• Power Electronic Applications

• Solar Photovoltaic Systems

• Applications of Supercapacitors

• Consumer Electronics

• Automation

• Robotics

• Institute of Electrical and Electronics Engineers (IEEE)

• IEEE Industrial Electronics Society (IES) - Secretary of the IEEE IES chapter in Sri Lanka

• Sri Lanka Association for the Advancement of Science (SLAAS)

• Institute of Physics Sri Lanka (IPSL)

• Wijesooriya, H. E., Seneviratne, J. A., Jayathilaka, K. M. D. C., Fernando, W. T. R. S., Piyumal, P. L. A. K., Ranaweera, A. L. A. K., Kalingamudali, S. R. D., Kumara, L. S. R., Seo, O., Sakata, O., & Wijesundera, R. P. (2025). Cost-Effective Method for Dissolved Oxygen Sensing with Electrodeposited n-Cu2O Thin-Film Semiconductors. Physchem, 5(1), 6. https://doi.org/10.3390/physchem5010006

• Kumara, W. R., Piyumal, P. L. A. K., Ranaweera, A. L. A. K., & Kalingamudali, S. R. D. (2024). Supercapacitor assisted LED (SCALED) lighting system with grid connection. 5th International Conference on Applied and Pure Sciences (ICAPS), 112.

• Premasiri, R. H. M. D., Piyumal, P. L. A. K., Ranaweera, A. L. A. K., & Kalingamudali, S. R. D. (2024). Investigation of MPPT in photovoltaic systems with step-down DC-DC converter and supercapacitor energy storage. 5th International Conference on Applied and Pure Sciences (ICAPS), 117.

• Jayasekara, R. S. N., Ranaweera, A. L. A. K., & Piyumal, P. L. A. K. (2024). Investigation of a multi-hop wireless power transfer based on repeater coils. 5th International Conference on Applied and Pure Sciences (ICAPS), 114.

• Ramesh, J. M. D. A., Gunawardana, K. D. B. H., Piyumal, P. L. A. K., Ranaweera, A. L. A. K., & Kalingamudali, S. R. D. (2024). Enhancing UPS battery life through C-rate control with a supercapacitor-assisted battery management system. 5th International Conference on Applied and Pure Sciences (ICAPS), 200.

• Pitigala, P. A. S. P., Piyumal, P. L. A. K., Ranaweera, A. L. A. K. and Kalingamudali, S. R. D. (2023). Development of an off-grid solar PV system with battery-supercapacitor hybrid energy storage. International Conference on Applied and Pure Sciences (ICAPS), 106.

• Jayasooriya, J. A. T. D., Piyumal, P. L. A. K. and Ranaweera, A. L. A. K. (2023). Optimising energy efficiency in a PV-enabled base transceiver station. International Conference on Applied and Pure Sciences (ICAPS), 104.

• Hemal, S. B. N. H., Dilshan, G. K. D., Karunaratne, M. A. D. D. S., Morawakaarachchi, K. N., Senanayake, S. V., Premasiri, R. H. M. D., Piyumal, P. L. A. K. and Ranaweera, A. L. A. K. (2023). Comparison of different mothods for generating SPWM signal for the development of a pure sine wave inverter. International Conference on Applied and Pure Sciences (ICAPS), 184.

• Pitigala, P. A. S. P., Piyumal, P. L. A. K., Ranaweera, A. L. A. K. and Kalingamudali, S. R. D. (2023). An Analysis of Maximum Power Point Tracking Efficiency of a DC-DC Converter-Based Solar Charge Controller. International Conference on Applied Sciences (ICAPS SUSL), 19.

• Piyumal, P. L. A. K., Ranaweera, A. L. A. K., Kalingamudali, S. R. D. and Kularatna, N. (2023). In book: Supercapacitor-Assisted Converter Techniques for Implementing Highly Efficient and Self-sustained Off-grid Renewable Energy Systems. National Science and Technology Commission of Sri Lanka, Battaramulla, 208-229.

• Piyumal, K. (2022). Development of an Innovative and Enhanced Solar Energy Harnessing Technique using Supercapacitor as an Energy Storage. Dissertation, University of Kelaniya.

• Piyumal, K., Ranaweera, A., Kalingamudali, S., & Kularatna, N. (2021). Supercapacitor Assisted Hybrid PV System for Efficient Solar Energy Harnessing. Electronics 2021, Vol. 10, Page 2422, 10(19), 2422. https://doi.org/10.3390/ELECTRONICS10192422

• Piyumal, P.L.A.K., Ranaweera, A.L.A.K., Kalingamudali, S.R.D., and Kularatna, N. (2022). Maximum Power Point Tracking of an Off-grid Photovoltaic System Consisting of a Series Connected Supercapacitor with a Step-down Converter. ECS Transactions, Vol. 107(1), Page 16233 - 16250. https://doi.org/10.1149/10701.16233ecst.

