500 kV变电站雷电过电压仿真计算与防雷校核  

Lightning Overvoltage Calculation Simulation and Protection Check of 500 kV Substation

作　　者：苗丽芳 曹斌[1] 王琪[1] 刘宇 苏珂 辛东昊[1] 郭凯 MIAO Lifang;CAO Bin;WANG Qi;LIU Yu;SU Ke;XIN Donghao;GUO Kai(Inner Mongolia Power Research Institute,Hohhot 010020,China)

机构地区：[1]内蒙古电力科学研究院,呼和浩特010020

出　　处：《内蒙古电力技术》2020年第4期53-56,72,共5页Inner Mongolia Electric Power

基　　金：内蒙古电力(集团)有限责任公司科技项目“500 kV输变电工程雷电侵入波过电压计算与防护研究”(2018-01)。

摘　　要：以内蒙古电网500 kV丰泉变电站为研究对象,基于EMTP/ATP仿真平台,建立雷电过电压电磁暂态计算模型,据此计算雷电在变电站内设备上产生的最大侵入波过电压,校核变电站设备的雷电冲击绝缘水平,结果表明,典型运行方式下,丰泉变电站变压器、断路器、隔离开关、CVT、高抗上的最大雷电过电压均小于内绝缘保证强度和外绝缘保证强度。在丰泉变电站变压器端和每回线路入口处安装避雷器、母线上不安装避雷器的防雷保护布置方案,可满足变电站的防雷保护要求。经计算,丰泉变电站站内设备的雷电安全运行年为1455 a,满足标准要求。Electromagnetic transient calculation model of 500 kV typical Fengquan station in Inner Mongolia grid is established for lightning intruding overvoltage calculation based on EMTP/ATP software.The maximum overvoltage on electrical equipment in station caused by lightning intruding surge is calculated.The insulation level of the lightning impulse of electrical equipment in station is checked.It is proved that under the typical operation mode,the maximum lightning overvoltage of transformer,circuit breaker,isolation switch,CVT and high resistance of Fengquan station is less than that of internal insulation guarantee strength and external insulation guarantee strength.The lightning protection layout scheme in Fengquan station of lightning arrester installed at the transformer end and the entrance of each circuit,and no lightning arrester installed on the bus,can meet the lightning protection requirements of the substation.After calculation,the lightning safety operating time of the equipment in Fengquan station is 1455 years,which meets the standard requirements.

关 键 词：500 kV变电站 雷电侵入波过电压 电磁暂态计算 雷电安全运行年 雷电冲击绝缘水平 防雷保护 

分 类 号：TM64[电气工程—电力系统及自动化]