Results 211 to 220 of about 433 (255)

Deformation simulation and analysis of power transformer windings

2016 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC), 2016
Power transformers are critical in power systems and the stable operation of power transformers is a vital guarantee of system stability. However, with the development of capacity and voltage level, the external short-circuit fault threats the stable and secure operation of power transformers more seriously than ever before.
null Zhengyuan Li, null Zhiguo Hao, null Chenguang Yan, null Yiqi Dang, null Hongxiang Xu, null Baohui Zhang   +5 more
openaire   +1 more source

On-line monitoring of winding deformation of power transformer

Proceedings of 2001 International Symposium on Electrical Insulating Materials (ISEIM 2001). 2001 Asian Conference on Electrical Insulating Diagnosis (ACEID 2001). 33rd Symposium on Electrical and Electronic Insulating Materials and Applications in System, 2002
The feasibility of estimating transformer winding deformation by measuring short-circuit reactance is expounded. Based on the theoretical research, the on-line measurement system for short-circuit reactance of a transformer is proposed. The study on a power transformer in actual operating condition shows that the on-line method is satisfactory for ...
D.K. Xu, J.H. Huang, Y.M. Li
openaire   +1 more source

Transformer winding diagnostics using deformation coefficient

2008 IEEE Power and Energy Society General Meeting - Conversion and Delivery of Electrical Energy in the 21st Century, 2008
This work presents the use of terminal capacitance measurements to detect deformations in transformer windings. The lumped parameter representation of windings is considered. The deformation coefficient (DC) derived from the measurements is used to detect winding deformations. The extent and location of deformation can also be determined by this method.
JOSHI, PM, KULKARNI, SV
openaire   +2 more sources

Deformation analysis of transformer winding by structure parameter

Proceedings of the 7th International Conference on Properties and Applications of Dielectric Materials (Cat. No.03CH37417), 2004
Frequency Response Analysis can be used to detect the transformer winding deformation. Its reliability and standard are studied. A simulation model of transformer winding is developed. The transformer winding is equivalent to a network circuit, and electrical components in the circuit can describe distributed elements of the winding.
null Junfeng Gui, null Wensheng Gao, null Kexiong Tan, null Shengyou Gao   +3 more
openaire   +1 more source

Locating mechanical deformations in electromagnetic model of transformer winding

2014 Eighteenth National Power Systems Conference (NPSC), 2014
This paper presents a diagnostic method for locating and assessing the severity of mechanical deformations in an electromagnetic model of transformer winding. The proposed method involves performing frequency response analysis on the model and capturing its high frequency behaviour through terminal measurement.
Shah Krupa Rajendra, K Ragavan
openaire   +1 more source

Transformer Winding Deformation Diagnosis Based on Signal Distance

2019 22nd International Conference on Electrical Machines and Systems (ICEMS), 2019
Aiming at the problem that the current frequency response method still lacks an effective tool for consistent quantitative evaluation in data analysis, and the correlation coefficient method cannot judge the deformation of the transformer winding when the measured frequency response curve is the same as the reference frequency response curve with the ...
Shengmin Li, Dan Zhao, Yuanyuan He
openaire   +1 more source

Study on ultrasonic measurement device for transformer winding deformation

Proceedings. International Conference on Power System Technology, 2003
A new measurement method for transformer winding deformation is proposed based on the ultrasonic reflection principle. The basic principle for winding deformation measurement, the structure and operation principle of the device are introduced in detail, and the factors, such as oil temperature, oil passages and others, which affect the measurement ...
null Shu Naiqiu, null Zhou Can, null Hu Fang, null Liu Qisheng, null Zheng Lingwei   +4 more
openaire   +1 more source

Survey of Frequency Response Analysis on Winding Deformation of Transformers

2019 4th International Conference on Intelligent Green Building and Smart Grid (IGBSG), 2019
As a core equipment in power system, power transformer plays a vital role in the stability of the power grid. It is necessary to quickly and accurately monitor the fault of the transformer. Frequency response method is an important method for fault diagnosis of transformers.
Zhenhua Li, Yangpo Zhang, Binxin Zhu, Yufei Luo, Tao Zhang, Zhi Zhang   +5 more
openaire   +1 more source

Research on integration of transformer protection and winding deformation detecting

2010 International Conference on Power System Technology, 2010
In this paper, the integrated conception of transformer protection principle based on equivalent equation and winding deformation on-line detecting has been presented. The transformer protection principle based on equivalent equation has been researched.
Z. G. Hao, B. H. Zhang, C. G. Yan, B. Shao, X. F. Ren, Z. Q. Bo   +5 more
openaire   +1 more source

Winding Deformation Detection of Transformer Based on Sweep Frequency Impedance

2019
To improve the timeliness and accuracy of transformer winding deformation detection, the deformation of the transformer winding is studied by sweeping frequency impedance method. Based on the principle of scanning impedance method, an experimental test circuit is constructed to perform on-site detection on a 10 kV transformer.
Hui Zhang, Tao Wang, Yunshan Zhang, Yujie Pei, Zhongbin Bai, Ling Guan, Yaoding Gu, Jianguo Xu   +7 more
openaire   +2 more sources