FAN Bintao, WU Shuyu, JI Shengchang, et al. Vibration Characteristic Analysis of Transformer Under Harmonic Current with Different Contents[J]. High voltage apparatus, 2025, 61(2): 46-53.
DOI:
FAN Bintao, WU Shuyu, JI Shengchang, et al. Vibration Characteristic Analysis of Transformer Under Harmonic Current with Different Contents[J]. High voltage apparatus, 2025, 61(2): 46-53. DOI: 10.13296/j.1001-1609.hva.2025.02.006.
Vibration Characteristic Analysis of Transformer Under Harmonic Current with Different Contents
The harmonic current flowing through the winding of transformer has a great influence on the vibration. On this basis
the influence of harmonic current on the vibration is studied emphatically. Through theoretical derivation
the cause of the vibration harmonics of transformer winding are described from the aspect of electromagnetic excitation. The harmonic loading system of the transformer is set up
and the variation of vibration characteristics and the vibration characteristic parameters under the action of harmonic current with different contents are compared. Based on the vibration online vibration monitoring system
the variation of vibration characteristic parameters with time sequence
magnitude and sequence of current as well as the influence of harmonics on vibration are studied. The study results show that the harmonic current causes the winding vibration and the vibration harmonic content to increase
and the different vibration characteristic parameters have a certain correlation with the total distortion rate of the harmonic current. The influence of the magnitude of current and the total distortion rate of the harmonic must be taken into account in the mechanical condition monitoring and fault diagnosis of the winding of transformer by the vibration method.