电力系统及其自动化学报2025，Vol.37Issue(7)：102-112,11.DOI:10.19635/j.cnki.csu-epsa.001649
利用漏磁场幅值特征的变压器绕组早期故障定位方法
Early Fault Localization Method for Transformer Windings Using Leakage Magnetic Field Amplitude Characteristics
摘要
Abstract
It is difficult for traditional transformer protection to identify the early faults of transformer windings such as winding deformation and minor turn-to-turn short-circuit faults,and the positions of winding faults cannot be accurately located.In this paper,a method for identifying and locating the early faults in transformer windings is proposed by using changes in the distribution of transformer space leakage magnetic field.First,a general analytical calculation model of transformer space leakage magnetic field is established,which is used to analyze the changing characteristics of leakage magnetic field fault quantity under winding deformation and minor turn-to-turn short-circuit faults.Then,the unbal-anced characteristics of leakage magnetic field at the end and middle of windings under fault are used to determine the leakage magnetic field differential protection and the winding fault localization scheme based on the steady-state quanti-ty of leakage magnetic field and fault components.In addition,the leakage magnetic field differential protection fixed value is adjusted,and the sensitivity calibration is performed.Finally,a finite element simulation model and a physical dynamic-mode test model were established to verify the effectiveness of this protection and the winding fault localization strategy.Results show that the proposed method is capable of on-line identification and localization of transformer wind-ing deformation and minor turn-to-turn short-circuit faults.关键词
变压器/绕组早期故障/漏磁场分析/绕组故障判别/绕组故障定位Key words
transformer/early winding fault/leakage field analysis/winding fault identification/winding fault localiza-tion分类
信息技术与安全科学引用本文复制引用
邓祥力,王振,曾平,周德生,杜炤鑫..利用漏磁场幅值特征的变压器绕组早期故障定位方法[J].电力系统及其自动化学报,2025,37(7):102-112,11.基金项目
国网上海市电力公司科技项目(520940240037). （520940240037）
