高土壤电阻率下的新型石墨接地材料冲击特性仿真分析
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摘要
为了研究新型石墨接地材料在高土壤电阻率地区的冲击特性,研究运用CDEGS软件对新型石墨接地材料在高土壤电阻率环境下的电感效应进行分析。从不同尺寸、不同土壤电阻率两个方面与传统接地钢材料进行对比,得到如下结论:在较低土壤电阻率土壤中,冲击接地阻抗受接地体长度的影响很大;在相同尺寸情况下,新型石墨接地材料在高频电流下的电感效应比钢材料小,冲击接地阻抗也小于钢材料,尤其在高土壤电阻率土壤中,新型石墨接地材料在电感效应方面明显优于传统接地钢材料。
In order to study the impact characteristics of new graphite grounding materials in high soil resistivity areas,this research uses CDEGS software to analyze the inductance effect of new graphite grounding materials in high soil resistivity environment,from two aspects of different sizes and different soil resistivities.Comparison to traditional grounded steel materials,the following conclusions are obtained:In lower soil resistivity soils,the impact grounding impedance is greatly affected by the length of the grounding body;Under the same size,the new graphite grounding material has a smaller inductance effect at high frequency current than steel material,and the impact grounding impedance is also smaller than steel material,especially in high soil resistivity soil,It is significantly superior to traditional grounded steel materials in terms of inductance.
In order to study the impact characteristics of new graphite grounding materials in high soil resistivity areas,this research uses CDEGS software to analyze the inductance effect of new graphite grounding materials in high soil resistivity environment,from two aspects of different sizes and different soil resistivities.Comparison to traditional grounded steel materials,the following conclusions are obtained:In lower soil resistivity soils,the impact grounding impedance is greatly affected by the length of the grounding body;Under the same size,the new graphite grounding material has a smaller inductance effect at high frequency current than steel material,and the impact grounding impedance is also smaller than steel material,especially in high soil resistivity soil,It is significantly superior to traditional grounded steel materials in terms of inductance.
引文
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[3]郭在华,邢天放,吴广宁,等.冰冻土壤中垂直接地极的接地电阻变化规律[J].高电压技术,2014,40(03):698-706.GUO Zai-hua,XING Tian-fang,WU Guang-ning,et al.Grounding Resistance Change Rule of Vertical Grounding Electrode in Frozen Soil[J].High Voltage Engineering,2014,40(03):698-706.
[4]陈伟,孙勇,项鹏飞,等.基于深井爆破接地技术的换流站接地网降阻技术研究[J].陕西电力,2017,45(05):88-92.CHEN Wei,SUN Yong,XIANG Peng-fei,et al.Study on Ground Resistance Reduction Test for Converter Station Based on Deep Well Blasting[J].Shaanxi Electric Power,2017,45(05):88-92.
[5]毛宗科,杨建立,田亚龙.戈壁沙漠地区油库接地装置的设置与管理[J].石油库与加油站,2005,14(03):32-34+47.MAO Zong-ke,YANG Jian-li,TIAN Ya-long.View on How to Equip and Manage Grounding Facilities in Desert Areas[J].Oil Depot and Gas Station,2005,14(03):32-34+47.
[6]王颢.青藏铁路格拉段防雷接地技术的研究[D].成都:西南交通大学,2007.WANG Hao.Research on Lightning Protection and Grounding System in Qinghai-Tibet Railway GE-LA Segment[D].Chengdu:Southwest Jiaotong University,2007.
[7]李超.山岩地区利用杆塔基础降低杆塔接地电阻的方法研究[D].长沙:长沙理工大学,2008.LI Chao.Research on Reducing Tower Ground Resistance of Yamaiwa Region by Using Tower Foundation[D].Changsha:Changsha University of Science and Technology,2008.
[8]林雪梅.可膨胀石墨的化学氧化法制备研究进展[J].炭素,2005(04):44-48.LIN Xue-mei.Development of Producing Expandable Graphite Via Chemical Oxidization Method[J].Carbon,2005(04):44-48.
[9]顾安妍.膨胀石墨的制备及其导电性能的研究[D].重庆:重庆大学,2010.GU An-yan.Preparation of Exfoliated Graphite and Study the Conductive Capability of the Product[D].Chongqing:Chongqing University,2010.
[10]张岩,刘福贵,汪友华,等.改进的双指数函数雷电流波形及其辐射电磁场的计算[J].电工技术学报,2013,28(S2):133-139.ZHANG Yan,LIU Fu-gui,WANG You-hua,et al.A Modify Double Exponential Base-current and Its Application in E-valuating the Lightning EM Fields[J].Transactions of China Electrotechnical Society,2013,28(S2):133-139.
[11]赵志斌,崔翔,张波,等.应用矩量法计算变电站内的空间电磁场[J].中国电机工程学报,2004,24(11):148-153.ZHAO Zhi-bin,CUI Xiang,ZHANG Bo,et al.The Electromagnetic Field Calculation in Substation by the Method of Moment[J].Proceedings of the CSEE,2004,24(11):148-153.