Sarath Kumara

Publications (30)
Projects (1)

Showing 30 publications

2024

Polymer composition for wire and cable applications with advantageous electrical properties

Amir Masoud Pourrahimi, Per Ola Hagstrand, Thomas Gkourmpis et al

Patent

2022

DC Electrical Trees in Polymer Insulation Inflicted by Rapidly Decreasing Short Circuit Voltage Flanks

Thomas Hammarström, Sarath Kumara, Xiangdong Xu et al

ICD 2022 - IEEE 2022 4th International Conference on Dielectrics, Proceedings, p. 154-157

Paper in proceeding

Show project

2022

Invariant electrical conductivity upon thermal ageing of a crosslinked copolymer blend for high voltage insulation

Sarath Kumara, Amir Masoud Pourrahimi, Azadeh Soroudi et al

Materials Advances. Vol. 3 (11), p. 4718-4723

Journal article

2022

Impact of Temperature on Internal Resistance of Metallized Film Capacitors

Avnish Kumar Upadhyay, Sarath Kumara, Yuriy Serdyuk

ICD 2022 - IEEE 2022 4th International Conference on Dielectrics, Proceedings, p. 421-424

Paper in proceeding

2022

Effect of Humidity on Charge Accumulation on Polymer-Air Interfaces under DC Stress

Daniel Svensson, Sarath Kumara, Olof Hjortstam et al

ICD 2022 - IEEE 2022 4th International Conference on Dielectrics, Proceedings, p. 498-501

Paper in proceeding

2021

Calculation of Electric Fields in HVDC Cables: Comparison of Different Models

Sarath Kumara, Yuriy Serdyuk, Marc Jeroense

IEEE Transactions on Dielectrics and Electrical Insulation. Vol. 28 (3), p. 1070-1078

Journal article

2021

Frequency Domain Measurements for Diagnosis of Power Transformers: Experiences from Australia, Malaysia, Sri Lanka and UK

Sarath Kumara, Shanika Matharage, Chandima Ekanayake et al

CIGRE Science and Engineering. Vol. 2021 (22), p. 1-26

Journal article

2021

Repurposing Poly(3-hexylthiophene) as a Conductivity-Reducing Additive for Polyethylene-Based High-Voltage Insulation

Amir Masoud Pourrahimi, Sarath Kumara, Fabrizio Palmieri et al

Advanced Materials. Vol. 33 (27)

Journal article

2021

Polarity Effect on Electric Tree Inception in HVDC Cable Insulation

Sarath Kumara, Thomas Hammarström, Yuriy Serdyuk

IEEE Transactions on Dielectrics and Electrical Insulation. Vol. 28 (5), p. 1819-1827

Journal article

2021

DC Electrical Trees in XLPE Induced by Short Circuits

Sarath Kumara, Thomas Hammarström, Xiangdong Xu et al

Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP. Vol. 2021-December, p. 275-278

Paper in proceeding

2020

Electrical Characterization of a New Crosslinked Copolymer Blend for DC Cable Insulation

Sarath Kumara, Xiangdong Xu, Thomas Hammarström et al

Energies. Vol. 13 (6)

Journal article

Show project

2020

Click chemistry-type crosslinking of a low-conductivity polyethylene copolymer ternary blend for power cable insulation

Massimiliano Mauri, Anna Hofmann, Diana Gomez-Heincke et al

Polymer International. Vol. 69 (4), p. 404-412

Journal article

2020

Comparison of Different Methods for Characterization of DC Conductivity of Insulating Polymers

Sarath Kumara, Xiangdong Xu, Thomas Hammarström et al

Proceedings of the 2020 IEEE 3rd International Conference on Dielectrics, ICD 2020, p. 435-438

Paper in proceeding

Show project

2016

Surface Potential Decay on LDPE and LDPE/Al2O3 Nano-Composites: Measurements and Modeling

Sarath Kumara, Yuriy Serdyuk, Stanislaw Gubanski

IEEE Transactions on Dielectrics and Electrical Insulation. Vol. 23 (6), p. 3466-3475

Journal article

2015

Modifications of dielectric properties of polyamides induced by long-term exposure to corona

Yuesheng Zheng, Sarath Kumara, Yuriy Serdyuk et al

Proceedings of the 11th IEEE International Conference on the Properties and Applications of Dielectric Materials, ICPADM 2015, Sydney, Australia, 19-22 July 2015. Vol. 2015-October, p. 708-711

