1000kV交流紧凑型输电线路杆塔空气间隙放电特性  

Air-gaps Flashover Characteristics for 1000kV AC Compact Tower

作　　者：霍锋[1] 胡伟[1] 徐涛[1] 曹晶[1] 谢雄杰[1] 谢梁[1] 

机构地区：[1]国网电力科学研究院,武汉430074

出　　处：《高电压技术》2011年第8期1875-1881,共7页High Voltage Engineering

基　　金：国际科技合作项目(2008DFR60010)~~

摘　　要：为了进一步提高特高压线路输电容量,建设节能环保型输电工程,在特高压试验示范工程建成投运后,需着手开展特高压紧凑型输电技术研究工作。为系统掌握1000 kV特高压紧凑型线路空气间隙外绝缘放电特性,为后续工程绝缘设计提供技术支撑,采用全尺寸特高压紧凑型塔窗,对不同相V型串空气间隙进行了标准操作冲击、1000μs长波前操作冲击、雷电冲击放电特性试验研究,获得了多条重要的放电特性参数。根据试验结果及过电压仿真结论,分析了1000 kV特高压紧凑型线路的绝缘配合问题,提出了我国单回特高压紧凑型线路最小安全间隙推荐值,在海拔500 m、1000 m条件下,安全间隙(对横梁/对斜边)取7.3m/6.9m和7.5m/7.1m。In order to get the air-gap characteristics parameters of tower for 1000 kV AC compact transmission line, and to supply a base of project design in the future, we experimentally studied the flashover characteristics of ＇V＇ string air-gaps at the standard switching impulse voltage, long wave-front（ 1000 μs） switching impulse voltage, and standard lightning impulse voltage, by adopting full scale tower window. By the test, we got several important air- gap flashover characteristics curves. According to the test results and the overvohage simulation conclusion, we an- alyzed the insulation co-ordination problem and suggested the minimum safe insulation air-gaps. Under the premise of enough external insulation safety in operation, the conclusion can be used to optimize the tower design and reduce the project cost.

关 键 词：1000 kV交流紧凑型线路 全尺寸塔窗 长波前冲击电压 外绝缘 操作过电压 绝缘配合 

分 类 号：TM855[电气工程—高电压与绝缘技术]