忻州500 kV变电站接地网设计研究

忻州500 kV变电站地质条件较差,整个变电站位于河卵石、花岗片麻岩上,土壤电阻率高,对于这种地质条件的接地系统设计,在山西省大型超高压变电站中尚属首次,合理设计接地系统,对采用深井接地极降低接地装置的接地电阻、接触电位差和跨步电位差进行了分析研究。

Research on Earth Screen Design of Xinzhou 500 kV Substation

Xinzhou 500 kV substation is built on the ground with the shingle and gneissic granite.The geological condition is worse,and the soil resistance is high.It is the first time to do the ground system design of the super-high voltage substation under such geological condition in Shanxi province.In order to make the design more reasonable,this paper discusses and(analyses) the method of burying earth poles in the deep well to reduce the ground resistance,touch potential difference and step potential difference.