高压直流接地极多场分布特性及影响规律研究  

Study on Multi-field Distribution Characteristics and Influence Law of High-voltage Direct Current Grounding Electrode

作　　者：任振宇 贾曜诚 REN Zhenyu;JIA Yaocheng(Northeast Electric Power University,Jilin 132012,China)

机构地区：[1]东北电力大学,吉林吉林132012

出　　处：《吉林电力》2023年第1期31-34,共4页Jilin Electric Power

摘　　要：针对直流接地系统所承受的工作电流过高对接地极的安全运行、人畜安全和地下金属管道设施安全运行构成严重威胁问题,基于等效镜像法与有限元法叠加的方法对复合分层土壤中埋设的环形接地电极周围实际电位进行求解。推导了接地极电流场与温度场之间的交互作用影响;分析了接地极埋深对于地面电位分布及接地特性的影响。结果表明,接地极埋地深度与周围电位和接地电阻阻值成反比,与接地极温升成正比。The high working current of direct current grounding system poses a serious threat to the safe operation of grounding electrode,human and animal safety and underground metal pipeline facilities.In this paper,the actual potential around the annular grounding electrode buried in the composite layered soil is solved based on the superposition method of equivalent mirror method and finite element method.The interaction effect between the current field and the temperature field of the grounding electrode is deduced,the influence of grounding electrode depth on ground potential distribution and grounding characteristics is analyzed.The results show that the buried depth of grounding electrode is inversely proportional to the surrounding potential and grounding resistance,and is proportional to the temperature of grounding electrode.

关 键 词：高压直流输电 直流接地极 地表电位 电流场 温度场 

分 类 号：TM721.1[电气工程—电力系统及自动化]