Results 21 to 30 of about 433 (255)

Numerical Investigations for Vibration and Deformation of Power Transformer Windings under Short-Circuit Condition

Energies, 2023
The analysis of the dynamic process of winding destabilization under sudden short-circuit conditions is of great importance to accurately assess the short-circuit resistance of power transformers. Based on magneto-solid coupling, an axisymmetric model of
Jiawei Wang, Yijing Xing, Xikui Ma, Zhiwei Zhao, Lihui Yang   +4 more
doaj   +1 more source

Research on Transformer Winding Deformation and Winding Resistance

DEStech Transactions on Environment, Energy and Earth Science, 2016
In this paper, the influence of transformer winding deformation on the equivalent electrical parameters is studied, and the proximity effect and skin effect caused by AC current in the wire are simulated. It is verified that the current distribution will be affected by the proximity effect and skin effect.
Chen Ling, Puxin Shi, Yusheng Quan, Tiantang Xiang   +3 more
openaire   +2 more sources

A new method for analyzing the impact of winding mechanical defects on the equivalent circuit parameters of power transformers

IET Generation, Transmission & Distribution, 2023
Condition monitoring of the power transformer winding and diagnose of the fault in its incipient stages can prevent the spread of defect, and as a result, the unexpected exit of the transformer.
Hadi Tarimoradi, Milad Askari
doaj   +1 more source

Comprehensive Analysis of Winding Electromagnetic Force and Deformation During No-Load Closing and Short-Circuiting of Power Transformers

IEEE Access, 2021
When an electromagnetic transient occurs in a transformer, certain parts of the winding will be over stressed internally, which in severe cases will lead to the destruction of the winding insulation.
Chenchen Zhang, Wenqi Ge, Yi Xie, Yingying Li   +3 more
doaj   +1 more source

A Feasibility Study of Transformer Winding Temperature and Strain Detection Based on Distributed Optical Fibre Sensors

Sensors, 2018
The temperature distribution and deformation of the transformer windings cannot be measured in a distributed manner by the traditional method and failure location cannot be performed.
Yunpeng Liu, Yuan Tian, Xiaozhou Fan, Yanan Bu, Peng He, Huan Li, Junyi Yin, Xiaojiang Zheng   +7 more
doaj   +1 more source

Research on the Distribution Characteristics of Transformer Axial Vibration under Short-Circuit Conditions Considering Damping Parameters

Applied Sciences, 2022
The existing research on the distribution characteristics of displacement and acceleration of the transformer axial vibration under short-circuit conditions is based on ignoring the damping parameters.
Shuguo Gao, Lu Sun, Yuan Tian, Hongliang Liu   +3 more
doaj   +1 more source

Air Core Transformer Winding Disk Deformation: A Precise Study on Mutual Inductance Variation and Its Influence on Frequency Response Spectrum

IEEE Access, 2018
It is well-known that the deformation of transformer winding can produce detectable changes to the frequency response spectrum compared with a referenced past measurement.
Mehdi Bagheri, Svyatoslav Nezhivenko, B. T. Phung, Trevor Blackburn   +3 more
doaj   +1 more source

Analysis of Winding Vibration Characteristics of Power Transformers Based on the Finite-Element Method

Energies, 2018
The winding is the core component of a transformer, and the technology used to diagnose its current state directly affects the operation and maintenance of the transformer.
Xiaomu Duan, Tong Zhao, Jinxin Liu, Li Zhang, Liang Zou   +4 more
doaj   +1 more source

Improved Winding Mechanical Fault Type Classification Methods Based on Polar Plots and Multiple Support Vector Machines

IEEE Access, 2020
The accurate and fast diagnosis of transformer winding deformation faults is of significance to power suppliers and utilities. An improved winding mechanical deformation fault classification method is proposed.
Jiangnan Liu, Zhongyong Zhao, Kai Pang, Dong Wang, Chao Tang, Chenguo Yao   +5 more
doaj   +1 more source

Fault diagnosis of transformer winding short circuit based on WKPCA-WM and IPOA-CNN

Frontiers in Energy Research, 2023
When the winding of the power transformer is short-circuited, the winding will experience constant vibration, which will cause axial instability of the winding, and then lead to winding looseness, deformation, bulge, etc., therefore, a diagnosis method ...
Xiping Pei, Songtao Han, Yanyan Bao, Wei Chen, Hengjie Li   +4 more
doaj   +1 more source