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Publications

Recent Publications

Journals



  1. Sethupathy S, Udaya Kumar & Sujatha B, "On Overcoming the Transverse Boundary Error of the SU/PG Scheme for Moving Conductor Problems" IEEE Transactions on Magnetics, Digital Object Identifier: 10.1109/TMAG.2021.3123748

  2. Rupam pal, Udaya Kumar, "Modeling of return stroke current evolution over a realistic ground", IEEE Transactions on Electromagnetic Compatibility, Digital Object Identifier: 10.1109/TEMC.2021.3066839

  3. Ashiq M, Satish L & Udaya K, "Elegant procedure to estimate series capacitance of a uniform transformer winding from its measured FRA: implementable on existing FRA instruments" IET High Voltage, doi: 10.1049/hve.2019.0251

  4. Debasish Nath, Udaya Kumar, "Total Electric Field due to an Isolated Electron Avalanche" IEEE Transactions on Dielectrics and Electrical Insulation, Vol. 23, Issue 5,, October 2016, pp. 2562-2571.

  5. Sethupathy and Udaya Kumar, " Stable Galerkin finite-element scheme for the simulation of problems involving conductors moving rectilinearly in magnetic fields ",IET Science, Measurement and Technology, Volume 10, Issue 8, 2016 , p. 952 - 962

  6. Sethupathy and Udaya Kumar, "Augmenting Numerical Stability of the Galerkin Finite Element Formulation for Electromagnetic Flowmeter Analysis", IET Science, Measurement and Technology, Volume 10, Issue 4, 2016, p. 288 - 295

  7. Udaya Kumar, "Role of upward leaders in modifying the induced currents in solitary down-conductors during a nearby lightning strike to ground ", Journal of Atmospheric and Solar-Terrestrial Physics, Elsevier, Vol 134, pp 30 - 40, 2015.

  8. Udaya Kumar, Rupam Pal and Paramesha K, "Evaluation of the grounding resistance of conductors buried in step-like terrain", Accepted for publication in IEEE Trans on Industrial Applications, December 2015 Issue.

  9. Vernon Cooray, Udaya Kumar, Farhad Rachidi and Carlo Alberto Nucci, "On the possible variation of the lightning striking distance as assumedin the IEC lightning protection standard as a function of structure height", Electric Power Systems Research, Vol. 113, 2014, pp. 79-87

  10. Udaya Kumar and Rosy Balaram Raysaha, "Genesis of Return Stroke Current Evolution at the Wavefront", Journal of Atmospheric Research, Vol. 129-130, 2013, pp. 42- 48.

  11. Rosy Balaram Raysaha, Udaya Kumar and Vernon Cooray, "Analysis for the reflected waves transmitted on to the channel by tall grounded objects using a special case,IEEE Trans. on Electromagnetic Compatibility, Vol. 54, No. 2, April 2012, pp. 262 - 271

  12. Rosy Balaram Raysaha and Udaya Kumar, "Investigation on the Sources of Reflection at the Junction of Tall Grounded Object and Lightning Channel", IEEE Trans. on Electromagnetic Compatibilit, Vol. 53, No. 3, August 2011, pp. 764-772.

  13. Rosy Balaram Raysaha and Udaya Kumar, "Dynamics for the secondary current pulses at the main wavefront", Journal of Lightning Research, Vol. 3, 2011, pp. 10-17.

  14. Vishwanath Hegde, Govind R. Kunkolienker & Udaya Kumar, "Numerical Electromagnetic Analysis of Current and Voltage Distribution along down Conductors and Towers Hit by Direct Lightning", Electric Power Components and Systems, Vol. 39, pp. 225-236, 2011.

  15. Rosy Balaram Raysaha, Udaya Kumar and Rajeev Thottappillil, "A Macroscopic Model for First Return Stroke of Lightning", IEEE Trans. on Electromagnetic Compatibility, Vol. 53, No. 3, August 2011, pp. 782-791

  16. Subba Reddy B and Udaya Kumar, "Simulation of Potential and Electric Field Profiles for transmission line Insulators", International Journal of Modeling and Simulation, ACTA Press, Calgary, Canada, Vol. 30, Issue 5, December 2010.

