架空输电线路绕击与反击仿真分析及辨识  

Simulation and Monitoring of Shielding Failure and Back Striking on Overhead Transmission Lines

作　　者：吴彪[1] 赵淳[1] 

机构地区：[1]国网电力科学研究院武汉南瑞有限责任公司,湖北武汉430074

出　　处：《水电能源科学》2013年第10期176-179,共4页Water Resources and Power

摘　　要：针对架空输电线路事故中绕击、反击的辨识十分困难问题,根据架空输电线路绕、反击特点,采用电力系统电磁暂态仿真软件ATPDraw构建了输电线路、杆塔、绝缘子等仿真模型,对某220kV单回输电线路雷击与非雷击故障及绕、反击暂态过程进行了仿真,分析了不同情况下故障暂态电流极性、幅值、陡度的特征差异,并基于不同情况下导线和避雷线上故障暂态电流波形的参数提出了相应的实时监测方案。结果表明,该方案可实现对输电线路雷击过程中绕、反击的辨识。In view of the difficulty in distinguishing between back striking and shield failure in the lightning fault of o- verhead transmission lines and after comparing their characteristics, this paper establishes models for overhead transmis- sion lines, pole and insulator using ATPDraw. Therefore, the cases for non-lightning fault, back striking and shielding failure are simulated based on a real 220 kV single-circuit transmission lines and an analysis of characteristic differences including polarity, amplitude and gradient of fault current among them is made. Moreover, a real-time monitoring scheme is proposed according to the parameters of fault current in conductor and ground wire. Operation results prove that the scheme is able to distinguish between back strike and shield failure in overhead transmission lines.

关 键 词：输电线路 雷击 绕击 反击 实时监测 

分 类 号：TM863[电气工程—高电压与绝缘技术]