泰州地区110kV输电线路防雷技术研究
发布时间：2019-05-14 19:48
【摘要】：我国经济的快速增长伴随着电需求迅速扩大,电力系统规模也在逐渐扩大,对电网的安全运行和可靠供电提出了更高的要求。泰州地区满足用户的电力需求和经济需要不断增加地区内的装机容量、建设网架结构。泰州电网是江苏的重要枢纽,影响着江苏电网甚至华东电网的安全与稳定。泰州地区由雷击引起的输电线路跳闸事故呈上升趋势,已严重影响电力系统的正常运行,急需总结分析并提出相应的改进措施。为解决泰州地区输电线路的防雷措施不足的问题,本文在详细了解全面的防雷措施的前提下进行了防雷方案的研究。本文首先认真分析泰州地区雷击现状,对该地区电网概况、输电线路进行统计。认真分析了泰州地区的雷电环境和雷击跳闸情况,总结出该地区雷击跳闸原因的一般规律。然后对泰州地区常用防雷技术措施进行试验分析,验证这些措施的应用效果,包括降低接地电阻、增加防雷设备和其他防雷技术。对输电线路雷击跳闸风险等级划分,并以泰州地区110kV生马线为例,进行雷击跳闸风险评估,根据评估结果提出针对性具体的防雷改造措施,包括:提高线路杆塔的绝缘水平、降低杆塔接地电阻,减小避雷线保护角、使用线路避雷器以及采用不平衡绝缘等,减少该线路雷害事故的发生。通过防雷治理前后数据表明,基于线路风险等级划分的防雷技术应用效果显著。
[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.
【学位授予单位】：华北电力大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM863
本文编号：2477000
[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.
【学位授予单位】：华北电力大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM863
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