In order to accurately extract the characteristic frequency of the vibration signal of the transformer core, a fault diagnosis method based on variational mode decomposition (VMD) and sparse decomposition is proposed for the non-linear, non-stationary and low signal-to-noise ratio of the vibration signal of transformer core. The fundamental frequency (100 Hz) and some frequency doubling component are included in the vibration signal of the transformer core. After the failure of the transformer core, the characteristic frequency in the vibration signal of the core also changes. Firstly, the signal is sparsely decomposed and denoised, and the noise-reduced signal is subjected to VMD decomposition. Then, the characteristic components are selected from the decomposed components for spectrum analysis. Finally, the state of the core is detected.
Research on Transformer Core Loosening Fault Diagnosis Based on VMD
Lect. Notes Electrical Eng.
International Conference on Electrical and Information Technologies for Rail Transportation ; 2019 ; Qingdao, China October 25, 2019 - October 27, 2019
Proceedings of the 4th International Conference on Electrical and Information Technologies for Rail Transportation (EITRT) 2019 ; Kapitel : 64 ; 671-682
08.04.2020
12 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Research on Transformer Core Loosening Fault Diagnosis Based on VMD
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