摘要
采用ATP-EMTP仿真软件建立有无避雷线输电线路的仿真模型,并考虑接地电阻、档距大小,进行仿真比较。结果表明:杆塔塔顶电压与接地电阻成正比,并呈线性增加,随着电阻值增加,杆塔塔顶电压增加越来越快;当杆塔水平档距小于100 m时,直击杆塔塔顶电压随档距的增加呈线性增长,当档距大于100 m时,杆塔塔顶电压的变化就不明显了;验证35 k V线路全线架设避雷线可有效降低输电线路杆塔塔顶电压幅值,提出石化企业35 k V输电线路应全线架设避雷线。
This paper establishes the stimulation model electric transmission line with the lightening conductor line with ATP- EMTP,the stimulation software and makes stimulation comparison in accordance with the span and ground resistance. The simulation results show that the tower top voltage is proportional to the grounding resistance,and increases linearly;as the resistance value increases,the tower top voltage increases more quickly; when the tower＇s horizontal span is less than 100 m,the watchtower＇s top voltage increases linearly with the increase of span;when the span is longer than 100 m,the change of the tower top voltage is not quite obvious. The results also prove that the 35 kV line with the lightening conductor line in the whole line can effectively reduce the voltage amplitude of electric transmission line tower＇s top voltage. It is proposed in this article that35 kV electric transmission lines of petrochemical enterprises should be aerial with lightning conductor line in the whole line.
出处
《安全、健康和环境》
2015年第3期11-14,共4页
Safety Health & Environment
关键词
输电线路
ATP-EMTP
避雷线
接地电阻
档距
35 kV electric transmission line
ATP-EMTP
ground wire grounding resistance
span
