共 8 条
高海拔地区±800KV特高压直流线路空气间隙操作冲击放电特性(英文)
被引：6
作者：
廖永力
[1
]
高超
[1
]
李锐海
[1
]
王国利
[1
]
马仪
[2
]
机构：
[1] Electric Power Research Institute,China Southern Power Grid Co,Ltd
[2] Electric Power Research Institute of Yunnan Power Grid Co,Ltd
来源：
关键词：
ultra high voltage direct current(UHVDC);
±800 kV transmission line;
external insulation;
air gap;
high altitude;
switching overvoltage;
switching impulse;
D O I：
暂无
中图分类号：
TM75 [线路及杆塔];
学科分类号：
080802 ;
摘要：
This paper is concerning switching impulse air gap insulation characteristics of rod-to-plane and V-string 6-conductor bundle to tower body in ±800 kV transmission lines.The tests were performed in China Southern Power Grid Co.,Ltd.(CSG) Kunming outdoor UHV laboratory at an altitude of 2 100 m.The switching impulse strength performance were obtained at a rod-to-plane arrangement and a full-scale model of 6-conductor bundle to tower.The test gap length of the typical rod-to-plane arrangement is 1.5～10 m and 5.3～8.2 m for the conductor-tower model,and the range of test voltage is about 450～3 100 kV.The critical positive switching impulse strength of conductor-tower gap is 1 525 kV in the gap length of 6.2 m.Additionally,the influence of the wave front time(100～1 700 μs) on the 50% flashover voltage is discussed.According to the test data,the minimum air gap clearances of the conductor-tower model with V-insulators at the altitude of 2 100 m should be longer than 6.8 m(wave front time 250 μs) and 5.8 m(wave front time 1 000 μs),respectively.The results are useful to air gap insulation design in UHVDC systems with rated voltage of ±800 kV.
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页码：3161 / 3165
页数：5
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