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新型10kV架空線路并聯(lián)間隙防雷裝置的研制

發(fā)布時間:2019-02-16 06:40
【摘要】:在電力系統(tǒng)中,輸電線路是最為重要的設(shè)備之一。輸電線路往往涉及長度大,所處的環(huán)境較為復(fù)雜問題,其運行的可靠程度直接影響電網(wǎng)安全運行。而絕緣子串是架空輸電線路中的重要組成部分,在高壓輸電線路中起支撐導(dǎo)線并使之與桿塔絕緣的作用。我國現(xiàn)有并聯(lián)間隙大部分用于35kV、110kV、220kV電壓等級的架空線路上,但現(xiàn)有10kV架空線路并聯(lián)間隙的研制尚為空白。本文以10kV架空線路的并聯(lián)間隙為研制對象,針對現(xiàn)有并聯(lián)間隙耐電弧燒蝕能力較差,導(dǎo)致其使用壽命較低的問題展開研究工作。本文擬尋求良好的耐電弧燒蝕性能的材料,通過提高并聯(lián)防雷間隙的使用壽命,降低線路運行維護費用,來實現(xiàn)架空輸電線路的安全運行。本文主要有以下內(nèi)容:1、對并聯(lián)間隙的材質(zhì)進行研制。將耐燒蝕銅鎢合金替代普通碳素鋼作為并聯(lián)間隙上、下電極材質(zhì)。通過短路電流、真空放電、中性鹽霧試驗和鹽水浸泡試驗分別進行驗證,得出結(jié)論是耐燒蝕銅鎢合金的耐電弧侵蝕、耐腐蝕能力均大大優(yōu)于普通碳素鋼材。2、對并聯(lián)間隙的結(jié)構(gòu)進行設(shè)計,并加工成樣品。3、對并聯(lián)間隙進行電氣性能研究。通過50%雷電放電電壓試驗、工頻電壓試驗和工頻大電流燃弧試驗,檢驗新型并聯(lián)間隙的防雷性能。4、對本文研制的新型并聯(lián)間隙進行應(yīng)用效果分析。該裝置現(xiàn)在泉州市10kV龍通線架空線路上得到應(yīng)用。經(jīng)過1年雷雨季節(jié)的考驗,己有多次動作記錄,實踐證明該裝置的防雷效果良好。最后,對本文所做的工作進行了總結(jié)。
[Abstract]:Transmission line is one of the most important equipments in power system. Transmission lines often involve large length and complex environment. The reliability of transmission lines directly affects the safe operation of power grid. The insulator string is an important part of overhead transmission line, which plays the role of supporting the conductor and insulating it from the tower in the high voltage transmission line. Most of the existing parallel gaps in China are used on overhead lines with 35 kV / 110kV / 220kV voltage grade, but the development of the parallel gap of the existing 10kV overhead lines is still blank. In this paper, the parallel gap of 10kV overhead line is taken as the research object, aiming at the problem of poor arc ablation resistance of the existing parallel gap, which leads to its low service life. In this paper, we are looking for materials with good arc ablation resistance to achieve the safe operation of overhead transmission lines by increasing the service life of the parallel lightning gap and reducing the operating and maintenance costs of the lines. The main contents of this paper are as follows: 1. The material of parallel clearance is developed. Ablation-resistant copper-tungsten alloy was replaced by ordinary carbon steel as parallel gap and lower electrode material. Through short circuit current, vacuum discharge, neutral salt spray test and brine immersion test, it is concluded that the arc corrosion resistance of ablative copper tungsten alloy is much better than that of common carbon steel. The structure of parallel gap is designed and processed into sample. 3. Electrical performance of parallel gap is studied. Through 50% lightning discharge voltage test, power frequency voltage test and power frequency large current arc burning test, the lightning protection performance of the new parallel gap is tested. 4. The application effect of the new parallel gap developed in this paper is analyzed. The device is now used on the overhead line of 10kV Longtong Line in Quanzhou City. After one year thunderstorm season test, there have been many action records, the practice proves that the lightning protection effect of the device is good. Finally, the work done in this paper is summarized.
【學(xué)位授予單位】:華僑大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:TM862

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