本文選題：輸電線路 + 綜合防雷��； 參考：《華北電力大學(xué)》2014年碩士論文

【摘要】：雷電活動(dòng)是一個(gè)復(fù)雜的自然現(xiàn)象,需要電力系統(tǒng)內(nèi)各個(gè)部門、各個(gè)環(huán)節(jié)的通力合作,才能盡量減少雷害的發(fā)生,將雷害帶來(lái)的損失降到最低。防雷措施需考慮地形狀態(tài)、雷電活動(dòng)規(guī)律、線路特點(diǎn)等因素,等采用一種或幾種有效的綜合措施,才能達(dá)到最佳的防雷效果。為防止和減少雷害故障,在進(jìn)行線路防雷工作時(shí),既要全面考慮高壓輸電線路經(jīng)過(guò)地區(qū)雷電活動(dòng)的強(qiáng)弱程度、地形地貌特點(diǎn)和接地電阻高低等情況,還要結(jié)合原有高壓輸電線路運(yùn)行經(jīng)驗(yàn)以及系統(tǒng)的運(yùn)行方式等,通過(guò)技術(shù)經(jīng)濟(jì)比較選取合理的防雷措施。 本文根據(jù)張家口地區(qū)的特點(diǎn),進(jìn)行了高壓輸電線路綜合防雷措施的研究與應(yīng)用,首先對(duì)張家口地區(qū)高壓輸電線路所處地形特征、基礎(chǔ)雷電參數(shù)及桿塔接地電阻的情況進(jìn)行了統(tǒng)計(jì)分析,利用ATP以及電氣幾何模型,獲得了桿塔接地電阻、線路絕緣配置、線路保護(hù)角及地面傾角等四大典型因素對(duì)輸電線路防雷水平影響,通過(guò)反擊耐雷水平、反擊跳閘率、繞擊跳閘率及總雷擊跳閘率的計(jì)算,對(duì)典型110kV和220kV高壓輸電線路的雷害風(fēng)險(xiǎn)進(jìn)行了分析和評(píng)估,最后根據(jù)張家口地區(qū)的具體特點(diǎn),提出相應(yīng)的防雷措施的改造。結(jié)果表明,本文所提出的高壓輸電線路綜合防雷措施,可以有效的降低輸電線路的雷擊跳閘率,有助于科學(xué)、全面的指導(dǎo)地區(qū)線路防雷工作,并對(duì)今后防雷工作的實(shí)施具有一定的借鑒作用。
[Abstract]:Lightning activity is a complex natural phenomenon, which requires the cooperation of all departments and links in the power system to minimize the occurrence of lightning damage and reduce the losses caused by lightning damage to the minimum. In order to achieve the best lightning protection effect, one or several effective comprehensive measures should be taken into account in lightning protection measures, such as terrain state, lightning activity law, line characteristics and so on. In order to prevent and reduce lightning damage, it is necessary to take into account the intensity of lightning activity, topographic features and grounding resistance of high voltage transmission lines in the lightning protection work. Combined with the operation experience of the original HV transmission line and the operation mode of the system, reasonable lightning protection measures are selected through the comparison of technology and economy. According to the characteristics of Zhangjiakou area, the comprehensive lightning protection measures for high voltage transmission lines are studied and applied in this paper. Firstly, the topographic characteristics of high voltage transmission lines in Zhangjiakou area are analyzed. The basic lightning parameters and the grounding resistance of the tower are statistically analyzed. By using ATP and the electrical geometry model, the grounding resistance of the tower and the insulation configuration of the transmission line are obtained. Four typical factors, such as line protection angle and ground inclination angle, affect the lightning protection level of transmission line. The calculation of lightning resistance level, tripping rate, tripping rate and total lightning tripping rate are carried out. The lightning hazard risk of typical 110kV and 220kV HV transmission lines is analyzed and evaluated. Finally, according to the specific characteristics of Zhangjiakou area, the corresponding lightning protection measures are put forward. The results show that the comprehensive lightning protection measures proposed in this paper can effectively reduce the lightning tripping rate of transmission lines, and help to guide the lightning protection work in the area scientifically and comprehensively. It can be used for reference for the implementation of lightning protection in the future.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM863

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