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抗雷电过压影响的电容式接地网设计
引用本文:刘林毓,扈海泽,方梦鸽,彭丽,王方.抗雷电过压影响的电容式接地网设计[J].吉首大学学报(自然科学版),2017,38(5):24-28.
作者姓名:刘林毓  扈海泽  方梦鸽  彭丽  王方
作者单位:(1.国网醴陵市供电公司,湖南 醴陵 412200;2.吉首大学信息科学与工程学院,湖南 吉首 416000;3.长沙理工大学电气与信息工程学院,湖南 长沙 410000)
基金项目:湖南省大学生研究性学习和创新性实验计划项目(2016405);校级自然科学类科研项目(Jd17007;JDX17030)
摘    要:接地网一直是电力建设中不可缺少的一部分,同时也是现代防雷及接地研究的重点.接地网的均压效果直接关系到接触电压和跨步电压对人身及设备安全的影响.利用电容的充放电特性,提出了在接地网上连接电容器以构建电容式接地网的设计方案.通过ATP-EMTP电磁仿真软件建立仿真电路模型,并在不同的电容值下测量接地网地电位的幅值及电位陡度.实验结果表明电容式接地网对地电位幅值陡度的降低具有很好的效果,该方法在降低雷击对地表以上电气设备的损坏,以及提高工作人员的安全系数方面具有一定的参考价值.

关 键 词:接地网  充放电  电容式接地网  ATP-EMTP  幅值陡度

Design of Capacitive Ground Grid for Over-Voltage of Lightning
LIU Linyu,HU Haize,FANG Mengge,PENG Li,WANG Fang.Design of Capacitive Ground Grid for Over-Voltage of Lightning[J].Journal of Jishou University(Natural Science Edition),2017,38(5):24-28.
Authors:LIU Linyu  HU Haize  FANG Mengge  PENG Li  WANG Fang
Institution:(1.Liling Power Supply Company,SGCC,Liling 412200,Hunan China;2.College of Information Science and Engineering, Jishou University,Jishou 416000,Hunan China;3.College of Electrical and Information Engineering,Changsha University of Science and Technology,Changsha 410000,China)
Abstract:Ground grid construction has been an indispensable part of electric power construction and also a research focus in lightning protection and grounding.Voltage sharing of ground grid is directly related to the influence of contact voltage and step voltages on human and device safety.According to the charging and discharging characteristics of capacitance,this paper proposes a design scheme to construct capacitive ground grid connected with capacitor.ATP-EMTP electromagnetic software is used to simulate a circuit model,and the amplitude and steepness of ground potential are measured with different capacitance values.The results show that the capacitive ground grid is effective in reducing the amplitude and steepness of ground potential.This scheme can reduce the damages of lightning on above-ground electrical devices and increase human safety.
Keywords:ground grid                                                                                                                        charge and discharge                                                                                                                        capacitive ground grid                                                                                                                        ATP-EMTP                                                                                                                        steepness of amplitude
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