基于柔性石墨复合接地模块的配电杆塔接地降阻研究  

Research on Grounding and Resistance Reduction of Power Distribution Poles Based on Flexible Graphite Composite Grounding Module

作　　者：张凯 吴晓东 代佰华 毛惠卿 胡元潮[2] ZHANG Kai;WU Xiaodong;DAI Baihua;MAO Huiqing;HU Yuanchao(State Grid Binzhou Power Supply Company,Binzhou 256600,China;Shandong University of Technology,Zibo 255000,China)

机构地区：[1]国网山东省电力公司滨州供电公司,山东滨州256600 [2]山东理工大学,山东淄博255000

出　　处：《山东电力技术》2023年第9期10-17,共8页Shandong Electric Power

基　　金：国家自然科学基金项目(51807113);山东省自然科学基金项目(ZR2021ME092)。

摘　　要：配电线路中接地装置的接地性能对配电线路稳定运行非常重要,降低杆塔接地电阻是提高线路耐雷水平,减少线路雷击跳闸率的主要措施。为研究杆塔接地网敷设柔性石墨复合接地模块的杆塔接地降阻情况,建立2种敷设柔性石墨复合接地模块的杆塔接地网降阻模型,分析接地网尺寸、石墨接地模块长度、石墨接地模块数量和土壤电阻率对杆塔降阻的影响,并进一步分析石墨接地模块长度、石墨接地模块数量和石墨接地模块敷设方式对杆塔降阻效率的影响。研究结果表明:在杆塔接地网上敷设柔性石墨复合接地模块,杆塔接地电阻明显降低,随着石墨接地模块长度和石墨接地模块数量的增加,杆塔接地电阻逐渐降低,石墨接地模块长度和数量对杆塔接地网的降阻效率有明显的影响,而土壤电阻率对杆塔接地网的降阻效率的影响很小,水平敷设柔性石墨复合接地模块比垂直敷设降阻效果更好。研究结果可为实际配电线路杆塔接地降阻提供参考。The grounding performance of the grounding device in the distribution line is very important for the stable operation of the distribution line.Reducing the tower grounding resistance is the main measure to improve the level of line lightning resistance and reduce the trip rate of the line lightning strike.In order to study the grounding resistance reduction of the pole tower grounding network with flexible graphite composite grounding module,two types of grounding network resistance reduction models with flexible graphite composite grounding module were established.The effects of grounding network size,graphite grounding module length,graphite grounding module quantity and soil resistivity on the resistance reduction of the pole tower were analyzed.The effects of graphite grounding module length,graphite grounding module quantity and graphite grounding module laying method on the resistance reduction efficiency of the pole tower was further analyzed.The results show thatthe grounding resistance of the tower is significantly reduced by laying flexible graphite composite grounding modules on the grounding network of the tower.The grounding resistance of the tower is gradually reduced as the length of graphite grounding modules and the number of graphite grounding modules increase.The length and number of graphite grounding modules have obvious influence on the resistance reduction efficiency of the tower grounding network,while the soil resistivity has little influence on the resistance reduction efficiency of the tower grounding network.The horizontal laying of flexible Graphite composite grounding module has better resistance reduction effect than vertical laying,and can better reduce the grounding resistance of the pole tower.The research results can provide reference for the actual distribution line pole tower grounding resistance reduction.

关 键 词：接地电阻 柔性石墨复合接地模块 杆塔降阻 降阻效率 

分 类 号：TM726[电气工程—电力系统及自动化]