斜防雷接地体对接地电阻的优选分析  

Analysis on the Effect of Grounding Resistance of Oblique Lightning Protection Grounding Body

作　　者：秦健[1] 糜翔[1] 杜睿[1] 

机构地区：[1]重庆市防雷中心,重庆401147

出　　处：《工程建设与设计》2016年第6期84-86,共3页Construction & Design for Engineering

摘　　要：利用平均电位法,研究得出单根防雷斜接地体及4根斜接地体接地电阻计算方法,利用公式进行了实例分析。研究结果表明,单根斜接地体接地电阻与斜置角度呈正相关性,先缓慢变大,60°时开始变大趋势加快;在水平接地网的4个边角敷设斜接地体,能够有效降低接地电阻,斜置角度为50~60°时降阻效果最优。通过斜接地体的接地角度优选,可降低防雷接地电阻,对土壤电阻率高的地区使接地电阻符合技术规范要求具有实际意义。Make use of the average potential method, the grounding resistance calculation method of single oblique lightning protection grounding body and four oblique bodies was obtained; an example analysis was made by using the formula. Research results show that there was a positive correlation between the grounding resistance of single oblique grounding body and the inclined angle; the resistance increased slowly, after the inclined angle achieved 60 degrees,the resistance increased faster. The grounding resistance was effectively reduced by laying oblique grounding body on the four corners of horizontal grounding grid; the effect of resistance reduction is optimal when the inclined angle is 50 degrees to 60 degrees. The lightning protection grounding resistance can be reduced by choose an optimum angle of oblique grounding. It has a practical significance to the grounding resistance of the high soil resistivity area accorded with technical specification.

关 键 词：平均电位法 斜接地体 降阻 

分 类 号：TU774.4[建筑科学—建筑技术科学] TM862.3[电气工程—高电压与绝缘技术]