  17. Subba Reddy B and Udaya Kumar, "Enhancement of Surface Flashover Performance of High Voltage Ceramic Disc Insulators",Journal of Materials Engineering and Performance, ASM International, Springer publications, USA, Volume 19 Number 4, 2010.

  18. Subba Reddy B and Udaya Kumar, "A Unique Artificial Pollution Laboratory at IISc", Journal of Instrument Society of India. Vol. 40, No.1 pp 47-49, March 2010.

  19. Subba Reddy B and Udaya Kumar, "Radio Interference Measurements on a Ceramic disc Insulator String with Field Reduction Electrode",Journal of Instrumentation, IOP Science publication, Vol. 5, 2010.

  20. Subba Reddy B and Udaya Kumar, "Modeling and Simulation of surface and volume stress for High voltage Porcelain insulators", International Journal of Computers & Applications, ACTA press, Canada

  21. Udaya Kumar, "Investigation on the Potential rise and Currents in Insulated Mast Scheme with Single Tower During Stroke Interception", Journal of Lightning Research, 2010.

  22. Vishwanath Hegde and Udaya Kumar, "Studies on characteristics of lightning generated currents in an interconnected lightning protection system", Journal of Electrostatics, Vol.67, 2009, pp. 590-596.

  23. Lucian Dascalescu, Subhankar Das and Udaya Kumar, "Numerical Simulation of conductive particle behaviour at the surface of a plate electrode affected by a DC corona field", Journal of Electrostatics, vol. 67, 2009, pp. 167-172

    24. Book Chapter/Section


    1. Udaya Kumar, Appendix D: "Launch Pad Lightning Protection" in the book Safety Design of Space Operation, Edited by F.A. Allahdadi, I. Rongier & P.D. Wilde with Editor-in-chief T. Sgobba, published by Elsevier for International Association for Advancement of Space Safety, 2013.

    2. Udaya Kumar Chapter 16: "Lightning Protection of Satellite Launch Pads" in the IEE book on Lightning Protection, Edited by Prof. Vernon Cooray, 2010.

    3. Contributed to TB of CIGRE WG 4.26 & 4.27

    Conferences


    1. Santosh J and Udaya Kumar, " Preliminary Investigations on Propagation of Partial Discharge Induced Currents in a Transformer Winding", 2015 International Conference on Condition Assessment Techniques in Electrical Systems (CATCON), Ropar, Nov. 2017.

    2. Rupam Pal and Udaya Kumar, "Issues Related with use of FDTD in Return-stroke Modeling", AsiaEM Symposium Bangalore, July 2017.

    3. Santosh J and Udaya Kumar, " Limit for the Circuit Model for Rogowski Coil",AsiaEM Symposium Bangalore, July 2017.

    4. Udaya Kumar and Vernon Cooray, "Limitations of RSM in Zoning of Aircrafts", 10th Asia Pacific Lightning Conference, Krabi, Thailand, May 2017

    5. Udaya Kumar and Rupam Pal, "The details of electric field in the close range for a first return stroke", 10th Asia Pacific Lightning Conference, Krabi, Thailand, May 2017

    6. Udaya Kumar and Debasish Nath, "Measurement of electron avalanche current in a point-plane geometry stressed with negative voltage", 2015 International Conference on Condition Assessment Techniques in Electrical Systems (CATCON), December, 2015.

    7. Udaya Kumar and Sukesh A, "Simulation for Strike to Conductor with a Simplified Line Model", Asia-Pacific International Lightning Conference, (APL) 2015, Nagoya, Japan, 22 - 26th June, 2015, Paper No. TC5.1-5.

    8. Udaya Kumar and Sreeram V, "Modelling Proximity Effects in Transverse Magnetic Mode for Lightning Studies", International Conference On Lightning Protection (ICLP) 2014, Shanghai, Chain, Oct 12-18, 2014, Paper No. 474.

    9. Udaya Kumar and Sruthi Ajay, "Lightning Induced Currents in Isolated Towers", International Conference On Lightning Protection (ICLP) 2014, Shanghai, Chaina, Oct 12-18, 2014, Paper No. 450.

