【摘要】：我國經(jīng)濟(jì)的快速增長伴隨著電需求迅速擴(kuò)大,電力系統(tǒng)規(guī)模也在逐漸擴(kuò)大,對電網(wǎng)的安全運(yùn)行和可靠供電提出了更高的要求。泰州地區(qū)滿足用戶的電力需求和經(jīng)濟(jì)需要不斷增加地區(qū)內(nèi)的裝機(jī)容量、建設(shè)網(wǎng)架結(jié)構(gòu)。泰州電網(wǎng)是江蘇的重要樞紐,影響著江蘇電網(wǎng)甚至華東電網(wǎng)的安全與穩(wěn)定。泰州地區(qū)由雷擊引起的輸電線路跳閘事故呈上升趨勢,已嚴(yán)重影響電力系統(tǒng)的正常運(yùn)行,急需總結(jié)分析并提出相應(yīng)的改進(jìn)措施。為解決泰州地區(qū)輸電線路的防雷措施不足的問題,本文在詳細(xì)了解全面的防雷措施的前提下進(jìn)行了防雷方案的研究。本文首先認(rèn)真分析泰州地區(qū)雷擊現(xiàn)狀,對該地區(qū)電網(wǎng)概況、輸電線路進(jìn)行統(tǒng)計。認(rèn)真分析了泰州地區(qū)的雷電環(huán)境和雷擊跳閘情況,總結(jié)出該地區(qū)雷擊跳閘原因的一般規(guī)律。然后對泰州地區(qū)常用防雷技術(shù)措施進(jìn)行試驗分析,驗證這些措施的應(yīng)用效果,包括降低接地電阻、增加防雷設(shè)備和其他防雷技術(shù)。對輸電線路雷擊跳閘風(fēng)險等級劃分,并以泰州地區(qū)110kV生馬線為例,進(jìn)行雷擊跳閘風(fēng)險評估,根據(jù)評估結(jié)果提出針對性具體的防雷改造措施,包括:提高線路桿塔的絕緣水平、降低桿塔接地電阻,減小避雷線保護(hù)角、使用線路避雷器以及采用不平衡絕緣等,減少該線路雷害事故的發(fā)生。通過防雷治理前后數(shù)據(jù)表明,基于線路風(fēng)險等級劃分的防雷技術(shù)應(yīng)用效果顯著。
[Abstract]:The rapid growth of our country's economy is accompanied by the rapid expansion of the electric demand, and the scale of the power system is gradually expanding, and the higher requirements are put forward for the safe operation and reliable power supply of the power grid. In Taizhou, the user's electricity demand and economy need to continuously increase the installed capacity in the area, and construct the grid structure. Taizhou power network is an important hub of Jiangsu, which influences the safety and stability of the Jiangsu power grid and even the East China power grid. The rising trend of the trip accident of the power transmission line caused by the lightning strike in Taizhou area has seriously affected the normal operation of the power system, and the analysis and corresponding improvement measures are urgently needed. In order to solve the problem that the lightning protection measures of the power transmission line in Taizhou area are not sufficient, the paper studies the lightning protection scheme on the premise of detailed understanding of the comprehensive lightning protection measures. In this paper, the current situation of lightning strike in Taizhou area is analyzed and the situation of the power grid in the region is analyzed. The lightning environment and the lightning trip condition in Taizhou area are analyzed and the general rule of the cause of lightning trip in this area is summarized. Then, the lightning protection measures in Taizhou area are tested and analyzed, and the application effect of these measures is verified, including the reduction of the grounding resistance, the increase of the lightning protection equipment and other lightning protection technologies. The risk grade of the lightning trip of the power transmission line is divided, and a lightning trip risk assessment is carried out based on the 110kV raw horse line in the Taizhou area, and the specific lightning protection modification measures are put forward according to the evaluation result, which comprises the following steps of: improving the insulation level of the line pole tower and reducing the grounding resistance of the tower, The protection angle of the line is reduced, the line lightning arrester is used and the unbalanced insulation is adopted to reduce the occurrence of the lightning damage accident of the line. The data from the front and back of the lightning protection control shows that the lightning protection technology based on the line risk level has a remarkable application effect.
【學(xué)位授予單位】：華北電力大學(xué)(北京)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM863

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