摘要
对110 kV及220 kV各3种杆塔模型,进行输电线路耐雷水平与雷击跳闸率的仿真计算与分析.计算结果为:有双避雷线的110 kV输电线路(单回线)的耐雷水平比单避雷线的输电线路约高37.2%～47.5%,有双避雷线的双回输电线路的耐雷水平比单回输电线路约低12.7%～10.4%.酒杯型铁塔的220 kV输电线路的耐雷水平比钢筋混凝土单杆约高19.0%～15.7%,比双回线铁塔约高12.6%～7.1%.山区的门型钢筋混凝土双杆塔110 kV单回输电线路的雷击跳闸率比平原线路高65.3%,山区的酒杯形铁塔220 kV单回输电线路的雷击跳闸率比平原线路高71.3%.
Simulated calculations and analyses about lightning proof ability and rate of frip by lightning strike have been earned out for three types of 220 kV and 110 kVtower models respectively. Results show as follows： The lightning proof abilities of single eircuit 110 kV transmission lines with double shielding wires are 37. 2 % -47.5 % higher than those with single shielding wire. The lighming proof abilities of double eircuit 110kV transmission lines with dowble shielding wires are 12.7% - 10.4% lower than those single eireuit lines. The lightning proof abilities of single eircuit 220 kV transmission lines with cup type steel lowers are 19.0 % - 15.7% higher than those with eonerete poles, and 12.6% -7.1% higher than those dowble eircuit lines. In mountain areas, the rates of trip by lightning strike on 110 kV single circuit lines with 11 type double eonerete poles are 65.3 % more than those in flat areas, and the rates of single eircuit 220 kV lines with cup type steel lowers are 71.3% over those in flat areas.
出处
《广西电力》
2005年第5期1-3,8,共4页
Guangxi Electric Power
关键词
架空输电线路
雷电过电压
仿真计算
雷击跳闸率
overhead transmission line
lighrning overvoltage
Simulated calculation
rate of trip by lightning strike
