摘要
输电线路电压等级越高,雷击跳闸的比例越大,分析了特高压输电线路反击特性,利用ATP/EMTP建立了仿真模型(包括多波阻抗杆塔、绝缘子串先导发展闪络和冲击接地阻抗模型),并对1 000 kV同塔双回输电线路的反击耐雷特性进行了研究。仿真结果表明,减小杆塔接地冲击电阻、采用逆相序布置,可以增强输电线路的反击耐雷水平,计及感应电压和工频电压的影响可以使计算结果更加真实可信。
The heightened transmission line voltage level leads to the increased lightning stroke tripping rate.In the light of the back-flashover characteristics of UHV transmission lines,this paper establishes an ATP-EMTP-based simulation model（including multi-wave impendence tower model,leader propagation model for flashover performance of insulator strings,and surge grounding resistance model） to study the back-flashover performance of 1000kV double-circuit transmission lines on the same tower.The simulation results show that the lighting stroke tripping rate is reduced by decreasing the surge grounding impendence of tower and that the counter-sequence of transmission lines can increase the back-flashover performance.The calculation results can be more reliable and accurate considering the inductive voltage and power frequency voltage.
出处
《华东电力》
北大核心
2011年第6期930-934,共5页
East China Electric Power
关键词
特高压
同塔双回
反击
闪络
先导发展模型
冲击接地阻抗模型
UHV
double-circuit transmission lines on the same tower
back-flashover
flashover
leader propagation model
surge grounding resistance model
