摘要
为提升GIS升压站雷电侵入波过电压防护水平,基于电磁暂态计算软件建立雷电侵入波过电压仿真计算模型,分析不同因素对雷电侵入波过电压影响的规律及特点,计算确定不同运行方式下的过电压水平,进而提出雷电侵入波过电压防护措施。结果显示:杆塔接地电阻对各设备过电压水平的影响不尽相同,杆塔冲击接地电阻并不是越低越好,在一定的范围之内存在对侵入波防护有利的最佳值;由于站外进线段各基杆塔塔型不同,落雷点到变电站的距离越大,站内设备上的过电压水平不一定越小;优化避雷器布置方式,在并联电抗器处设置一组避雷器后,各设备上的雷电侵入波过电压水平显著降低;加装线路避雷器能够显著降低站内各设备上的侵入波过电压水平。
For improving the protection level of the lightning intruding wave overvoltage of GIS step-up station,the simulation calculation model of lightning intrusion wave overvoltage is set up based on ATP-EMTP.The law and characteristic on the influence of different factors on the lightning intruding wave overvoltage are analyzed.The overvoltage level in different operating modes is calculated,and then the protection measures of the lightning intrusion wave overvoltage are proposed.The results show that the influence of grounding resistance of the tower on the overvoltage level of each equipment is different.The impact grounding resistance of the tower is not the lower the better and,to a certain extent,has an optimum value for the protection of the intruding wave.As the type of each base tower of the incoming section outside the station is different,the larger the distance from lightning drop point to the substation,the overvoltage level on the equipment in the station is not necessarily smaller.After the layout optimization of lightning arrester and installation of one set of lightning arrester at the parallel reactor,the lightning intruding wave overvoltage level on each device is significantly reduced.The installation of line arrester can significantly reduce the level of intrusion overvoltage on each device in the station.
作者
田金虎
刘渝根
赵俊光
TIAN Jinhu;LIU Yugen;ZHAO Junguang(Maintenance Branch Company,State Grid Chongqing Electric Power Corporation,Chongqing 400030,China;State Key Laboratory of Power Transmission Equipment&System Security and New Technology,Chongqing University,Chongqing 400030,China;Shibei Power Supply Branch Company,State Grid Chongqing Electric Power Corporation,Chongqing 401147,China)
出处
《高压电器》
CAS
CSCD
北大核心
2021年第12期74-82,共9页
High Voltage Apparatus
