电力系统保护与控制2025，Vol.53Issue(24)：1-12,12.DOI:10.19783/j.cnki.pspc.250109
基于漏磁场相位变化特征的变压器绕组早期故障保护研究
Research on early fault protection of transformer windings based on leakage magnetic field phase change characteristic
摘要
Abstract
To address the difficulty of traditional transformer protection in effectively identifying early-stage faults such as minor inter-turn short circuits in transformer windings,this paper proposes an early fault protection scheme for transformer windings based on the phase change characteristics of the leakage magnetic field.First,an analytical model of the leakage magnetic field for a transformer with a non-ideal winding structure is established,and the variation of magnetic leakage distribution before and after winding failures is analyzed.Then,by combining the fault components such as magnetic leakage phase mutation,phase differences among multiple measuring points,and leakage amplitude ratio,a leakage phase differential protection criterion and a fault location logic are proposed,effectively avoiding the influence of temperature on the optical fiber measurement system.The leakage magnetic field analytical model is also used for setting the operating thresholds of the protection scheme.Finally,the feasibility and effectiveness of the proposed early fault identification and location scheme are verified by dynamic model experiments and finite element simulations.关键词
非理想绕组变压器/漏磁场/相位变化/早期故障保护Key words
non-ideal winding transformer/leakage magnetic field/phase change/early fault protection引用本文复制引用
邓祥力,刘美含,曾平,周德生,杜炤鑫,冯倩..基于漏磁场相位变化特征的变压器绕组早期故障保护研究[J].电力系统保护与控制,2025,53(24):1-12,12.基金项目
This work is supported by the Science and Technology Project of State Grid Corporation of China(No.520940240037). 国家电网有限公司科技项目资助(520940240037) （No.520940240037）
国家自然科学基金项目资助(51777119) （51777119）
