高土壤电阻率变电站降阻措施分析及降阻目标选择

Analysis of Resistance Reduction Measures and Its Target Selection for Substation with High Soil Resistivity

采用接地系统辅助设计软件包CDEGS,结合工程实例对局部换土、深井接地、引外接地和敷设接地极(接地模块或离子接地棒)4种高土壤电阻率变电站常用降阻措施进行了仿真计算。基于计算结果分析了每种降阻措施的降阻特性,并提出了工程应用建议。此外,在确保人身和设备安全前提下,探讨了如何合理选择降阻目标避免过度设计。

Using CDEGS software package of grounding system and combined with engineering examples,four common resistance reduction measures for substation with high soil resistivity,including local soil replacement,deep well grounding,external grounding and laying grounding electrode(grounding module or ion grounding rod),are simulated and calculated.Based on the calculation results,the resistance reduction characteristics of each measure are analyzed,and the engineering application suggestions are put forward.In addition,on the premise of ensuring personal and equipment safety,how to reasonably select the target of resistance reduction to avoid over design is discussed.