城市综合用地变电站接地设计研究

Study on Grounding Arrangement of Urban Substation at Integrative Land Utilized Area

城市供电需求量增加,而城市土地资源又极为紧缺,城市变电站接地接地问题日益突出。通过对城市综合用地变电站接地特点的讨论,以厦门110kV岳阳站为例,结合理论计算和实际工程,从降阻和安全性角度,分析了城市综合用地变电站可供利用的接地降阻措施及其应用效果。认为城市综合用地变电站可利用的降阻措施主要有做深井式接地极、利用自然接地体和使用性能优良的降阻剂;利用变电站周围的建筑物地网是的安全有效的降阻方法。

Due to rapid growth of urban power demand and lack of city land resource, the problem concerning urban substation grounding becomes sharp more and more. At discussion on grounding characteristics of urban substation at integrative land area, taken 110 kV Yueyang substation as exam- ple, the available grounding -resistance reducing measures and their effects for urban substation at in- tegrative land utilized area were analyzed from the view of resistance reducing and safety based on the- oretical calculation and practical engineering. It is considered that the available grounding-resistance reducing measures for urban substation at integral land utilized area are deep-well grounding electrode, utilization of natural grounding body and application of satisfactory resistance-reducing agent. Utiliza- tion of grounding grid of nearly building is an effective and safe resistance-reducing measure.