, HAN Yan-hua2, ZHANG Lu2, KONG Zhi-zhan3
(1 State Grid Shaanxi Electric Ultrahigh Power Co., Ltd, Xi’an 710075, China;
2 Electric Power Research Institute of State Grid Shaanxi Electric Power Co., Ltd, Xi’an 710100, China;
3 State Grid Shaanxi Electric Power Co., Ltd, Xi’an 710048, China)
 
    Abstract: UHV transmission lines have serious electromagnetic induction problems under maintenance conditions because of the effects of the same tower or adjacent operating wires, so the paper builds a model to calculate the induced voltage before hanging the grounding wire and the induced current after hanging the grounding wire. It analyzes the influence rule and influence degree of the parameters such as transmission power, parallel length, parallel spacing and tower grounding resistance on the induced voltage and induced current in a quantitative way. Then, the actual working condition model of ±1 100 kV Jiquan transmission line is established to analyze its amplitude and distribution of induced voltage and induced current under maintenance conditions. The research results can provide a basis for the maintenance of UHV transmission lines and the parameter selection of arc suppression grounding wires used for maintenance.
    Key words: UHV transmission line; electromagnetic induction; transmission power; parallel length; parallel spacing; tower grounding resistance
 
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