Title :
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
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;
Conference_Titel :
Industrial and Information Systems (ICIIS), 2013 8th IEEE International Conference on
Conference_Location :
Peradeniya
Print_ISBN :
978-1-4799-0908-7
DOI :
10.1109/ICIInfS.2013.6731975
