Results 211 to 220 of about 420 (253)

Use of a Deformation Coefficient for Transformer Winding Diagnostics

International Journal of Emerging Electric Power Systems, 2008
This paper presents a novel method for deformation diagnostics of transformer windings using terminal measurements. The shortcomings of existing practices in locating deformation and determining its extent are discussed. The logical steps involved in devising the new method are elaborated.
Prasad M Joshi, S V Kulkarni
openaire   +1 more source

Monitoring of transformer winding deformation by CPRA method

2012 IEEE International Conference on Condition Monitoring and Diagnosis, 2012
In this paper new method for transformer winding statement have been considered. The practical results of defect location in the insulation of high voltage equipment in laboratory and real substations conditions are presented and discussed. Theoretical background and technical implementation of the method of CPRA (Corona Pulses Response Analysis ...
V. Rusov, S. Zhivodernikov
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

A novel approach for on-line deformation diagnostics of transformer windings

IEEE PES General Meeting, 2010
This paper discusses an elegantly simple on-line approach for deformation diagnostics of transformer winding. The Current Deviation Coefficient (CDC) derived from terminal current measurements at a selected high frequency (HF) is found to be an effective indicator for locating deformed section of the winding.
P M Joshi, S V Kulkarni
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 new method of transformer winding deformation detection

Ferroelectrics
Xiangyu Tan, Wenbin Zhang
exaly   +2 more sources