石化企业电网雷击分析及对策

Analysis & Countermeasures of Electric Nets Thunder Struck in Petrochemical Enterprises

燕山石化电网35kV、110kV、220kV全部采用架空线路,构成电力线路主干网,大部分线路处于丘陵地区。近几年来雷电活动十分频繁,特别是35kV、110kV架空线路每年多次遭受雷击,造成线路跳闸,直接影响炼化装置生产。对2000～2003年来雷击事故进行了统计分析,在传统避雷线、杆塔接地装置防雷设施基础上,采用ATP(Alternative Transients Program)软件对安装线路氧化锌避雷器进行仿真计算,依据仿真结果,确定了在架空线路易击段、易击杆塔、特殊地形地貌杆塔安装线路型氧化锌避雷器方案,并从2004年7月至2005年5月在35kV、110kV架空线路上安装了线路型氧化锌避雷器。实践证明,有效加强了线路防反击雷和绕击雷能力,使电网耐雷水平得到了提高。

Aerial cable are widely used in Beijing Yanshan Petrochemical Co. ,include 35kV, 110kV and 220kV,forming the main power grid.Because of locating at the hilly land,the power grid is often destroyed by lightning,especially on the 35kV and 110kV.In recent years,several accidents have already happened.The accidents statistics from 2000 to 2003 are analyzed in this paper.Based on the tradition lightning conductor, ATP （Alternative Transients Program）software is used to stimulate the operation of zinc oxide surge arresters, and good effect is taken according to the data of the stimulation.Our plan is to install zinc oxide surge arresters on the power grid and the pole where there are easily destroyed by the lightning.The work from July 2004 to May 2005 is finished.All the facts proves that the capacity of defense the react lightning and the twist lightning destroy is strengthened.