Method of building transformer acoustic diagnosis database based on multi physical field coupling modeling

Zhengyang Wu,Weidong Wu,C.-W Chow,Qinghua Wang,Shouchun Guo,Li Ma,Yulin Lu,S Trukhanov

doi:10.1051/e3sconf/202126002013

Zhengyang Wu, Weidong Wu + Show 6 more

Open Access

https://doi.org/10.1051/e3sconf/202126002013

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Abstract

In this paper, a method of building dynamic acoustic diagnosis database of dry-type transformer is proposed. The method is mainly combined with collecting the basic noise of transformer and simulating the acoustic signals of transformer under different working conditions to improve the fault database of transformer. Due to the incomplete working conditions on site, the simulated working conditions are relatively complete, and the marked acoustic signal file is generated, and then form the composition of the database. This paper focuses on the finite element simulation analysis of transformer vibration and noise radiation based on COMSOL, and the idea of establishing transformer biological diagnosis database. Improve the efficiency of transformer fault design and research, and provide reliable and convenient data services for researchers.

Highlights

In the power system, as one of the important power equipment, transformer has a large number, long operation time and many kinds of specifications, so the failure rate is high
Some experienced staff can experience when inspecting the power transformer: the noise is stable in normal operation; when the transformer fails or external disturbance occurs, the noise will change to a certain extent, such as "bang", "Pa Pa Pa", "buzz" and so on [2]
This paper focuses on the analysis of using COMSOL multiphysics finite element simulation software to establish the multi physical field simulation model of the transformer, focusing on the vibration displacement deformation of the transformer structure in the magnetic field, and the noise distribution caused by the structure vibration

Summary

Introduction

As one of the important power equipment, transformer has a large number, long operation time and many kinds of specifications, so the failure rate is high. Some experienced staff can experience when inspecting the power transformer: the noise is stable in normal operation; when the transformer fails or external disturbance occurs, the noise will change to a certain extent, such as "bang", "Pa Pa Pa", "buzz" and so on [2]. This auscultation method is difficult to be widely used because of its legal factor. Transformer fault database is an important platform for the research of audible transformer fault diagnosis.

Magnetic field analysis of transformer with multiple physical fields

Simulation modelling and simulation results

Conclusion