特殊地质条件下换流站工程接地技术问题研究  

Study on Grounding Technology of Convertor Station Project under Special Geological Conditions

作　　者：丁永福[1] 袁清云[1] 寻凯[1] 张诚[1] 文习山[2] 

机构地区：[1]国家电网公司直流建设分公司,北京 [2]武汉大学电气工程学院,湖北武汉

出　　处：《电气工程》2017年第1期105-114,共10页Journal of Electrical Engineering

摘　　要：考虑到±800 kV灵州换流站工程所处地点的特殊性,即全岩石地质条件以及微风化特殊地质条件,首次在此类地质条件的接地研究中采用边界元算法进行建模分析。本文针对全岩石地质条件以及微风化特殊地质条件,并未采用传统的增设垂直接地体的措施,而采用了增设均压带以降低网内的跨步电位差、接触电位差和在超标处铺设高阻层的措施,通过增加与人体电阻率串联的地表电阻而减少通过人体的电流,从而允许更高的接触电压和跨步电压。Considering the particularity of Lingzhou ±800 kV converter station project location, namely, the whole rock geological conditions and the slightly weathered special geological conditions, it is the first time that the boundary element method is used for modeling and analysis in the such of geological conditions grounding research. Based on the whole rock geological conditions and the slightly weathered special geological conditions, the traditional measures that add vertical grounding body fail to be used, the average voltage zone is adopted to reduce the step potential difference and contact potential difference within the network and the high resistance layer is paved in the exceed standard place;the current through the human body is reduced by increasing the surface resistivity series connect the human body, thereby allowing the higher touch voltage and step voltage.

关 键 词：特殊地质 换流站 接地 边界元算法 跨步电位差 接触电位 

分 类 号：TM8[电气工程—高电压与绝缘技术]