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 ¦ Tele: +61 7 3346 9180 ¦ Fax: +61 7 3365 4999 ¦ Email: chandima@itee.uq.edu.au

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

J�rgen 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. G�fvert, 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.