地下金属管道对变电站接地网接地电阻及其测量的影响  

Influence of Underground Metal Pipeline on Grounding Resistance of Substation Grounding Grid and Its Measurement

作　　者：李哲 LI Zhe(Shanxi Provincial Gas Planning,Design and Research Institute Co.,Ltd.,Taiyuan,Shanxi 030024,China)

机构地区：[1]山西省燃气规划设计研究院有限责任公司,山西太原030024

出　　处：《自动化应用》2023年第10期71-73,共3页Automation Application

摘　　要：变电站接地网的接地电阻是否满足规范要求直接关系电网的安全运行,而接地电阻的大小是检验接地系统是否满足规范要求的关键。目前,我国接地网在运行过程中存在大量的安全隐患,计算和分析接地网的接地电阻,导致接地网的设计与实际运行存在很大矛盾。另外,随着电网规模和短路电流的增大,以及各种微型计算机监测装置的广泛使用,接地系统的设计变得更加困难,这种情况在高电阻率地区更为严重,应采取多种措施来减小电阻。Meeting the specification requirements of the substation grounding grid′s grounding resistance is crucial for its safe operation,and the size of the grounding resistance determines if it meets those criteria.In China,several operational risks exist due to issues with calculating and analyzing the grounding resistance.The design of the grounding grid and actual operation show considerable differences.Additionally,the design of the grounding system becomes more challenging with an increase in power grid size,short-circuit current,and microcomputer monitoring devices.Such challenges become more complicated in high resistivity areas,and various measures should be implemented to decrease the resistance.

关 键 词：变电站 接地网 接地电阻 测量 

分 类 号：TM86[电气工程—高电压与绝缘技术]