基于压力注浆的深井接地技术在变电站中的应用研究

摘要

接地网子系统作为电力系统中不可缺少的关键环节,在保证电力系统及其设备的安全运行方面发挥重要的作用,而各形式的接地技术也得到广泛关注.压力注浆深井接地技术因其在降阻效果与经济性方面的优势已得到大量应用.对基于压力注浆的深井接地技术的降阻机理、注浆施工工艺等进行了研究,结合实际变电站降阻改造,通过试验和数据分析对该技术在变电站应用中的接地电阻、降阻率系数随土壤视电阻率的变化规律及稳定性等进行了详细分析,将为基于压力注浆的深井接地技术在变电站中的应用提供有益参考.%The grounding network subsystem,which acts as a key link in the power system,plays an important role in ensuring the safe operation of the power system and its equipment,and various grounding techniques for the system have received wide attention.The deep-ground-well method based on pressure grouting has been widely used due to its advantages in decreasing grounding resistance and economical benifits.In this paper,the reduction mechanism and grouting process of the deep-ground-well method based on pressure grouting are studied.Combined with the reduction of the actual substation,the variation law and stability of the grounding resistance and the derating resistance coefficient with apparent soil resistivity are analyzed in detail through the test and data analysis.