输电线路雷击灾害风险层进式评估体系的构建  

The Construction of a Risk Assessment System for Lightning Stroke on Transmission Lines

作　　者：王平[1] 李琳[1] 

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206

出　　处：《电瓷避雷器》2014年第2期71-76,共6页Insulators and Surge Arresters

基　　金：河北省电力公司科技项目(编号:kj2012-039)

摘　　要：在深入研究各种输电线路雷击跳闸率计算方法并结合目前各网省公司线路管理现状的基础上,提出了输电线路雷击跳闸率预评估、再评估的层进式评估流程,并利用Visual Studio高级程序设计语言开发了一套输电线路雷击跳闸风险评估系统。该风险评估系统综合应用规程法、改进电气几何模型(EGM)、Google Earth地理信息软件和ATP/EMTP仿真计算等技术,评估范围覆盖了雷电绕击、反击等主要雷害型式,评估模型涉及线路地理特征信息、线路结构特征信息等影响要素,评估结果量化分析了各要素对雷击风险的影响,拓宽了输电线路防雷技术的思路及领域。笔者应用开发的雷击灾害风险评估系统对一条实际的输电线路进行雷击风险评估,并分析了该线路某次历史跳闸的原因。Based on the deep research on the calculation methods of lightning failure rate, and combining with the transmission line management circumstance of the power network companies, a set of evaluation process covering pre-assessment and re-evaluation hierarchical technique is proposed, and develops a set of transmission lines lightning risk assessment system by Microsoft Visual Studio. The assessment system adopts technologies of regulation method, the improved Electrical Geometric Model （EGM） method, Google Earth geographical information software and ATP/EMTP simulation computing etc, the assessment areas cover the main lightning failure types such as shielding failure and back striking, the evaluation models involve the influential factors such as the geographical distributed features and the structure feature information of the transmission lines, the influence of the factors to the lightning stoke on transmission lines is quantitative analyzed by the assessment results, this method widens the thoughts of lightning protection technology. Finally, the lightning stroke risk assessment of a practical transmission line is carried out by the risk assessment system, and the cause of a history lightning stoke failure is analyzed.

关 键 词：输电线路 雷击风险 绕击跳闸率 反击跳闸率 

分 类 号：TM863[电气工程—高电压与绝缘技术]