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

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基于對稱分量法的融冰裝置同塔雙回線路感應(yīng)電壓分析

來源:電工電氣發(fā)布時(shí)間:2022-06-21 13:21 瀏覽次數(shù):414

基于對稱分量法的融冰裝置同塔雙回線路感應(yīng)電壓分析

李成博,周啟文,劉永剛,李長偉,陳立群
(南京南瑞繼保電氣有限公司,江蘇 南京 211102)
 
    摘 要:為分析線路感應(yīng)電壓對融冰裝置絕緣以及運(yùn)行產(chǎn)生的影響,提出了采用對稱分量法進(jìn)行感應(yīng)電壓的分析方法,分別給出了線路靜電感應(yīng)電壓和電磁感應(yīng)電壓在融冰裝置接入后的等效電路,并通過 PSCAD 電磁暫態(tài)仿真軟件,對理論分析進(jìn)行了驗(yàn)證。結(jié)果表明,在融冰裝置接入后,由于停運(yùn)線路對側(cè)短接,靜電感應(yīng)電壓的正序分量、負(fù)序分量明顯減少,靜電感應(yīng)電壓對于融冰裝置的絕緣和運(yùn)行基本無影響;電磁感應(yīng)電壓雖然會施加在融冰裝置閥組兩端,但是一般情況下,和該線路匹配的融冰裝置的額定電壓會大于該線路電磁感應(yīng)電壓,因此電磁感應(yīng)電壓對融冰裝置絕緣也無影響,其影響之一為在開始解鎖的時(shí)候會導(dǎo)致解鎖時(shí)刻稍有延遲,但解鎖后此影響會消失。
    關(guān)鍵詞: 直流融冰裝置;同塔雙回線路;靜電感應(yīng);電磁感應(yīng)
    中圖分類號:TM714.2 ;TM726     文獻(xiàn)標(biāo)識碼:A     文章編號:1007-3175(2022)06-0024-06
 
Analysis of Induced Voltage of Double-Circuit Transmission Line on Common-
Tower for Deicer Based on Method of Symmetrical Components
 
LI Cheng-bo, ZHOU Qi-wen, LIU Yong-gang, LI Chang-wei, CHEN Li-qun
(NR Electric Co., Ltd, Nanjing 211102, China)
 
    Abstract: This paper proposed the method of symmetrical components to analyze the influence of induced voltage of circuits on the insulation and operation of the deicer. This paper introduced the equivalent circuit of the electrostatic induction voltage and the electromagnetic induction after the deicer connection. In addition, it verified the theoretical analysis by using the software of PSCAD. The result showed that the electrostatic induction voltage has little impact on the insulation and operation of the deicer. After the deicer connection, the positive and negative sequence components of the electrostatic induced voltage are significantly reduced due to the opposite side of the no-operation line short-circuited. Although the electromagnetic induced voltage is imposed on terminals of the valve,the rated voltage of the deicer valve matched this line is larger than the electromagnetic induced voltage. Because of this, the electromagnetic induced voltage does not affect the insulation of the deicer. It might slightly delay from the start. After unlocking the valve,this effect disappears.
    Key words: DC deicer; double-circuit transmission line on common-tower; electrostatic induction; electromagnetic induction
 
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