1000kV变电站雷电过电压的研究  

Research of Lightning Over-voltage on the 1000 kV Substation

作　　者：胡强[1] 曾嶒[1] 

机构地区：[1]华东交通大学,南昌335100

出　　处：《能源研究与管理》2016年第2期38-41,73,共5页Energy Research and Management

基　　金：国家自然科学基金项目(51167005);江西省教育厅科技项目(GJJ12288);江西省教育厅科技研究项目(GJJ14386);江西省科技支撑计划项目(20142BBE50001)

摘　　要：将1000kV变电站与进线段结合起来,考虑雷击点与变电站距离,雷击处雷电流不同的幅值,杆塔冲击接地电阻等不同的影响因素,采用EMTP-ATP对1 000 k V雷电侵入波过电压进行了仿真研究。研究表明,雷击点的不同,雷击处不同的雷电流幅值,杆塔冲击接地电阻的不同都会给变电站内各设备雷电过电压产生较大的影响。验证了避雷器的保护效果,在变电站各设备前加装避雷器能有效的限制雷电过电压,并且在此前提下,在母线上加装1组避雷器,可更加有效的降低雷电过电压。最后提出在避雷器与变压器之前串联电感,以抑制雷电侵入波的陡度,并从工程经济的角度对加装的串联电感值分析,同时兼顾经济性与实用性,可为工程提供一定的参考。Combine the line and the 1 000 k V substation, considering the influence of different factors of the distance between the lightning strike point and the substation, the different amplitude of lightning current on the lightning strike point, tower grounding resistance, EMTP-ATP is used to conduct the simulation research about the 1 000 k V lightning invasion wave over-voltage. The research has shown that the different lightning point, the different amplitude of lightning current and the different tower grounding resistance will produce great influence on over-voltage amplitude on each equipment in the transformer substation. It is proved that lightning arrester is useful, under the premise of installing lightning arrester before the equipment, it is more effectively to reduce the lightning over-voltage while the bus with a group of arrester. Finally, it puts forward that installing a inductor before the arrest and the equipment to suppress lightning invasion wave steepness. To analyze value of the inductor from the angle of engineering economy that can provide certain reference for engineering.

关 键 词：1000KV变电站 雷电流幅值 避雷器 ATP-EMTP 杆塔冲击接地电阻 

分 类 号：TH326[机械工程—机械制造及自动化]