Virtual instrumentation and its application in diagnosis of faults in power transformers

Author

Ranjan, P Vanaja ; Kumar, K. Udhaya

Author_Institution

Coll. of Eng., Anna Univ., Chennai

Volume

2

fYear

2000

fDate

2000

Firstpage

598

Abstract

This paper presents a new approach to detect, localize and investigate the feasibility of identifying winding insulation failures. The diagnosis is based on the time-frequency analysis of signals recorded during lightning impulse tests. The virtual instrument is implemented with an acquisition board inserted into a PC and with software developed with lab view tools which sample the voltage and current signal and furnish the extent of insulation failure. The acquired signal is decomposed using multiresolution signal decomposition techniques to detect and localize the time instant of occurrence of fault

Keywords

electric breakdown; electrical faults; fault diagnosis; insulation testing; microcomputer applications; power engineering computing; power transformer insulation; power transformer testing; signal processing; transformer windings; virtual instrumentation; PC; acquisition board; insulation failure testing; lightning impulse tests; multiresolution signal decomposition techniques; power transformer fault diagnosis; time-frequency analysis; virtual instrumentation; winding insulation failures identification; Fault detection; Fault diagnosis; Impulse testing; Instruments; Insulation; Lightning; Signal resolution; Software tools; Time frequency analysis; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

TENCON 2000. Proceedings

Conference_Location

Kuala Lumpur

Print_ISBN

0-7803-6355-8

Type

conf

DOI

10.1109/TENCON.2000.888807

Filename

888807