接地装置冲击特性场路耦合分析方法研究  

Field-Circuit Coupling Analysis Method for Impact Characteristics of Grounding Devices

作　　者：王朋成 郭蕾[1] 刘彬 梅诚 徐晗[1] 王路伽 陈斯翔 WANG Peng-cheng;GUO Lei;LIV Bin;MEI Cheng;XU Han;WANG Lu-jia;CHEN Si-xiang(College of Electrical Engineering,Southwest Jiaotong University,Chengdu 611756,China;State Grid Foshan Electric Power Supply Company,Foshan 528000,China)

机构地区：[1]西南交通大学电气工程学院,四川成都611756 [2]南网佛山供电公司,广东佛山528000

出　　处：《水电能源科学》2019年第12期161-165,共5页Water Resources and Power

基　　金：广东电网公司科技项目(GDKJXM20182401)

摘　　要：输电杆塔接地装置的冲击特性是影响输电线路安全运行的重要因素之一,在低土壤电阻率下由于忽视接地装置的冲击特性给电网的安全运行带来隐患。因此,结合接地装置的电路理论、电磁场理论和有限元方法提出一种分析接地装置冲击特性的场路耦合分析方法。综合考虑接地体在高频下的自感、互感及电流在土壤中的散流特性,减少模型等效,计算精度较高。利用该方法分析了低土壤电阻率下注入电流频率为0~500kHz的接地体性能及2.6/50μs的冲击电流下导体电势分布,并与CDEGS软件分析结果进行对比,验证了该方法的有效性。The impact characteristics of the transmission tower grounding device are one of the important factors affecting the safe operation of the transmission lines.Under the low soil resistivity,the impact of the grounding device is neglected,which brings hidden dangers to the safe operation of the grid.Therefore,combined with the circuit theory of the grounding device,electromagnetic field theory and finite element method,a field-path coupling analysis method is proposed for analyzing the impact characteristics of the grounding device.Considering the self-inductance,mutual inductance and current dispersion characteristics of the grounding body in the soil,the model is equivalent and the calculation accuracy is high.The performance of the grounding body with the injection current frequency of 0~500 kHz and the conductor potential distribution under the impact current of 2.6/50μs under low soil resistivity are analyzed by this method.The effectiveness of the proposed method is verified by comparison of CDEGS software.

关 键 词：接地装置 电感效应 电磁场理论 场路耦合方法 

分 类 号：TM862[电气工程—高电压与绝缘技术]