基于分层模型和智能校验算法的配电网故障定位技术  

The Technology on Fault Location of Distribution Network Based on Hierarchical Model and Intelligent Checking Algorithm

作　　者：王秋杰 金涛[1] 谭洪[2] 李振兴[2] Wang Qiujie;Jin Tao;Tan Hong;Li Zhenxing(College of Electrical Engineering and Automation Fuzhou University Fuzhou 350116 China;College of Electrical and New Energy China Three Gorges University Yichang 443000 China)

机构地区：[1]福州大学电气工程与自动化学院,福州350116 [2]三峡大学电气与新能源学院,宜昌443000

出　　处：《电工技术学报》2018年第22期5327-5337,共11页Transactions of China Electrotechnical Society

基　　金：欧盟FP7国际科技合作基金(909880);国家自然科学基金(61304260)资助项目

摘　　要：针对大量分布式电源接入配电网以后,基于单层逻辑关系构建的定位模型异常复杂、定位算法辨识效率低和稳定性差的不足,提出基于分层结构模型和智能校验算法的故障定位方法,其优势在于:(1)对配电网各支路进行二端口等效后,基于逻辑关系构建的开关函数的维度大幅减小,结构大幅简化;(2)采用分层定位的方法明显降低了故障定位的运算维度,极大提高了定位的效率;(3)利用故障区段定位的绝对可靠性,对故障区域定位结果进行反馈校验,有效弥补了智能算法故障辨识结果不稳定的缺陷。仿真表明,与单层结构的定位模型和无校验机制的智能算法相比,分层结构模型和智能校验算法在具有较好的容错性和稳定性的同时,极大简化了故障辨识模型和提高了故障定位效率,在高渗透率、大型配电网的故障辨识中,优势明显。After a large number of distributed generators are connected to large distribution network,the fault location model based on single layer logic relation is extremely complex,and the location algorithm has low efficiency and poor stability.Therefore,a fault location method based on hierarchical model and intelligent checking algorithm is proposed.Its advantages are:①The dimension of the switching function based on logical relation is greatly reduced and the structure is greatly simplified after two-port equivalence is implemented for each branch of the distribution network.②Hierarchical location obviously reduces the computing dimension of location algorithm,and greatly improves the location efficiency.③Feedback check mechanism,using the location absolute reliability of the exhaustion method to identify the fault area location results,effectively compensates for the instability of the intelligent algorithm in fault identification.The simulation results show that,comparing with the single layer model and the intelligent algorithm without checking mechanism,the hierarchical model and the intelligent algorithm have better fault tolerance and stability,which can greatly simplify the fault identification model and improve the fault location efficiency.In large distribution network with high penetration rate,the new method of fault location has obvious advantages.

关 键 词：配电网 故障定位 分层模型 智能校验算法 

分 类 号：TM72[电气工程—电力系统及自动化] TM77