垂直接地极对接地系统电气性能的影响

Influence of Vertical Earth on Electricity Performance of Grounding System

采用数值计算方法,分析了垂直接地极对接地系统的接地电阻、接触电压及跨步电压的影响。分析表明,增设垂直接地极能有效减低接地系统的接地电阻、减小发变电站的接触电压和跨步电压、减小季节因素对地网安全性的影响。但在有限的地网面积范围内布置过多的垂直接地极时,垂直接地极的效果将趋于饱和。

This paper analyzes the influences of vertical earth on grounding resistance, contact voltage and step voltage of grounding system. Analysis result shows that application of vertical grounding can effectively reduce grounding resistance, contact voltage and step voltage of power plant, and minish ground network safety negative influences caused by seasonal factors.