Dr Chandima Ekanayake
Lecturer,
Power and Energy Systems research group,
School of Information Technology and Electrical Engineering,
The University of Queensland,
Brisbane Qld 4072
Australia
Office: Axon Building 47 - 214
Biography
Chandima Ekanayake received
his B.Sc.Eng.(Hons) in 1999 from
University of Peradeniya,
Sri Lanka. He obtained his Tech. Lic. and PhD from
Chalmers University of Technology
Sweden in 2003 and 2006 respectively. From 2006 to June 2008 he was attached to
the department of Electrical and Electronic Engineering,
University of Peradeniya
Sri Lanka as a Senior lecturer. In year 2008 he joined
University of Queensland
as a Post-Doctoral research Fellow to work on an ARC funded project on improving
transformer insulation diagnostics through polarisation measurements. Currently
Chandima is a lecturer in the
School of Information Technology and Electrical Engineering,
the University of Queensland, Brisbane, Australia.
During his PhD studies he was working for a European Union Project called
REDIATOOL where he engaged in research related to Diagnostics of Transformer
Insulation from dielectric response measurements. Also he has carried out
several dielectric response measurements at
Swiss Federal Institute of Technology (ETH),
Switzerland as a part of his research work. From 2001, he has been involving on
condition monitoring of transformers installed at
Ceylon Electricity Board,
Sri Lanka. He was the Chair of
IEEE Sri Lanka Section
in year 2006 and 2007. He is member of
IEEE.
His research interests are condition monitoring of power apparatus,
Alternatives for insulating oil, performance studies of HV insulators and energy
related studies.
Current Research Activities
1. Improving
the reliability of polarisation based insulation diagnostic methods for
transformers
2. Developing
health index for transformer oil
3. Improving
Frequency Response Analysis (FRA) interpretation on transformers
4. Studying
pin corrosion of line insulators
Teaching activities
ELEC 7051 - Transformer Technology Design and Operation
ELEC 4320/7420 - Modern Asset management in Power Systems
ENGG 4801- Engineering Thesis Projects
Thesis Supervision
2009
Accelerated ageing of transformer insulation materials
Accelerated ageing of transformer model under thermal and electrical loading
2010
Accelerated ageing of transformer solid insulation
Investigation of insulator pin corrosion
Preliminary assessment of model transformers for accelerated ageing experiments
2011
Partial Discharge Analysis of Electrical Insulation
Frequency Response Analysis of Transformers
Investigating pin corrosion of insulators
Analysis of transformer insulation under accelerated ageing
Assessing the life of distribution composite insulators
Journal Publications
Amrulloh Yusuf; Abeyratne, Udantha; and Ekanayake, Chandima, "Gas and Optical
Sensing Technology for the Field Assessment of Transformer Oil," International
Journal of Emerging Electric Power Systems, Berkeley Electronic Press, USA, Vol.
11(4), Article 7. ?DOI: 10.2202/1553-779X.2493, 21 pages (2010).
G.A. Jayantha, M.A.R.M. Fernando, and C.M.B. Ekanayake, “Evaluation of the
Condition of Ground wall Insulation of Generator Stator Winding Using DC Ramp
Test -Experience on CEB Hydro-generators”, Trans. of Institution of Engineers
(SL), Vol. 1, pp. 27-36, 2009.
C. Ekanayake, S.M. Gubanski, A. Graczkowski and K. Walczak, “Frequency response
of oil impregnated pressboard and paper samples for estimating moisture in
transformer insulation”, IEEE Transactions on Power Delivery, Volume 21,
Issue 3, Page(s):1309 - 1317, July 2006.
J. Blennow, C. Ekanayake, K. Walczak, B. Garcia and S.M. Gubanski, “Field
experiences with measurements of dielectric response in frequency domain for
power transformer diagnostics”, IEEE Transactions on Power Delivery, Volume 21,
Issue 2, April 2006
Page(s):681 – 688.
N. Abeywickrama, C. Ekanayake, Y. Serdyuk, Stanislaw M. Gubanski “Effects of the
Insulation Quality on the Frequency Response of Power Transformers” KIEE
International Transactions on Electro-physics and Applications (EA), Vol. 1,
No.1, pp. 123-132, 2006.
C. Ekanayake, S.M. Gubanski and M.A.R.M. Fernando, “Application of Dielectric
Response Measurements for Estimating Moisture Content in Power Transformers”,
KIEE International Transactions on Electro-physics and Applications (EA), Vol.
4-C, No.3, pp. 81-90, 2004.
Conference Publications
Raj B. Jadav, Chandima Ekanayake, Tapan K. Saha
“Understanding Moisture Diffusion Process in Oil-Impregnated Pressboard
Insulation of Transformers“ IEEE PES general meeting 2011
Hui Ma, Tapan K. Saha and Chandima Ekanayake “Predictive Learning and
Information Fusion for Condition Assessment of Power Transformer” IEEE PES GM
2011
Chandima Ekanayake, Hui Ma, Tapan Saha “Past Experience and Future Developments
toward the Safeguarding of Power Transformers” 6th International Conference on
Electrical and Computer Engineering, Dhaka, Bangladesh, 18-20 December, 2010.
Raj B. Jadav, Chandima Ekanayake, Tapan K. Saha “Dielectric Response of
Transformer Insulation – Comparison of Time Domain and Frequency Domain
Measurements” The 9th International Power and Energy Conference (IPEC 2010),
Singapore, 27-29 October 2010.
