Weak Fault Detection of Rotor Winding Inter-Turn Short Circuit in Excitation System Based on Residual Interval Observer

作     者：Gang Liu Xinqi Chen Lijuan Bao Linbo Xu Chaochao Dai Lei Yang Chengmin Wang 

作者机构：Zhejiang Zheneng Jiahua Power Generation Co.Ltd.Hangzhou314201China Zhejiang Zheneng Technology Research Institute Co.Ltd.Hangzhou310000China Zhejiang Key Laboratory of High EfficiencyEnergy Saving and Pollutant Control Technology for Thermal Power GenerationHangzhou310000China Shanghai Jiaotong UniversityShanghai200240China 

出 版 物：《Structural Durability & Health Monitoring》 (结构耐久性与健康监测（英文）)

年 卷 期：2023年第17卷第4期

页      面：337-351页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 

基　　金：supports from National Science Foundation of China(Grant No.51777121) 

主　　题：Excitation system interval observer rotor winding weak fault detection inter-turn shortcut 

摘      要：Aiming at the fact that the rotor winding inter-turn weak faults can hardly be detected due to the strong electromagnetic coupling effect in the excitation system,an interval observer based on current residual is ***,the mechanism of the inter-turn short circuit of the rotor winding in the excitation system is modeled under the premise of stable working conditions,and electromagnetic decoupling and system simplification are carried out through Park *** interval observer is designed based on the current residual in the two-phase coordinate system,and the sensitive and stable conditions of the observer is *** fault diagnosis process based on the interval observer is formulated,and the observer gain matrix is convexly optimized by linear matrix *** numerical simulation and experimental results show that the inter-turn short circuit weak fault is hardly detected directly through the current signal,but the fault is quickly and accurately diagnosed through the residual internal *** with the traditional fault diagnosis method based on excitation current,the diagnosis speed and accuracy are greatly improved,and the probability of misdiagnosis also *** method provides a theoretical basis for weak fault identification of excitation systems,and is of great significance for the operation and maintenance of excitation systems.