高压输电线路综合防雷措施的研究与应用

发布时间：2018-06-14 19:32

本文选题：输电线路 + 综合防雷　；参考：《华北电力大学》2014年硕士论文

【摘要】：雷电活动是一个复杂的自然现象,需要电力系统内各个部门、各个环节的通力合作,才能尽量减少雷害的发生,将雷害带来的损失降到最低。防雷措施需考虑地形状态、雷电活动规律、线路特点等因素,等采用一种或几种有效的综合措施,才能达到最佳的防雷效果。为防止和减少雷害故障,在进行线路防雷工作时,既要全面考虑高压输电线路经过地区雷电活动的强弱程度、地形地貌特点和接地电阻高低等情况,还要结合原有高压输电线路运行经验以及系统的运行方式等,通过技术经济比较选取合理的防雷措施。本文根据张家口地区的特点,进行了高压输电线路综合防雷措施的研究与应用,首先对张家口地区高压输电线路所处地形特征、基础雷电参数及杆塔接地电阻的情况进行了统计分析,利用ATP以及电气几何模型,获得了杆塔接地电阻、线路绝缘配置、线路保护角及地面倾角等四大典型因素对输电线路防雷水平影响,通过反击耐雷水平、反击跳闸率、绕击跳闸率及总雷击跳闸率的计算,对典型110kV和220kV高压输电线路的雷害风险进行了分析和评估,最后根据张家口地区的具体特点,提出相应的防雷措施的改造。结果表明,本文所提出的高压输电线路综合防雷措施,可以有效的降低输电线路的雷击跳闸率,有助于科学、全面的指导地区线路防雷工作,并对今后防雷工作的实施具有一定的借鉴作用。
[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.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM863

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