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首页> 外文期刊>Quarterly Journal of Engineering Geology and Hydrogeology >A GIS for the planning of electrical earthing
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A GIS for the planning of electrical earthing

机译：用于电气接地规划的GIS

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摘要

When creating an electrical earth for a transformer with vertically driven earthing rods, problems can arise either because the ground is too hard or because the ground is too resistive to achieve the required earthing resistance. To assist in the planning of earthing installations a geographic information system (GIS) layer has been created. In its simplest form it consists of a colour coded map that indicates the most likely earthing installation: a single vertically driven rod (indicated by dark green); multiple vertically driven rods (indicated by light green); a horizontal trench, where a rod installation is unlikely (indicated by yellow); for difficult ground, a specialist installation (i.e. drilling; indicated by red). However, the GIS can be interrogated to provide site-specific information such as site conditions, likely depth of installation and quantity of earthing materials required. The GIS was created from a spatial model constructed from soil, superficial and bedrock geology that has been attributed with engineering strength and resistivity values. Calculations of expected earthing rod resistance, rod or trench length, and all possible combinations of ground conditions have been compared with the 'likely' conditions required for each of the four proposed installation scenarios to generate the GIS layer. The analysis has been applied to the electrical network distribution regions of Western Power Distribution, in the English Midlands, and UK Power Networks, which covers East Anglia, London and the SE of England. Because the spatial model that underlies the GIS has been constructed from national databases the analyses can be extended to other regions of the UK.
机译：当为带有垂直驱动的接地棒的变压器创建电气接地时，可能会出现问题，因为接地太硬或接地电阻太大而无法达到所需的接地电阻。为了帮助规划接地设备，已创建了一个地理信息系统（GIS）层。最简单的形式是用彩色编码图表示最可能的接地装置：一根垂直驱动的杆（用深绿色表示）。多个垂直驱动杆（浅绿色指示）;水平沟槽，不可能安装杆（用黄色表示）;对于困难的地面，请进行专业安装（即钻孔;用红色表示）。但是，可以查询GIS以提供特定于站点的信息，例如站点条件，可能的安装深度和所需的接地材料数量。 GIS是根据土壤，表层和基岩地质构造的空间模型创建的，该模型具有工程强度和电阻率值。已将预期的接地棒电阻，棒或槽的长度以及所有可能的接地条件组合的计算结果与四种建议的安装方案中的每一个生成GIS层所需的“可能”条件进行了比较。该分析已应用于英格兰中部地区的Western Power Distribution的电网分布区域，以及涵盖East Anglia，伦敦和英格兰SE的UK Power Networks。由于GIS基础的空间模型是从国家数据库中构建的，因此可以将分析扩展到英国的其他地区。

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