高速铁路牵引变电所接地技术研究  

Research on grounding technology of high-speed railway traction substation

作　　者：陈凡华 臧舜日 CHEN Fanhua;ZANG Shunri(CRRC Qingdao Sifang Rolling Stock Research Institute Co.,Ltd.,Qingdao 266000,Shandong,China)

机构地区：[1]中车青岛四方车辆研究所有限公司,山东青岛266000

出　　处：《工程建设》2021年第11期32-37,共6页Engineering Construction

摘　　要：针对高速铁路牵引变电所占地面积小,所处位置地质环境差,接地电阻、跨步电压等接地技术参数难以达到要求等问题,采用高密电法对测量土壤电阻率,提升接地装置定点布置的准确性,通过CDEGS接地设计软件进行接地系统的数值仿真设计,优化接地网结构进行研究,系统分析了影响接地系统的技术因素。结果表明:在接地材料类型选择方面,铜覆钢接地材料的投资强度最低,缓释型离子接地装置降租效率高,后者可以避免大面积地网的敷设。高密电法、异频大电流法测量土壤电阻率,地勘准确性高,采用CEEGS接地软件仿真设计,有利于提升接地系统电气参数的可靠性。同等用量水平射线敷设时,外延的数量越多,降阻效率越小,但地电位降低更为明显,接地系统更安全。Aiming at the problems of small area of high-speed railway traction substation,poor geological environment of the location,and difficulty to meet the requirements of grounding technical parameters such as grounding resistance,step voltage,etc.,high-density electrical method is used to measure soil resistivity,and to improve the accuracy of grounding device fixed-point arrangement.Through the CDEGS grounding design software,the grounding system is designed by numerical simulation,the grounding grid structure is optimized for research,and the technical factors affecting the grounding system are systematically analyzed.The results show that,in terms of selection of grounding material type,copper-clad steel grounding material has the lowest investment intensity,slow-release ion grounding device has high resistance reduction efficiency,and the latter can avoid the laying of large area ground network.The accuracy of geological survey is high by using high-density electrical method and different-frequency high-current method for measuring soil resistivity.The simulation design by using CEEGS grounding software is helpful to improve the reliability of the electrical parameters of the grounding system.As for the same amount of horizontal ray laying,the more the number of epitaxy is,the smaller the resistance reduction efficiency will be,but the lower ground potential is more obvious,the grounding system is safer.

关 键 词：牵引变电所 接地系统 高密电法 CDEGS 跨步电压 

分 类 号：TM862[电气工程—高电压与绝缘技术]