Paper in proceeding

2013

Impulse testing of hybrid gas-solid polymer insulation systems

Sarath Kumara, Yuesheng Zheng, Yuriy Serdyuk et al

Proceedings of 18th International Symposium on High Voltage Engineering, Aug. 25-30, 2013, Seoul, Korea, p. 509-514

Paper in proceeding

2013

Performance of a hybrid insulation system

Yuesheng Zheng, Sarath Kumara, Yuriy Serdyuk et al

Report

2013

Application of streamer criteria for calculations of flashover voltages of gaseous insulation with solid dielectric barrier

Manjunath Ramesh, Raimund Summer, Shailendra Singh et al

Proceedings of 18th International Symposium on High Voltage Engineeirng, Aug. 25-30, 2013, Seoul, Korea, p. 1258-1263

Paper in proceeding

2012

DC Flashover Characteristics of a Polymeric Insulator in Presence of Surface Charges

Sarath Kumara, Shahid Alam, Imtiaz Rifanul Hoque et al

IEEE Transactions on Dielectrics and Electrical Insulation. Vol. 19 (3), p. 1084-1090

Journal article

2012

Surface charge decay on HTV silicone rubber: effect of material treatment by corona discharges

Sarath Kumara, Bin Ma, Yuriy Serdyuk et al

IEEE Transactions on Dielectrics and Electrical Insulation. Vol. 19 (6), p. 2189-2195

Journal article

2012

Electrical Charges on Polymeric Insulator Surfaces and their Impact on Flashover Performance

Sarath Kumara

Doctoral thesis

2012

Surface Charges on Cylindrical Polymeric Insulators

Sarath Kumara, Imtiaz Rifanul Hoque, Shahid Alam et al

IEEE Transactions on Dielectrics and Electrical Insulation. Vol. 19 (3), p. 1076-1083

Journal article

2011

Surface Charge Decay of Corona Charged HTV Silicone Rubber Samples due to Bulk Conduction

Sarath Kumara, Yuriy Serdyuk, Stanislaw Gubanski

22nd Nordic Insulation Symposium (NORDIS 11), June 13-15, Tampere, Finland, p. 75-78

Paper in proceeding

2011

Surface Charge Decay on Polymeric Materials under Different Neutralization Modes in Air

Sarath Kumara, Yuriy Serdyuk, Stanislaw Gubanski

IEEE Transactions on Dielectrics and Electrical Insulation. Vol. 18 (5), p. 1779-1788

Journal article

2010

Simulation of Surface Charge Effect on Impulse Flashover Characteristics of Outdoor Polymeric Insulators

Sarath Kumara, Yuriy Serdyuk, Stanislaw Gubanski

IEEE Transactions on Dielectrics and Electrical Insulation. Vol. 17 (6), p. 1754-1763

Journal article

2009

Measurement and Simulation of Positive Impulse Corona Current

Sarath Kumara, Yuriy Serdyuk, Stanislaw Gubanski

21st Nordic Insulation Symposium (NORDIS 09) , June 15-17, Gothenburg, Sweden., p. 117-120

Paper in proceeding

2009

Electrical Charges on Polymeric Insulator Surfaces and their Impact on Withstand Performance

Sarath Kumara

Licentiate thesis

2009

Calculation of Corona Voltage-Current Characteristics in Air

Sarath Kumara, Yuriy Serdyuk, Stanislaw Gubanski

4th International Conference on Industrial and Information Systems 2009, ICIIS 2009; Peradeniya; Sri Lanka; 28 December 2009 through 31 December 2009, p. 489-492

Paper in proceeding

2009

Charging of Polymeric Surfaces by Positive Impulse Corona

Sarath Kumara, Yuriy Serdyuk, Stanislaw Gubanski

IEEE Transactions on Dielectrics and Electrical Insulation. Vol. 16 (3), p. 726-733

Journal article

2009

Surface Charge Relaxation in Silicone Rubber and EPDM

Sarath Kumara, Yuriy Serdyuk, Stanislaw Gubanski

2009 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, p. 2B-16

Paper in proceeding

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Showing 1 research projects

2020–

Activities within materials and diagnostics for high-voltage networks

Yuriy Serdyuk Power grids and Components

Thomas Hammarström Power grids and Components

Sarath Kumara Power grids and Components

Chalmers

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