长间隙鸟粪闪络机理及危险区域划分仿真研究  

Simulation Research on Long Gap Bird Streamer Flashover Mechanism and Its Risk Area Compartment

作　　者：胡峰 

机构地区：[1]广东电网有限责任公司肇庆供电局,广东肇庆526000

出　　处：《电瓷避雷器》2016年第6期50-55,共6页Insulators and Surge Arresters

摘　　要：鸟粪闪络故障在输电线路上屡见不鲜,在220 kV及以下等级输电线路上发生次数更是居高不下,近年来又报道了数起500 kV等级鸟粪闪络事故。已有的研究多针对220 kV及以下电压等级,有关500 kV及以上等级长间隙鸟粪闪络研究较少。以典型500 kV输电线路鸟粪闪络为研究对象,通过Ansoft有限元分析软件搭建了三维仿真模型,模拟了鸟粪沿导线正上方下落、侧上方下落以及一段鸟粪下落动态过程中空气间隙电场及电位分布,解释了500 kV等级长间隙鸟粪闪络机理,以此为依据,又进一步通过分析计算给出了容易发生鸟粪闪络的危险区域,给500 kV等级线路防护鸟粪闪络提供了数据支撑。Bird streamer flashover fault on transmission line are very common, which occurs very frequently in 220 kV and below transmission lines, what＇s more, bird steamer flashover fault happened even on 500 kV transmission lines in recent years. However, the previous research about flashover fault is mostly about 220 kV and below level, while research on long gap bird streamer flashover at 500 kV and above is seldom reported. The present study takes 500 kV bird flashover fault as the research object and build 3D simulation model by finite element analysis software, and then the bird streamer fails on the conductor from above and side above are simulated as well as the air gap field and potential distribution when streamer drops, the 500 kV level long gap bird streamer flashover mechanism is explained. Based on this, the risk area in which bird streamer flashover may easily happen is provided by further analysis and calculations, providing data support for 500kV grade line streamer flashover protection.

关 键 词：鸟粪闪络 长间隙 有限元分析 电场分布 危险区域 

分 类 号：TM75[电气工程—电力系统及自动化]