本文關(guān)鍵詞： 輸電線路 地線絕緣子 接地電阻 感應(yīng)電壓 感應(yīng)電流　出處：《電瓷避雷器》2017年05期 　論文類型：期刊論文

【摘要】：架空地線絕緣子間隙被外力改變或遭受過電壓作用下會(huì)發(fā)生間隙性擊穿,嚴(yán)重時(shí)會(huì)出現(xiàn)持續(xù)燃弧的現(xiàn)象,實(shí)時(shí)監(jiān)測地線上的電流變化情況對(duì)于架空地線的可靠運(yùn)行意義重大。通過PSCAD仿真軟件,建立輸電線路模型,計(jì)算正常運(yùn)行情況下的地線電流并分析影響因素并通過電弧開斷模型分別分析了間隙擊穿時(shí)刻、電弧持續(xù)時(shí)間、多點(diǎn)間隙擊穿等因素對(duì)地線電流的影響,結(jié)果表明,線路的電壓與地線電流呈正比,而電流與接地電阻不影響地線電流。同時(shí),間隙擊穿的位置、時(shí)刻和持續(xù)時(shí)間均會(huì)對(duì)擊穿曲線產(chǎn)生不同程度影響。研究結(jié)果為架空輸電線路地線狀態(tài)監(jiān)測提供思路和理論依據(jù)。
[Abstract]:The gap of the overhead ground wire insulator is changed by external force or overvoltage will occur gap breakdown, serious will appear the phenomenon of continuous arc burning. The real-time monitoring of the current change on the ground wire is of great significance for the reliable operation of the overhead ground wire. The transmission line model is established by PSCAD simulation software. The ground current under normal operation is calculated and the influence factors are analyzed. The effects of gap breakdown time arc duration and multi-point gap breakdown on ground current are analyzed by arc breaking model. The results show that the voltage of the line is proportional to the ground current, while the current and the grounding resistance have no effect on the ground current. At the same time, the location of gap breakdown is not affected. Both the time and duration have different effects on the breakdown curve, and the results provide a theoretical basis for the ground line condition monitoring of overhead transmission lines.
【作者單位】： 國家電網(wǎng)湖北省電力公司檢修公司;
【分類號(hào)】：TM75
【正文快照】： 0引言目前國內(nèi)500 k V及以上交流超、特高壓輸電線路大多采用地線分段絕緣(每段長10~30 km)、一點(diǎn)接地的運(yùn)行方式,正常運(yùn)行時(shí)無感應(yīng)電流通路,能量損耗很小,避雷線起著保護(hù)輸電線路不易遭受雷擊的重要作用,但同時(shí)它也增加了線路中的電能損耗。而對(duì)于超、特高壓的線路來說,其輸，

本文編號(hào)：1467283