本文關(guān)鍵詞： 配電線路 防雷策略 差異化 改造　出處：《吉林大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：雷電是大自然中極具破壞力的一種放電現(xiàn)象,給人類生產(chǎn)生活、特別是電力設(shè)施等帶來極大的影響。廣東省清遠(yuǎn)市位于北江中下游平原和山區(qū)相互交接的地帶,由于其特別的地貌,非常容易導(dǎo)致雷電等強(qiáng)對流天氣的發(fā)生,年平均雷電日數(shù)超過90天,雷電活動強(qiáng)烈。10k V架空線路是清遠(yuǎn)地區(qū)配電網(wǎng)的主要組成部分,由于該電壓等級電網(wǎng)絕緣水平較低、分布廣泛,易遭受雷害,長期以來,導(dǎo)致清遠(yuǎn)地區(qū)10k V配電線路跳閘的首要原因即為雷擊。2014年清遠(yuǎn)地區(qū)10k V架空配電線路因雷擊引起的故障占10k V中壓線路故障總數(shù)的30%,雷電已成為造成配電設(shè)備運(yùn)行的主要危害,嚴(yán)重影響設(shè)備運(yùn)行安全性和供電可靠性,也大大增加故障搶修頻次與搶修過程中的人身風(fēng)險(xiǎn)。為有效降低10k V架空配電線路雷擊故障次數(shù),本文通過對近年來清遠(yuǎn)系統(tǒng)內(nèi)配網(wǎng)以往防雷工作經(jīng)驗(yàn)和成果進(jìn)行分析與提煉,運(yùn)用大數(shù)據(jù)和ATP-EMTP仿真分析技術(shù)研究建立了10k V架空線路防雷決策信息系統(tǒng)模型,以系統(tǒng)和仿真計(jì)算分析為決策支撐,重點(diǎn)對線路絕緣配置、防雷裝置及架空避雷線仿真分析,接地裝置優(yōu)化、避雷器輪換等進(jìn)行分析研究,形成符合清遠(yuǎn)地區(qū)特點(diǎn)的系統(tǒng)性綜合防雷策略。本防雷策略注重對線路絕緣水平進(jìn)行研究與分析,科學(xué)選配防雷裝置,因地制宜提出差異化防雷技術(shù)要求,實(shí)現(xiàn)了10k V架空配電線路絕緣配置更加科學(xué)精準(zhǔn),防雷裝置配置更加經(jīng)濟(jì)合理、地網(wǎng)接地更加簡便可靠,充分體現(xiàn)了綜合防雷、差異化防雷、精準(zhǔn)防雷的思想理念,有效解決了清遠(yuǎn)地區(qū)以往10k V架空配電線路防雷手段單一、盲目、缺乏科學(xué)依據(jù)等問題。本文還詳細(xì)介紹了兩項(xiàng)防雷改造實(shí)際案例,有效驗(yàn)證防雷策略及相關(guān)研究成果的實(shí)用性和有效性。通過研究與運(yùn)用防雷策略,可以促進(jìn)清遠(yuǎn)地區(qū)配網(wǎng)防雷工作的規(guī)范化、標(biāo)準(zhǔn)化,提高防雷措施的針對性、有效性,有效減少清遠(yuǎn)地區(qū)10k V配網(wǎng)雷擊故障次數(shù),降低雷害引發(fā)的相關(guān)風(fēng)險(xiǎn),提升設(shè)備健康水平和供電可靠性。
[Abstract]:Lightning is a very destructive discharge phenomenon in nature, which has a great impact on human production and life, especially on power facilities. Qingyuan City of Guangdong Province is located in the middle and lower reaches of the Beijiang River plain and mountain areas intersected. Due to its special geomorphology, it is very easy to cause severe convective weather such as lightning and lightning, with the annual average number of lightning days exceeding 90 days. Strong lightning activity .10kV overhead line is the main component of Qingyuan distribution network, because of the low insulation level of the voltage grade grid, widely distributed, vulnerable to lightning damage, for a long time. Lightning strike is the primary cause of 10kV power distribution line tripping in Qingyuan area. In 2014, 10kV overhead distribution line in Qingyuan area was caused by lightning strike, which accounted for 10k. 30% of the total number of V medium voltage line failures. Lightning has become a major hazard to the operation of distribution equipment, seriously affecting the safety of equipment operation and power supply reliability. It also greatly increases the frequency of emergency repair and personal risk in the process of emergency repair. In order to effectively reduce the 10kV overhead distribution line lightning failure times. This paper analyzes and refines the experience and achievements of lightning protection in Qingyuan distribution network in recent years. Based on the research of big data and ATP-EMTP simulation analysis technology, the decision information system model of 10kV overhead line lightning protection is established, which is supported by system and simulation calculation and analysis. Focus on the line insulation configuration, lightning protection device and overhead lightning protection line simulation analysis, grounding device optimization, lightning arrester rotation and so on. The lightning protection strategy focuses on the research and analysis of the line insulation level, the scientific selection of lightning protection devices, and puts forward the technical requirements of differentiated lightning protection according to the local conditions. The insulation configuration of 10kV overhead distribution line is more scientific and accurate, the lightning protection device is more economical and reasonable, the grounding of ground grid is more simple and reliable, which fully reflects the comprehensive lightning protection and differential lightning protection. The idea of accurate lightning protection effectively solves the problem of single and blind lightning protection for 10kV overhead distribution lines in Qingyuan area. Lack of scientific basis and other issues. This paper also introduces two practical cases of lightning protection transformation, effectively verify the practicality and effectiveness of lightning protection strategy and related research results. Through the research and application of lightning protection strategy. It can promote the standardization and standardization of lightning protection of distribution network in Qingyuan area, improve the pertinence and effectiveness of lightning protection measures, and effectively reduce the lightning failure times of 10kV distribution network in Qingyuan area. Reduce the risk caused by lightning damage, improve equipment health and reliability of power supply.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM863

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