考虑流层间粘力的直流接地极线路招弧角间电弧运动模型研究  

Research on Arc Movement Model Between Arcing Angles of DC Grounding Pole Lines Considering Interlaminar Viscous Force

作　　者：王涛 郑连清[1] 范松海 官瑞杨 李昂 WANG Tao;ZHENG Lianqing;FAN Songhai;GUAN Ruiyang;LI Ang(State Key Laboratory of Power Transmission Equipment&System Security and New Technology,Chongqing University,Chongqing 400044,China;State Grid Sichuan Electric Power Research Institute,Chengdu 610041,China;State Key Lab of Control and Simulation of Power Systems and Generation Equipments Department of Electrical Engineering,Tsinghua University,Beijing 100084,China;Maintenance Company,State Grid Henan Electric Power Company,Zhengzhou 450004,China)

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044 [2]国网四川省电力公司电力科学研究院,成都610041 [3]清华大学电机系,电力系统及发电设备控制和仿真国家重点实验室,北京100084 [4]国网河南省电力公司检修公司,郑州450004

出　　处：《高压电器》2021年第6期24-31,40,共9页High Voltage Apparatus

基　　金：国家自然科学基金(51577020)。

摘　　要：直流接地极线路耐雷水平低,在遭受雷击和操作过电压时容易在绝缘子串上建立电弧,一般采取在绝缘子两端安装招弧角的方法来防止直流电弧烧蚀绝缘子。目前缺少招弧角的熄弧机理及电弧运动过程的研究,招弧角的安装均依据运行经验,缺少理论依据。文中采用链式电弧模型,考虑电流元间粘力的作用,建立了招弧角间直流电弧运动模型,提出了一种基于大矩阵存放电流元位置坐标的算法,在MATLAB中编制程序,仿真分析电弧运动过程及电弧受力,得出磁场力和热浮力为熄弧的主要动力的结论,为招弧角的安装提供理论依据。最后在小尺度直流电弧实验平台进行熄弧实验,验证了文中所建模型的有效性。The lightning resistance level of DC grounding pole line is low.It is easy to build arc on insulator string when it is struck by lightning and operated overvoltage.Generally,arc angle is installed at both ends of insulator to prevent DC arc from ablating insulator.At present,there is a lack of research on arc extinguishing mechanism and arc motion process of arc initiation angle.Installation of arc initiation angle is based on operation experience and lack of theoretical basis.In this paper,a chain arc model is adopted,considering the effect of current element viscous force,and a DC arc motion model between arc-initiating angles is established.An algorithm based on a large matrix to store the position coordinates of current element is proposed.A program is programmed in MATLAB to simulate and analyze the arc motion process and arc force.It is concluded that the magnetic field force and thermal buoyancy force are arc extinguishing.The conclusion of the main power supply a theoretical basis for the installation of arc angle.Finally,arc extinguishing experiments are carried out on a small-scale DC arc experimental platform to verify the validity of the proposed model.

关 键 词：接地极线路 招弧角 粘力 直流电弧 运动模型 

分 类 号：TM862[电气工程—高电压与绝缘技术] TM501.2