1000kV交流紧凑型输电线路相间空气间隙放电特性  

Air-gaps Flashover Characteristics of Phase-to-phase for 1000kV AC Compact Transmission Line

作　　者：徐涛[1] 霍锋[1] 万启发[1] 谢梁[1] 叶奇明[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1850-1856,共7页High Voltage Engineering

基　　金：国际科技合作项目(2008DFR60010)~~

摘　　要：为了解1000 kV特高压紧凑型输电线路相间空气间隙放电特性,获得相间空气间隙在模拟操作过电压条件下的放电特性参数,为相间绝缘间隙提供试验支撑,利用全尺寸特高压紧凑型塔窗,进行了塔窗内导线相间空气间隙操作冲击试验。并模拟档距中央的导线相间间隙,进行了标准操作冲击、1000μs长波前操作冲击放电特性试验研究。通过试验获得了多条重要的相间间隙操作冲击放电特性曲线,分析了不同电压分配系数α时长波前操作冲击电压相间放电特性的差异。研究结果表明,模拟线路档距中央相间(导线对导线)放电电压平均值较塔窗内相间(环对环)放电电压高3.9%。α取0.33、0.4和0.5时,放电电压与电压分配系数关系接近线性。In order to learn flashover characteristics of phase-to-phase air-gaps for 1000 kV UHV AC compact trans- mission line and to get all kinds of flashover characteristics parameters on the condition of switching overvoltage, which supply the test data for phase-to-phase insulation gap design, the switching impulse test on phase-to-phase air-gaps was carried out with the full-scale UHV compact tower. The standard switching impulse tests and 1000 t,s long wave-front switching impulse tests were carried out by the simulation of conductor-to-conductor gaps, and sev- eral important curves for transmission projects design were obtained. Test results show that the average flashover voltage of conductor-to-conductor air-gaps in the middle of span is 3.9% higher than that of ring-to-ring air-gaps in the tower window. When a is 0.33,0.4 and 0.5, the relation between flashover voltage and a is approximately linear.

关 键 词：特高压紧凑型输电线路 长波前冲击电压 外绝缘 相间操作过电压 绝缘配合 安全间隙 

分 类 号：TM723[电气工程—电力系统及自动化] TM855