C. Ekanayake, T. K. Saha, H. Ma and D. Allan, “Application of Polarization Based
Measurement Techniques for Diagnosis of Field Transformers” accepted for IEEE
Power & Energy Society General Meeting, Minneapolis, Minnesota, USA, 25-29 July
2010
Hui Ma, Tapan K. Saha and Chandima Ekanayake “Power Transformer Insulation
Diagnosis under Measurement Originated Uncertainties” accepted for IEEE Power &
Energy Society General Meeting, Minneapolis, Minnesota, USA, 25-29 July 2010
G.A. Jayantha, M.A.R.M. Fernando, C.M.B. Ekanayake, "Monitoring of moisture on
stator winding insulation during drying process," International Conference on
Industrial and Information Systems (ICIIS), Sri Lanka, pp.483-488, 28-31 Dec.
2009.
Hui Ma, Tapan K. Saha, Andrew Thomas, Chandima Ekanayake “Intelligent Framework
and Techniques for Power Transformer Insulation Diagnosis” IEEE Power & Energy
Society General Meeting, Calgary, Canada, July 26-30, 2009
S.Ranawana, C.M.B.Ekanayaka, N.A.S.A.Kurera, M.A.R.M.Fernando, K.A.R. Perera,
“Analysis of Insulation Characteristics of Coconut Oil as an Alternative to the
Liquid Insulation of Power Transformers” in Proc. Third International Conference
on Industrial and Information Systems, Paper ID 532, Kharagpur, India, December
2008
Jörgen Blennow, Aleksander Bartnicki, Andreas Dernfalk , Chandima Ekanayake,
Stanislaw M. Gubanski “Dielectric Spectroscopy Measurements on Power
Transformers- Field Experiences” in Proc. International Conference on Condition
Monitoring and Diagnosis, Changwon, Korea, April 2-5, 2006.
N. Abeywickrama, C. Ekanayake, Stanislaw M. Gubanski “Effects of the Insulation
Quality on the Frequency Response of Power Transformers” in Proc. International
Conference on Condition Monitoring and Diagnosis, Changwon, Korea, April 2-5,
2006.
C. Ekanayake “Diagnosis of Moisture in Transformer Insulation – An application
of frequency response measurements”, PhD. Dissertation, Chalmers University of
Technology, January 2006.
J.
Blennow, A. Dernfalk, K. Walczak, C. Ekanayake, P. Koestinger, L. Karlsson, U.
Gäfvert, S.M Gubanski and A. Bartnicki, “Sequential comparative study of
dielectric response and analyses of oil and paper from a power transformer
undergoing repair”, in Proc. 14th International Symposium on High Voltage
Engineering, pp. 505, Beijing, China, August 2005.
J. Gielniak, C. Ekanayake, K. Walczak, A. Graczkowski and S.M Gubanski,
“Dielectric responses of new and aged transformer pressboard in dry and wet
states”, in Proc. 2005 International Symposium on Electrical Insulating
Materials, pp. 386 – 389, Kitakyushu, Japan, June 2005.
K.G.N.B. Abeywickrama, M.A.R.M. Fernando, S.M. Gunbanski, C.M.B. Ekanayake and
J.A.S.B. Jayasinghe “A Study of Power Frequency Magnetic Field (PFMF)
Distribution at Kirbathkumbura Grid Sub-Station”, Trans. on IEE-Sri Lanka, Vol.
6, No. 1, pp. 17-21, August 2005.
J. Blennow, C. Ekanayake, A. Bartnicki and S.M. Gubanski, “Experiences from
on-site dielectric spectroscopy measurements on power transformers" in Proc.
Advance in Processing, Testing and Application of Dielectric Materials (APTADM
2004), pp. 62-69, Wroclaw, Poland, September 2004.
C.M.B. Ekanayake and M.A.R.M. Fernando “Reliability of a Simplified Insulation
Made for Estimating Moisture Content in Power Transformers”, 11th Annual
Conference of the IEE of Sri Lanka, Colombo Sri Lanka, September 2004.
C. Ekanayake, A. Graczkowski, K. Walczak and S.M. Gubanski, “Dielectric
spectroscopy measurements on oil impregnated paper/pressboard samples” in Proc.
Advance in Processing, Testing and Application of Dielectric Materials (APTADM
2004), pp. 113-120, Wroclaw, Poland, September 2004.
C. Ekanayake, S.M. Gubanski, W. Hribernik and M. Fernando, “Calibrating the
results of dielectric measurements on field aged power transformers using oil
analyses and similar measurements on well-defined pressboard samples”, in Proc.
Nordic Insulation Symposium 2003 (NORD-IS 03), pp. 293-300, Tampere, Finland,
June 2003.
C. Ekanayake and S.M. Gubanski “Correlation between results of dielectric
measurements and oil analyses for a power transformer” presented at the
Electrical Insulation Conference and Electrical Manufacturing & Coil Winding
Conference 2002, Cincinnati, USA, October 15-17, 2002.
C.M.B. Ekanayake, M.A.R.M. Fernando, K. Mularachchi, and S.M. Gubanski,
“Diagnostic of Power Transformer Insulation Using Frequency Domain
Spectroscopy”, 9th Annual conference of the IEE of Sri Lanka, Colombo Sri Lanka,
pp. 5, September 2002.
C. Ekanayake, S.M. Gubanski, K.Mularachchi and M.A.R.M. Fernando, “Diagnostic of
power transformers in Sri Lanka: Application of dielectric spectroscopy in
frequency domain” in Proc. Electrical Insulation Conference and Electrical
Manufacturing & Coil Winding Conference, pp. 593-596, Cincinnati, USA, October,
2001.