Condition monitoring of current transformers using frequency domain dielectric spectroscopy

Author

Aravinda, G.A.T.N. ; Attaragama, D.C. ; Palawatte, I.T. ; Fernando, M.A.R.M. ; Jayantha, G.A. ; Kumara, J.R.S.S.

Author_Institution

Fac. of Eng., Univ. of Peradeniya, Peradeniya, Sri Lanka

fYear

2013

fDate

17-20 Dec. 2013

Firstpage

168

Lastpage

173

Abstract

This paper presents the possibility of using Frequency Domain Dielectric Spectroscopy (FDS) measurement as a condition monitoring tool for Current Transformers (CT). A 132 kV live tank type CT was thermally aged in the laboratory for 840 hours by injecting twice the rated current from the CT´s secondary side. The FDS responses were periodically measured and modeled using dielectric response functions in the frequency domain. In parallel, FDS responses were obtained on nine 132 kV field-aged CTs (live tank and dead tank). The FDS responses were modeled and compared with the laboratory-aged results. It was found that some of the field-aged CTs showed similar FDS responses as laboratory-aged CT sample.

Keywords

condition monitoring; current transformers; FDS responses; condition monitoring; current transformers; dielectric response functions; frequency domain dielectric spectroscopy; secondary side; time 840 hour; voltage 132 kV; Aging; Capacitance; Dielectrics; Frequency measurement; Instruments; Laboratories; Temperature measurement; Condition monitoring; Current Transformer; Frequency Domain Dielectric Spectroscopy (FDS); Thermal aging;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial and Information Systems (ICIIS), 2013 8th IEEE International Conference on

Conference_Location

Peradeniya

Print_ISBN

978-1-4799-0908-7

Type

conf

DOI

10.1109/ICIInfS.2013.6731975

Filename

6731975