基于拓扑推衍的电网调控全局故障检测方法  

Global fault detection method for power grid regulation based on topology derivation

作　　者：刘阳 李云鹏 李典 王小旻 葛昭 LIU Yang;LI Yunpeng;LI Dian;WANG Xiaomin;GE Zhao(Nantong Power Supply Branch of State Grid Jiangsu Power Supply Company,Nantong 226001,China;State Grid Nantong Tongzhou District Power Supply Company,Nantong 226300,China)

机构地区：[1]国网江苏省电力有限公司南通供电分公司,江苏南通226001 [2]网南通市通州区供电公司,江苏南通226300

出　　处：《电子设计工程》2025年第7期72-75,80,共5页Electronic Design Engineering

基　　金：国家电网江苏省电力公司南通供电分公司课题(SGJSNTOOKJJS2310608);国网江苏省电力公司孵化项目资助课题(JF2023017)。

摘　　要：电网系统由较多设备、线路和节点组成,存在多种不同类型的故障,受谐波能量影响,无法精准检测故障电流。为此,提出基于拓扑推衍的电网调控全局故障检测方法。建立邻接矩阵用来描述拓扑推衍过程的元件、保护和断路器之间的映射关系,根据端口连接特性,构建全局故障检测结构。以电网调控全局电流和谐波能量在故障前后的变化幅值为故障特征,基于拓扑推衍原理,判别电网调控全局故障。通过实验结果可知,该方法检测三种故障类型下的电流值变化范围分别是-0.5~0.5 kA、-3~3 kA和-10~1.5 kA,与实际值仅存在最大为0.5 kA的误差,能够精准检测故障。The power grid system is composed of many devices,lines and nodes,and there are many different types of faults.Affected by harmonic energy,the fault current cannot be accurately detected.Therefore,a global fault detection method for power grid regulation based on topologiy derivation is proposed.An adjacency matrix is established to describe the mapping relationship between components,protection and circuit breakers in the topology derivation process,and a global fault detection structure is constructed according to the port connection characteristics.Taking the amplitude of global current and harmonic energy before and after the fault as the fault characteristics,the global fault of power network regulation is identified based on topology derivation principle.According to the experimental results,the variation range of current values under three types of faults detected by this method is-0.5~0.5 kA,-3~3 kA and-10~1.5 kA respectively,and there is only a maximum error of 0.5 kA from the actual value,which can accurately detect faults.

关 键 词：拓扑推衍 电网调控 全局故障 全局电流 谐波能量 

分 类 号：TN454[电子电信—微电子学与固体电子学]