Results 21 to 30 of about 4,341 (292)

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

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

Analysis of the Electromechanical Characteristics of Power Transformer under Different Residual Fluxes

Energies, 2021
When the electromagnetic transients occur in a power transformer, an inrush current is generated in its winding. The inrush current not only affects the performance of the transformer windings, but also affects the lifetime of the transformer.
Wenqi Ge, Chenchen Zhang, Yi Xie, Ming Yu, Youhua Wang   +4 more
doaj   +1 more source

A new test setup to measure the AC losses of the conductors for NET [PDF]

, 1991
A description is given of a new test system currently under construction. The system will be used to measure the AC losses of subcables from Next European Torus (NET) conductors.
Kate, H.H.J. ten, Klundert, L.J.M. van de, Mulder, G.B.J., Nijhuis, A.   +3 more
core   +3 more sources

An Experimental Study of the Sweep Frequency Impedance Method on the Winding Deformation of an Onsite Power Transformer

Energies, 2020
Power transformers are one of the most important devices in electrical networks. The safety operation of the transformers directly affects the reliability of the power system. To diagnose the internal deformation of the transformer as soon as possible is
Song Wang, Shuang Wang, Ying Cui, Jie Long, Fuqiang Ren, Shengchang Ji, Shuhong Wang   +6 more
doaj   +1 more source

Frequencies Dominations for Different Rating of Distribution Transformer under Transients [PDF]

, 2020
Power transients faults on high voltage lines are prominently due to high frequency transients. These transients affect the predicted life and efficiency of equipment.
Faisal, Haseeb, Hussain, Najeeb, Imdad, Dr Kashif, Sharif, Faisal   +3 more
core  

FIRST-ORDER PERTURBATION APPROACH TO TRANSFORMER WINDING DEFORMATIONS

Progress In Electromagnetics Research Letters, 2013
An on-line method to detect radial mechanical deforma- tions of power transformer winding turns is presented. First-order perturbation theory is applied to a transformer winding surrounded by the transformer tank wall and the iron core. The transformer wind- ing is modeled as thin conducting cylindrical rings (winding segments or turns) situated within
Mariana Dalarsson, Martin Norgren
openaire   +1 more source

Axial and radial electromagnetic‐vibration characteristics of converter transformer windings under current harmonics

High Voltage, 2023
The winding current harmonic content of converter transformer in operation is rich. However, affected by harmonics, the radial vibration characteristics are quite different from the power transformer, structural loosening and deformation caused by ...
Peiyu Jiang, Zhanlong Zhang, Zijian Dong, Yu Yang, Zhicheng Pan, Jun Deng   +5 more
doaj   +1 more source

SFRA, Detect Of Winding Deformation in Power Transformer

IOSR Journal of Electrical and Electronics Engineering, 2014
The sweep frequency response analysis is extensively used technique for detect hidden fault and condition monitoring of power transformer. The operation is carried out by supply a low voltage signal of varying frequencies to the transformer windings and measuring both the input and output signals.
Shivangi Rai, (Prof.) N.P Gupta
openaire   +1 more source