Results 1 to 10 of about 1,478,429 (232)

Predicting the Temperature Rise in Oil-Immersed Transformers Based on the Identification of Thermal Circuit Model Parameters

Energies
The temperature rise test for transformers is time-consuming, energy-intensive, and has low detection efficiency. To improve the efficiency of the temperature rise test and reduce energy consumption, this paper proposes a temperature rise prediction ...
Yujia Hu, Li Wang, Jialing Li, Huiying Weng, Zhiyao Zheng, Guohao Wen, Fan Zhang   +6 more
doaj   +1 more source

Construction of a gas–liquid two-phase mass transfer model for fault-generated gas in converter transformers and analysis of gas diffusion distribution characteristics

AIP Advances
Large oil-immersed transformers, due to their complex structure and high capacity, exhibit a significant time-delay effect when characteristic gases generated by internal faults diffuse to monitoring points.
Xudong Peng, Hao Zhan, Mengqi Li, Tao Xie, Meng Zhou, Haohao Qin, Chuan Zhang   +6 more
doaj   +1 more source

Effect of oil immersion on the horizontal flame spread over transformer insulating paperboard with different sizes

Case Studies in Thermal Engineering
Transformer oil and insulating paperboard are widely used in oil-immersed transformers and may be ignited in the event of device failure. The present study aims to investigate the effect of oil immersion on the horizontal flame spread over the ...
Yubiao Huang, Yi Guo, Fengju Shang, Jiaqing Zhang   +3 more
doaj   +1 more source

Multi-point grounding fault diagnosis and temperature field coupling analysis of oil-immersed transformer core based on finite element simulation

Case Studies in Thermal Engineering
In this article, a fault diagnosis method is presented for identifying multi-point grounding faults in transformer cores. Based on the finite element method (FEM), the method aims to achieve non-invasive localization of these faults, thereby minimizing ...
Lingfang Sun, Mengchao Xu, He Ren, Songchun Hu, Guoliang Feng   +4 more
doaj   +1 more source

Research of hot spot temperature calculation in oil-immersed transformer based on modified thermal model

Diance yu yibiao
The hottest spot temperature (HST) of windings of oil-immersed transformer is an important factor that affects load capacity and operation life of transformer, and is closely related to the transformer load, top oil and environment temperature.
ZHANG Xiaohua, LV Zhirui, SUN Yunsheng, HUANG Bin, WANG Yongqiang   +4 more
doaj   +1 more source

Motion Characteristics of Copper Particles in Oil Immersed Transformer Insulating Oil and its Effect on Insulation Performance

Advances in Electrical and Computer Engineering
Oil-immersed transformers a key equipment in the power system, their safe and stable operation of the entire power system has an important impact. Oil-immersed transformers generate metal particles during production and transport, which can trigger ...
YANG, H., MA, J., ZHOU, S., CHEN, M., ZHOU, F., ZHANG, L.   +5 more
doaj   +1 more source

Simulation analysis method of hot spot temperature of oil-immersed transformer based on temperature field calculation

Diance yu yibiao
With the construction of large-capacity pumped storage power plants, the problem of transformer winding overheating become more prominent. Given the technical shortage of the real-time monitoring for hot spot temperature of oil-immersed transformers in ...
PAN Wenxia, CHEN Xingchi, ZHAO Kun, GAO Congchuang   +3 more
doaj   +1 more source

Based on PCA and SSA-LightGBM oil-immersed transformer fault diagnosis method.

PLoS ONE
A fault diagnosis method for oil immersed transformers based on principal component analysis and SSA LightGBM is proposed to address the problem of low diagnostic accuracy caused by the complexity of current oil immersed transformer faults. Firstly, data
Jizhong Wang, Jianfei Chi, Yeqiang Ding, Haiyan Yao, Qiang Guo   +4 more
doaj   +1 more source

FEM Simulation of FDS Response in Oil-Impregnated Paper Insulation of Current Transformers with Axial Aging Variation

Energies
The aging of oil-impregnated paper (OIP) insulation is one of the key factors influencing the service life of oil-immersed current transformers. Frequency domain spectroscopy (FDS), supported by mathematical models or simulation methods, is commonly used
Lujia Wang, Yutong Zhang, Ling Yang, Xiaoyu Hu, Sien Xu, Weimin Huang, Longzhen Wang   +6 more
doaj   +1 more source

Research on Vibration and Noise of Oil Immersed Transformer Considering Influence of Transformer Oil

Energies
This study investigates the vibration and noise characteristics of oil-immersed power transformers, with a particular focus on the influence of transformer oil on structural dynamics and acoustic emission. The research integrates multi-physics modelling,
Xueyan Hao, Sheng Ma, Xuefeng Zhu, Yubo Zhang, Ruge Liu, Bo Zhang   +5 more
doaj   +1 more source