综合接地技术在水电站接地中的应用

Application of Comprehensive Grounding Technology in Hydropower Station

我国大部分水电站由于地处土壤电阻率较高的山区,且用以降低接地电阻的可用土地很少,接地电阻往往难以达到国家有关标准的规定和要求。针对以上问题,结合贵州大花水电站实际情况,采用深井接地,敷设接地模块、SZJ接地装置、复合地网等不同降低接地电阻技术综合应用的方法以达到降低复杂地理环境下水电站的接地电阻的目的。工程应用情况证明,该方法不受地理条件的限制,安全可靠,接地电阻稳定。

In China, most of hydropower station is located in the mountain area with high resistivity soil, and usable land which can reduce the grounding resistance is little, so the grounding resistance is difficul to reach state-specified standard. In this paper, according to Dahuashui hydropower station in Guizhou actual situation, there are some methods, such as deep-well grounding, laying grounding blocks, laying SZJ grounding device, that are used to reduce the grounding resistance of hydropower station. It is confirmed that these methods are safe reliability, grounding resistance stability, no limits on geographical conditions in practical projects.