同塔多回路架空线路雷击同跳模型研究与防雷技术设计

发布时间：2018-07-03 11:39

本文选题：雷击 + 同塔多回线路　；参考：《华北电力大学》2015年硕士论文

【摘要】：本文紧密结合浙江省电力公司所辖输电线路实际情况,从防雷基础理论方面和工程应用实践方面开展同塔多回路架空线路雷击同跳模型研究与防雷技术设计。本文研究了线路雷击分析方法,建立了适用于输电线路绕击过程分析的雷电先导分形模型,同时提出了一种计算分析复杂地形下输电线路绕击防雷性能的方法；本文对同塔多回线路雷击同跳模型进行研究,根据同塔多回线路不同回路各相绝缘子先导发展机理及其与绝缘击穿间隙之间的关系,在电磁暂态计算分析平台上实现同塔多回线路雷击同时闪络发展过程；利用110kV和220kV复合绝缘子并联间隙电弧的运动特性仿真,本文研究输电线路防雷措施；还对新建和已投运同塔多回线路的防雷配置提出了建议。主要研究雷电活动数据统计方法、雷电通道发展机理、雷电流入地散流优化及雷击同跳机理和雷击同跳特征等基础理论；基于典型线路的实际运行情况研究同塔多回输电线路耐雷水平影响因素,分析雷电流在杆塔中的传播和绝缘子击穿过程,结合同塔多回输电线路差异化防雷击同跳技术原理和雷击闪络风险等级大小,根据不同防雷措施的综合防护效果研究制定了典型线路的差异化防防雷击同跳技术方案。本文紧密结合浙江省电力公司所辖输电线路实际运行情况,从防雷基础理论方面和工程应用实践方面开展同塔多回架空输电线路同跳模型研究与防雷技术设计研究。
[Abstract]:Based on the actual situation of transmission lines under the jurisdiction of Zhejiang Electric Power Company, this paper carries out the research and design of lightning protection technology from the aspects of basic lightning protection theory and engineering application. In this paper, the lightning strike analysis method of transmission line is studied, and the fractal model of lightning forerunner is established, which is suitable for the analysis of transmission line around failure process. At the same time, a method to calculate and analyze the lightning protection performance of transmission line under complex terrain is put forward. In this paper, the lightning stroke and jump model of the same tower multicircuit line is studied. According to the development mechanism of the different phase insulators in different circuits of the same tower multicircuit line and the relationship between the lead of the insulator and the insulation breakdown gap, The development process of lightning strike and flashover of multi-circuit transmission lines in the same tower is realized on the platform of electromagnetic transient calculation and analysis, and the lightning protection measures of transmission lines are studied by using the simulation of the parallel gap arc motion characteristics of 110kV and 220kV composite insulators. Some suggestions on the lightning protection configuration of the newly built and operated multi-circuit lines of the same tower are also put forward. The basic theories such as the statistical method of lightning activity data, the development mechanism of lightning channel, the optimization of lightning current dispersion, the mechanism of lightning stroke and the characteristics of lightning stroke are studied. Based on the actual operation of typical transmission lines, the factors affecting the lightning resistance of multi-circuit transmission lines with the same tower are studied, and the propagation of lightning current in the tower and the process of insulator breakdown are analyzed. Combined with the principle of differential lightning protection and the risk level of lightning flashover of multi-circuit transmission lines of the same tower, according to the comprehensive protective effect of different lightning protection measures, a typical technical scheme of line differential lightning protection and simultaneous jump protection is established. Based on the actual operation of transmission lines under the jurisdiction of Zhejiang Electric Power Company, this paper develops the research on the same jump model and lightning protection technology of multi-circuit overhead transmission lines in the same tower from the aspects of basic lightning protection theory and engineering application.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM75;TM863

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