基于遗传算法的电压法和电阻法在地网导体缺失诊断中的性能对比  

Comparison of performance between voltage and resistance methods in GA-based diagnosis for conductor loss in grounding grid

作　　者：刘渝根[1] 骆仁意 尚龙龙 冷迪 王建南[1] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044 [2]深圳供电局有限公司,广东深圳518054

出　　处：《电力自动化设备》2014年第10期121-127,共7页Electric Power Automation Equipment

基　　金：国家创新研究群体基金资助项目(51021005)~~

摘　　要：为准确检测新建地网导体缺失,建立了地网导体缺失诊断的0-1背包模型,基于二进制遗传算法编写了MATLAB地网导体缺失诊断程序,分别建立了电阻法、电压法的适应度函数。以重庆110 kV徐家坪变电站实际地网为例进行了仿真实验。结果表明:对于新建变电站地网的有、无孤立节点出现的导体缺失情况,电压法和电阻法的诊断结果均无误诊和漏诊支路出现。前者单次运行时间约4 min,后者约10 min,对实际工程而言,电压法要更优于电阻法。A 0-1 knapsack model is built for the accurate diagnosis of conductor loss in grounding grid,a corresponding program is written in MATLAB based on the binary genetic algorithm and the fitness functions are established for the voltage and resistance methods respectively. Simulation is carried out for an actual grounding grid of 110 kV substation and results show that,for a new-built substation grounding grid,no matter there is isolated node or not,the diagnostic results of both methods are correct and without any branch missed. Their time consumptions per an operation are 4 min and 10 min respectively,showing the voltage method is superior to the resistance method in practical application.

关 键 词：地网 导体缺失诊断 数学模型 遗传算法 电阻法 电压法 适应度 

分 类 号：TM862[电气工程—高电压与绝缘技术]