Title :
Detection of Winding Deformations During Short Time Current Tests
Author :
Santhi, S. ; Jayalalitha, S. ; Kumar, V. Jagadeesh ; Jayashankar, V.
Author_Institution :
Dept. of Electr. Eng., Indian Inst. of Technol., Chennai
Abstract :
Transformers are required to demonstrate the ability to withstand short circuit currents. Over currents due to short circuit can cause winding deformation. A new method of testing and analyzing winding deformation online without untanking is presented in this paper. A study of alternate excitations to detect winding deformation is made. A comparison of Fourier transform and Wigner-Ville distribution methods of analysis is carried out
Keywords :
Fourier transforms; Wigner distribution; automatic test equipment; deformation; power transformer testing; transformer windings; Fourier transforms; Wigner-Ville distribution method; online testing method; short time current tests; transformer windings; winding deformation detection; Circuit testing; Fourier transforms; Frequency estimation; Frequency response; Geometry; Mathematical model; Power transformers; Short circuit currents; Thermal loading; Transfer functions;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 2005. IMTC 2005. Proceedings of the IEEE
Conference_Location :
Ottawa, Ont.
Print_ISBN :
0-7803-8879-8
DOI :
10.1109/IMTC.2005.1604100
