10 kV变电所接地做法简析

徐　华（清华大学建筑设计研究院有限公司，北京市 100084）

Brief Analysis of Earthing Methods for 10 kV Substation

XU Hua（Architectural Design & Research Institute of Tsinghua University Co.,Ltd.,Beijing 100084，China）

Abstract：This article discusses the design requirements for functional earthing and protective earthing in substations,analyzes the problems with the commonly used earthing schemes in the power supply department and the national standard design drawings 14D504 Grounding Device Installation. It also proposes various forms of“one‑point earthing”schemes for multiple power sources and diesel generator rooms,and conducts a reliability analysis of the earthing resistance value of substations.

Key words：substation;functional earthing;protective earthing;one‑point earthing;no earthing system;small resistance earthing system;common earthing;uncommon earthing

摘　要：论述变电所功能接地和保护接地的设计要求，分析供电部门常用的接地方案和国家标准设计图集14D504《接地装置安装》存在的问题，提出多电源及柴油发电机房多种形式的“一点接地”方案，并对变电所接地电阻值进行可靠性分析。

关键词：变电所；功能接地；保护接地；一点接地；不接地系统；小电阻接地系统；共用接地；不共用接地

中图分类号：TU852                　  文献标识码：A

doi：10.3969 / j. issn.1003 － 8493.2023.04.002