摘要
研究了在35 kV输电线路雷电"易击段"绝缘子串上并接线路避雷器来提高线路耐雷水平的方法。建立了雷电波作用下35 kV输电线路电磁暂态仿真计算模型,借助电磁暂态软件(ATP_EMTP)仿真分析了线路避雷器对35 kV输电线路耐雷水平的影响。计算结果表明,在"易击段"架设线路避雷器后,可明显提高35 kV输电线路的耐雷水平,尤其雷直击导线时,线路避雷器的作用效果更加明显;雷击杆塔塔顶时,杆塔接地电阻是影响35 kV输电线路耐雷水平的重要因素。最后,仿真估算了不同避雷器架设方案下35 kV输电线路的耐雷水平。本研究对于平原地区35 kV输电线路的线路防雷具有重要意义。
The joining of line attester in insulator string in 35 kV transmission lines sections which are easily stroked by thunder was researched. The electromagnetic transient simulation calculation model of 35 kV transmission lines under the action of lightning wave was built. The influence of the line attester on the lightning withstand level of 35 kV transmission lines was simulated and calculated by electromagnetic transient software ATP-EMTP. The results show that the joining of line attester can obviously improve the lightning withstand level of 35 kV transmission lines, and is especially effective when the lightning directly strikes the conductor. When the lightning strikes the tower top, it is the tower grounding resistance that greatly affects the lightning withstand level. The lightning withstand level of 35 kV transmission lines under various joining plans of line attester were simulated and calculated.
出处
《绝缘材料》
CAS
2008年第1期33-36,共4页
Insulating Materials
关键词
输电线路
杆塔接地电阻
线路型避雷器
耐雷水平
transmission lines
tower grounding resistance
line attester
lightning withstand level