• Jayasekara, L. D. P. S., Piyumal, P. L. A. K., Ranaweera, A. L. A. K., & Kalingamudali, S. R. D. (2020). Efficiency Optimization of Supercapacitor Assisted Low Dropout (SCALDO) Regulators. IEEE Region 10 Humanitarian Technology Conference, R10-HTC, 2020-Decem. https://doi.org/10.1109/R10-HTC49770.2020.9356952

• Piyumal, P. L. A. K., Ranaweera, A. L. A. K., Kalingamudali, S. R. D., & Kularatna, N. (2020). Analysis of Impedance Matching Technique for Novel Supercapacitor Assisted PV Systems. IECON Proceedings (Industrial Electronics Conference), 2020-Octob(c), 1756–1761. https://doi.org/10.1109/IECON43393.2020.9254315

• Piyumal, P. L. A. K., Ranaweera, A. L. A. K., Kalingamudali, S. R. D., & Kularatna, N. (2019). Improving the energy storage of standalone PV systems while enhancing the charging efficiency using supercapacitors. Proceedings of the IEEE International Conference on Industrial Technology, 2019-February, 486–490. https://doi.org/10.1109/ICIT.2019.8755174

• Piyumal, P. L. A. K., Ranaweera, A. L. A. K., Kalingamudali, S. R. D., & Kularatna, N. (2019). Novel approach for harnessing maximum energy from PV systems using supercapacitors. IEEE Region 10 Humanitarian Technology Conference, R10-HTC, 2018-December. https://doi.org/10.1109/R10-HTC.2018.8629801

• Piyumal, K., Ranaweera, A., Kalingamudali, S., & Kularatna, N. (2021). Maximum Power Point Tracking of a Standalone Photovoltaic System Consisting of a Series Connected Supercapacitor. International Conference on Technologies for Smart Green Connected Society (ICTSGS).

• Rajapaksha, I., Piyumal, K., Seneviratne, J., & Ranaweera, A. (2021). An Eco-friendly smart battery-less Wi-Fi-based environmental condition monitoring system for precision agriculture. International Conference on Technologies for Smart Green Connected Society (ICTSGS).

• De Silva, G.D.K., Piyumal, P.L.A.K., Ranaweera, A.L.A.K., & Kalingamudali, S.R.D. (2020). Supercapacitor assisted wireless chargers for moving electric vehicles. 76th Annual Sessions of Sri Lanka Association for the Advancement of Science (SLAAS), 73.

• Piyumal, P.L.A.K., Ranaweera, A.L.A.K., Kalingamudali, S.R.D., & Kularatna, N. (2019). Novel slow switching technique for efficient solar energy harnessing for off grid photovoltaic systems. 4th International Research Symposium on Pure and Applied Sciences (IRSPAS), 101.

• Piyumal, P.L.A.K., Ranaweera, A.L.A.K., Kalingamudali, S.R.D., & Kularatna, N. (2018). Supercapacitor based novel approach for efficient solar energy harnessing. 3rd International Research Symposium on Pure and Applied Sciences (IRSPAS), 103.

• Piyumal, P.L.A.K., Nagahapitiya, N.W.H.G.B., Jayatissa, N.W.K., & De Silva, D.S.M. (2016). Energy efficient hybrid water heating system. 1st International Research Symposium on Pure and Applied Sciences (IRSPAS), 45.

• Senate Honours for Conducting High Quality Research and Publishing in the year 2022 by the University of Kelaniya, Sri Lanka

• Senate Honours for Conducting High Quality Research and Publishing in the year 2021 by the University of Kelaniya, Sri Lanka

• Senate Honours for Conducting High Quality Research and Publishing in the year 2020 by the University of Kelaniya, Sri Lanka

• Senate Honours for Conducting High Quality Research and Publishing in the year 2019 by the University of Kelaniya, Sri Lanka

• Senate Honours for Conducting High Quality Research and Publishing in the year 2018 by the University of Kelaniya, Sri Lanka

• Second Runner Up of UWU Robot Battles Extra Edition 2019 organized by Department of Science & Technology, Uva Wellassa University, Sri Lanka

• Second Runner Up in Engineering category at INVENTIO 2017, organized by The Faculty of Science, University of Kelaniya in collaboration with Sri Lanka Inventors Commission

• University Colours for performance in Karate 2014, University of Kelaniya, Sri Lanka

• Runner Up of the Innovative Electronics Category in DIGITAL DREAMS 2015 organized by Electronics students’ society, University of Kelaniya, Sri Lanka

• Nominated to the Dean’s List based on outstanding academic performance during the academic year 2013/2014 of Faculty of Science, University of Kelaniya, Sri Lanka

Patents:

i. International Publication under Patent Cooperation Treaty (PCT)

