110kV变电站人工接地装置的设计研究

Research on Design of Artificial Earth-termination System at 110 kV Transformer Substation

结合某110 kV变电站接地装置工程的实践,对该站所处的环境情况、气象资料、土质和土壤状况等进行实地勘测,考虑接地电阻、接触电位差和跨步电位差应满足的要求,对该站接地装置进行设计。通过对比采取措施前后接地电阻的大小,选取结合深斜井的降阻设计方案,得到符合要求的电阻值,从而论证接地电阻改善方法的有效性和可行性。

Based on the practice of a earth-termination system project at a 110 kV transformer substation, field investigation on the environment condition, meteorological data, soil quality and soil condition in the said substation are conducted; the earth-termination system is designed considering the requirements for the earthing resistance, contact potential difference and step potential difference. Measures are taken to compare the earthing resistances before and after the improvement, and a resistance reduction design scheme characterized by deep-deviated wells combination is chosen to acquire corresponding resistances meeting the requirements, so as to demonstrate the effectiveness and feasibility of the earthing resistance improvement method.