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src="/Skins/333987/images/home.png"></a><a href="/">網(wǎng)站首頁(yè)</a>><a href="/article.html">技術(shù)文章</a> > 變電站接地電阻測(cè)試方法的原理及意義</div> <div id="cowcq0oa" class="page-news"> <div id="cowcq0oa" class="newshowheader"> <h1 class="nd_title">變電站接地電阻測(cè)試方法的原理及意義</h1> <div id="cowcq0oa" class="article-info"> <span> 瀏覽：</span> 880<span id="cowcq0oa" class="split">|</span> <span id="publishtime">更新時(shí)間：2022-06-14</span> <span id="cowcq0oa" class="split">|</span> </div> </div> <div id="cowcq0oa" class="page-newshow"> <p><span style="font-size: 16px;"><strong>變電站接地電阻測(cè)試方法的原理及意義</strong></span><br/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);"> 近年來(lái)，國(guó)內(nèi)很多變電站因雷擊形成擴(kuò)大事故，大部分與地網(wǎng)有關(guān)的<span style="margin: 0px; padding: 0px; border: 0px; font: inherit; vertical-align: baseline; box-sizing: border-box;">接地電阻</span>不合格，起到工作接地和保護(hù)接地的作用，接地電阻過(guò)大時(shí)：發(fā)生接地故障，中性點(diǎn)電壓偏移增加可能會(huì)導(dǎo)致聲音相位和中性點(diǎn)電壓過(guò)高而導(dǎo)致設(shè)備損壞，超出所需的絕緣水平。雷擊或雷電波攻擊，由于電流非常高的殘壓，使附近設(shè)備受到反擊的威脅，并減少接地網(wǎng)保護(hù)設(shè)備（架空輸電線路和變電所用電設(shè)備）帶電導(dǎo)體抗射線水平，達(dá)不到設(shè)計(jì)要求而損壞設(shè)備。</p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);"><br/></p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);"> 接地系統(tǒng)接地電阻的合格與否直接關(guān)系到變電站操作人員、變電站維修人員的人身安全；但由于土壤對(duì)接地裝置有腐蝕作用，隨著運(yùn)行時(shí)間的延長(zhǎng)，接地裝置已經(jīng)腐蝕，影響變電站運(yùn)行的安全；因此，必須大力加強(qiáng)網(wǎng)絡(luò)對(duì)接地電阻的定期監(jiān)測(cè)；運(yùn)行變電站網(wǎng)絡(luò)接地電阻測(cè)量，較大的系統(tǒng)干擾網(wǎng)電流流入以及測(cè)試引線之間的干擾，使測(cè)試結(jié)果誤差。尤其是大接地電阻?。ㄒ话阍?.5Ω以下），即使是細(xì)微的干擾測(cè)試結(jié)果也會(huì)產(chǎn)生巨大的影響；對(duì)網(wǎng)絡(luò)接地電阻測(cè)試不準(zhǔn)確，不僅會(huì)損壞設(shè)備，還會(huì)造成此類接地網(wǎng)絡(luò)誤變?cè)斐刹槐匾膿p失，結(jié)合我的接地阻抗測(cè)試方法總結(jié)如下：</p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);"><br/></p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);">　　一、接地電阻測(cè)試原理和方法：</p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);"><br/></p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);">　　測(cè)試接地方式接地阻抗電流電極盡量布置在正常電流極與試驗(yàn)接地裝置dcG邊緣的距離應(yīng)為試驗(yàn)接地裝置最大對(duì)角線長(zhǎng)度D的4～5倍（平行布線法），2倍以上（三角形接線法理想地區(qū)土壤電阻率均勻），電壓引線長(zhǎng)度為電流引線長(zhǎng)度的0.618倍（扁線接線法）或等于電流線（三角形接線法）。</p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);"><br/></p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);">　　1、E極在使用三極測(cè)量時(shí)必須與P1一起短接，本地網(wǎng)絡(luò)接地電阻小，本地網(wǎng)絡(luò)接地電阻?。ā?.5Ω），以提高測(cè)量精度，減少儀器和接地網(wǎng)絡(luò)測(cè)量引線電阻和接觸電阻測(cè)量結(jié)果可以解開EP短接；減少單獨(dú)引線連接到接地網(wǎng)絡(luò)測(cè)試點(diǎn)造成的接觸電阻誤差。</p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);"><br/></p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);">　　注：</p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);"><br/></p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);">　　1、E——接被測(cè)網(wǎng)絡(luò)；</p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);"><br/></p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);">　　2、P1——接被測(cè)網(wǎng)絡(luò)；</p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);"><br/></p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);">　　3、P2——然后測(cè)量電壓線（0.618倍電流線長(zhǎng)度）；</p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);"><br/></p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);">　　4 C——接測(cè)量電流線（其長(zhǎng)度取地網(wǎng)，對(duì)角線長(zhǎng)度的4～5倍）；</p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);"><br/></p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);">　　二、檢測(cè)注意事項(xiàng)及意義</p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);"><br/></p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);">　　接地裝置的大部分特性參數(shù)與土壤水分密切相關(guān)，對(duì)裝置狀態(tài)的地面評(píng)估和驗(yàn)收試驗(yàn)應(yīng)盡量在旱季和土壤濕度大的情況下進(jìn)行。不結(jié)冰，不宜在打雷、下雨、下雪或雨雪過(guò)后立即進(jìn)行。實(shí)測(cè)為我們的整改提供了可靠依據(jù)。建議對(duì)變電站接地條件進(jìn)行整改優(yōu)化，使接地網(wǎng)的接地電阻滿足要求，從而有效防止因跨步電壓對(duì)設(shè)備絕緣損壞造成人身傷害或設(shè)備損壞。發(fā)揮保證電氣設(shè)備安全運(yùn)行的作用，為變電站工作人員營(yíng)造安全放心的工作環(huán)境。</p> </div> <div id="cowcq0oa" class="pagetb"> <p> 上一條：<a href="/Article-3045419.html">DCL-T塔式感應(yīng)加熱器產(chǎn)品性能特點(diǎn)</a></p> <p> 下一條：<a 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