• TN Gurusinghe, LDPS Jayasekara, HE Wijesooriya, RMIU Rajapaksha, PLAK Piyumal, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, (2022). System and method for addressable data communication using Radio Frequency Communication, (WO 2022/189847 A1). World Intellectual Property Organization - https://patentscope.wipo.int/search/en/detail.jsf?docId=WO2022189847&_cid=P20-L8E3Q1-87682-1

ii. Sri Lankan Patents

1. RMIU Rajapaksha, PLAK Piyumal, LDPS Jayasekara, TN Gurusinghe, , HE Wijesooriya, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, (2022). AI-based Smart LP Gas Level Indicator, Sri Lankan Patent No 22121

2. LDPS Jayasekara, HE Wijesooriya, TN Gurusinghe, RMIU Rajapaksha, PLAK Piyumal, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, (2022). Addressable Data Communication System for Industry Automation and Industrial Internet of Things (IIoT) Based on Controller Area Network (CAN) Protocol, Sri Lankan Patent No 22424

3. TN Gurusinghe, LDPS Jayasekara, HE Wijesooriya, RMIU Rajapaksha, PLAK Piyumal, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, (2022). System and method for addressable data communication, processing, control, and visualization based on RF wireless communication with or without an Internet connection, Sri Lankan Patent No 21656. National Intellectual Property Office

4. PLAK Piyumal, ALAK Ranaweera, SRD Kalingamudali and ADVN Kularatna, (2022). Dynamic Power Management Technique for Supercapacitor-Battery Hybrid Photovoltaic Systems, Sri Lankan Patent No 21483. National Intellectual Property Office

iii. Sri Lankan Patents (Pending)

1. RMIU Rajapaksha, MPAV Gunawardhana, PLAK Piyumal, LDPS Jayasekara, TN Gurusinghe, HE Wijesooriya, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, (2022). Neutral Connection-free Liquid-petroleum-gas/propane Sensitive Safety Electrical Switch, Sri Lankan Patent No 22450. National Intellectual Property Office

2. LDPS Jayasekara, TN Gurusinghe, HE Wijesooriya, MPAV Gunawardhana, RMIU Rajapaksha, PLAK Piyumal, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, (2023). Smart Battery-Less Identification Card with Location Tracking and Attendance Monitoring Capabilities, Sri Lankan Patent No 22621. National Intellectual Property Office

3. HE Wijesooriya, LDPS Jayasekara, TN Gurusinghe, RMIU Rajapaksha, MPAV Gunawardhana, PLAK Piyumal, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, (2023). Automated Stand-alone Wireless Water Quality Monitoring and Rainwater Harvesting System, Sri Lankan Patent No 22622. National Intellectual Property Office

Industrial Designs:

1. RMIU Rajapaksha, MPAV Gunawardhana, HE Wijesooriya, LDPS Jayasekara, TN Gurusinghe, PLAK Piyumal, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, (2023). Safety Electrical Switch, Sri Lankan Industrial Design No 13787

2. HE Wijesooriya, RMIU Rajapaksha, LDPS Jayasekara, TN Gurusinghe, MPAV Gunawardhana, PLAK Piyumal, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali Internet Independent Wireless Real-Time Water Quality Monitoring Unit, Sri Lankan Industrial Design No 13786

3. RMIU Rajapaksha, PLAK Piyumal, HE Wijesooriya, LDPS Jayasekara, TN Gurusinghe, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, (2022). Emergency Shut Off Liquid Petroleum Gas Regulator for Domestic Use, Sri Lankan Industrial Design No 13613

4. RMIU Rajapaksha, PLAK Piyumal, HE Wijesooriya, LDPS Jayasekara, TN Gurusinghe, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, (2022). Smart Liquid Petroleum Gas Level Indicator, Sri Lankan Industrial Design No 13554

Industrial Designs (Pending):

1. RMIU Rajapaksha, MPAV Gunawardhana, HE Wijesooriya, LDPS Jayasekara, TN Gurusinghe, PLAK Piyumal, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, (2022). Digital Irrigation Control Unit, Sri Lankan Industrial Design No 13741

2. TN Gurusinghe, RMIU Rajapaksha, HE Wijesooriya, LDPS Jayasekara, MPAV Gunawardhana, PLAK Piyumal, JA Seneviratne, ALAK Ranaweera, KMDC Jayathilaka, LBDRP Wijesundera and SRD Kalingamudali, (2023). Individually Controllable Parametric Speaker Array, Sri Lankan Industrial Design No 13785

Commercialised innovations:

1. The innovation Remotely Controllable Regulator Connected in Series with Resistive and Inductive Loads has been commercialised with Orel Corporation (Private) Limited, and the product launch was held on April 2023

2. In addition, Patent numbers 20365, 21656, 22121, 22424, and 22450 are already being commercialised with 8 License agreements and waiting for the product launches