中国电力2018，Vol.51Issue(3)：42-48,7.DOI:10.11930/j.issn.1004-9649.201612032
110kV全户内智能变电站接地网优化设计
Optimal Design of Grounding Grid for 110 kV Whole-Indoor Intelligent Substation
摘要
Abstract
Because of the small area and high level of ground fault current in today's whole-indoor urban intelligent substation,it is difficult to decrease the grounding resistance and the grounding potential rise,even with the low soil resistivity.Based on a soil model of a 110kV whole-indoor substation,the optimal grounding grid of a whole-indoor intelligent substation 110-A2-X1 is designed.In the process of optimal design,the threshold for grounding potential rise was relaxed appropriately by analyzing the requirements for grounding parameters in design code.The resistance reduction effects of two-layer grounding grid and deep-well grounding electrodes of different numbers and length were investigated with CDEGS software,and the safety and economy of the two resistance reduction measures were compared.The results show that the grounding deep-well has high cost but good resistance reduction effects compared with the two-layer grounding grid.And for unattended 110kV whole-indoor intelligent substation,it is suggested to use six grounding wells each with a depth of 55m for grounding grid o reduce the resistance.关键词
全户内智能变电站/双层接地网/接地参数/接地深井/优化设计Key words
whole-indoor intelligent substation/two-layer grounding grid/grounding parameters/grounding deep-well/optimal design分类
信息技术与安全科学引用本文复制引用
王平,贾立莉,李守学,李抗,律方成..110kV全户内智能变电站接地网优化设计[J].中国电力,2018,51(3):42-48,7.基金项目
中央高校基本科研业务费专项资金资助(2017MS101).This work is supported by the Fundamental Research Funds for the Central Universities (No.2017MS101). （2017MS101）
