特高压试验基地接地网设计的安全性评价与分析

Evaluation and Analysis of the Security of the Design of the Grounding Grid in the EHV Testing Base

特高压试验研究/检修基地包含的电力设备多,对接地网设计的要求高。通过建立地网的导体模型和土壤模型,计算了基地地网接地阻抗以及电位分布,计算了现有模型下的接触电势和跨步电势等参数,来验证设计方案是否满足预期的接地电阻、跨步电压、接触电压的要求,并给出了建议。

There are a lot of power equipment in an EHV testing research/overhaul base, so the design of the groundinggrid is demanding. Based on the establishment of the conductor and soil models for the grounding grid, parameterslike grounding impedance, potential distribution, contact and step potentials have been calculated to verifywhether the designing scheme can meet the expectant requirements of grounding resistance, step and contact voltages.In addition, this paper gives relevant suggestions.