基于ATP-EMTP的10kV配电网架空绝缘导线防雷技术研究  

Research on Lightning Protection Technology for Overhead Insulated Conductors in 10 kV Distribution Network Based on ATP-EMTP

作　　者：周文龙 刘登云 金兰 刘毅 ZHOU Wenlong;LIU Dengyun;JIN Lan;LIU Yi(Yongjia County Power Supply Company,State Grid Zhejiang Electric Power Co.,Ltd.,Wenzhou,Zhejiang 325100,China;Zhejiang Kechang Electronics Co.,Ltd.,Wenzhou,Zhejiang 325800,China)

机构地区：[1]国网浙江省电力有限公司永嘉县供电公司,浙江温州325100 [2]浙江科畅电子股份有限公司,浙江温州325800

出　　处：《自动化应用》2024年第7期220-222,共3页Automation Application

摘　　要：针对现有防雷技术雷击绝缘导线的感应过电压幅值过大、绝缘子雷击闪络率较高的问题,研究了一种基于ATP-EMTP的10 kV配电网架空绝缘导线防雷技术。首先,确定雷击点,计算架空绝缘导线的静电感应雷过电压最大幅值,并结合实际情况对过电压结果进行修正。其次,结合具体的防雷措施,建立ATP-EMTP杆塔等效模型,使用电压控制开关模拟绝缘子的闪络特性,并分析雷击的闪络特性。再次,计算雷电流作用下各节点的电压和直击雷作用下线路的雷击闪络率。最后,加入避雷线保护,使避雷线与导线发生耦合,计算导线过电压幅值,并在电压幅值变小时完成防雷保护。结果表明,当导线高度增加时,雷击绝缘导线的感应过电压幅值为420.12~460.10 kV;每个小组的绝缘子雷击闪络率均保持在30%以下,满足预期要求,线路耐雷水平显著提升。In response to the problems of excessive induced overvoltage amplitude and high insulator lightning flashover rate caused by lightning strikes on insulated conductors in existing lightning protection technologies,this paper studies a lightning protection technology for overhead insulated conductors in 10 kV distribution networks based on ATP-EMTP.Firstly,determine the lightning strike point,calculate the maximum amplitude of electrostatic induced lightning overvoltage on overhead insulated conductors,and correct the overvoltage results based on actual conditions.Secondly,based on specific lightning protection measures,establish an equivalent model of ATP-EMTP tower,simulate the flashover characteristics of insulators using voltage control switches,and analyze the flashover characteristics of lightning strikes.Again,calculate the voltage of each node under the action of lightning current and the lightning flashover rate of the line under direct lightning strike.Finally,add lightning protection to couple the lightning wire with the conductor,calculate the overvoltage amplitude of the conductor,and complete lightning protection when the voltage amplitude changes.The results show that as the height of the conductor increases,the induced overvoltage amplitude of the lightning struck insulated conductor is 420.12~460.10 kV;The lightning flashover rate of insulators in each group remains below 30%,meeting the expected requirements,and the lightning resistance level of the line has significantly improved.

关 键 词：ATP-EMTP 配电网 绝缘导线 防雷 

分 类 号：TM863[电气工程—高电压与绝缘技术]