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谭波,童雪芳,刘鸣亚,等. 异性导电媒质对直流接地极跨步电压分布的影响[J]. 科学技术与工程, 2021, 21(4): 1409-1414.
Tan Bo,et al.Research on Influence of Anisotropic Conducting Medium on Step Voltage Distribution of DC Grounding Electrode[J].Science Technology and Engineering,2021,21(4):1409-1414.
异性导电媒质对直流接地极跨步电压分布的影响
Research on Influence of Anisotropic Conducting Medium on Step Voltage Distribution of DC Grounding Electrode
投稿时间:2020-04-17  修订日期:2020-08-06
DOI:
中文关键词:  直流接地极  土壤模型  异性媒质  跨步电压
英文关键词:HVDC earth electrode  soil model  heterosexual medium  step voltage
基金项目:国家电网公司2019年科技指南项目(5200-201955056A-0-0-00)“海洋直流接地极技术研究”
              
作者单位
谭波 中国电力科学研究院有限公司武汉分院
童雪芳 中国电力科学研究院有限公司武汉分院
刘鸣亚 三峡大学电气与新能源学院
董晓辉 中国电力科学研究院有限公司武汉分院
王湘汉 中国电力科学研究院有限公司武汉分院
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中文摘要:
      为了研究异性导电媒质对直流接地极跨步电压分布的影响,通过CDEGS建立了水平双圆环直流接地极模型,计算了极址外部附近以及极址区域内存在异性导电媒质时的跨步电压分布,结果表明:当接地极极址外部附近存在一块高(低)电阻率的异性媒质时,将会使外环靠近异性媒质区域的溢流密度及跨步电压下降(升高);当极址内部的表层局部区域存在一块高(低)电阻率的异性媒质时,将会使位于异性导电媒质的环段的溢流密度下降(升高),但跨步电压却反而增加(降低);当极址内部的下层局部区域存在一块高(低)电阻率的异性媒质时,将会使位于异性导电媒质的环段的溢流密度和跨步电压同时降低(升高)。研究成果可为直流输电工程中接地极设计及选址提供参考。
英文摘要:
      In order to study the influence of anisotropic conductive medium on the step voltage distribution of DC grounding electrode, a horizontal double ring DC grounding electrode model is established by CDEGS, and the step voltage distribution is calculated when there is a anisotropic conductive medium near and outside the electrode site. The results show that when there is a high (low) resistivity anisotropic medium near the outside of the grounding electrode site, the step voltage distribution will be The overflow density and step voltage of the ring near the anisotropic medium decrease (increase); when there is a piece of anisotropic medium with high (low) resistivity in the local area of the surface layer inside the polar site, the overflow density of the ring section located in the anisotropic conductive medium will decrease (increase), but the step voltage will increase (decrease); When there is a high (low) resistivity anisotropic medium in the lower part of the polar site, the overflow density and step voltage of the ring segment located in the anisotropic conductive medium will decrease (increase) at the same time. The research results can provide a reference for the design and site selection of grounding electrodes in HVDC projects.
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