    10. Udaya Kumar and Govinda Rao K., "Estimation of electrical stress in insulated down conductors and cables", Asia-Pacific International Lightning Conference, Seoul, Korea, June 26-28, 2013.

    11. Udaya Kumar and Debasish Nath, "Dimensioning of Corona Control Rings for High Voltage Lines and Substations", International Colloquium on Ultra High Voltage to be jointly conducted by CBIP and CIGRE, Delhi, 3-4th April 2013.

    12. Udaya Kumar and Rosy Balaram Raysaha, "Genesis of Return Stroke Current Evolution at the Wavefront",Asia-pacific lightning conference (APL2011), Chengdu, China, 1-4, November 2011, TC2-73-1.

    13. Vinoda Shivananda, Vishwanath Hegde & Udaya Kumar, "Effect of nearby conducting objects on the induced currents in simple down conductors due to an indirect lightning",Centenary conference of electrical engineering, IISc, 15-17, December, 2011.

    14. Rosy Balaram Raysaha and Udaya Kumar, "An Inquisitive Analysis on the Temporal Variation of Return Stroke Current Essential for Producing Observed Remote Electro-Magnetic Fields",Centenary conference of electrical engineering, IISc, 15-17, December, 2011..

    15. Udaya Kumar and KK Rajan, "A Finite Element Method Based Approach for Evaluating the Sensitivity of Faraday-Type Electromagnetic Flow Meter for Liquid Sodium Flow", Centenary conference of electrical engineering, IISc, 15-17, December, 2011.

      16.

    Patents filed

    1. Subba Reddy B and Udaya Kumar, "An Insulator Comprising Field Reduction Electrodes to Improve Pollution Flashover Strength and Methods thereof", Indian Patent Application No.: 923/CHE/2009, filing date: 21st April 2009, Indian Institute of Science IP Cell Reference No: ES-EE-2009-029.

    Paper under review

    List of publications:


    Published in Journals


    1. Sethupathy S, Udaya Kumar & Sujatha B, "On Overcoming the Transverse Boundary Error of the SU/PG Scheme for Moving Conductor Problems" IEEE Transactions on Magnetics, Digital Object Identifier: 10.1109/TMAG.2021.3123748

    2. Rupam pal, Udaya Kumar, "Modeling of return stroke current evolution over a realistic ground", IEEE Transactions on Electromagnetic Compatibility, Digital Object Identifier: 10.1109/TEMC.2021.3066839

    3. Ashiq M, Satish L & Udaya K, "Elegant procedure to estimate series capacitance of a uniform transformer winding from its measured FRA: implementable on existing FRA instruments" IET High Voltage, doi: 10.1049/hve.2019.0251

    4. Potapenko A.N., Kumar U., Shtifanov A.I., "About the Method for Estimation of Circuit Solutions for Distributed Lightning Protection of High-Energy Objects", Journal of University of Belgorod, October 2017. .

    5. Shtifanov A.I., Potapenko A.N., Kumar U., Toushkin A.G. Application of the Method for Estimation of Circuit Solutions for Lightning Protection with Lightning Receivers "Metal-Insulator-Metal", Journal of University of Belgorod, November 2017. .

    6. Debasish Nath, Udaya Kumar, "Total Electric Field due to an Isolated Electron Avalanche" IEEE Transactions on Dielectrics and Electrical Insulation, Vol. 23, Issue 5,, October 2016, pp. 2562-2571.

    7. Sethupathy and Udaya Kumar, " Stable Galerkin finite-element scheme for the simulation of problems involving conductors moving rectilinearly in magnetic fields ", Accepted for publication in IET Science, Measurement and Technology.

    8. Sethupathy and Udaya Kumar, " Stable Galerkin finite-element scheme for the simulation of problems involving conductors moving rectilinearly in magnetic fields ", Accepted for publication in IET Science, Measurement and Technology.

    9. Shtifanov A.I., Potapenko A.N., Potapenko T.A., Kumar U., "Computational Experiments with the Ability to Determine the General Features of the Composite Lightning Air Terminal", Fundamental Research, No. 11, Issue 6, 2015, pp. 1137 - 1144.

    10. Potapenko A.N., Kumar U., Potapenko T.A., Shtifanov A.I., The Research of Distributed Lightning Protection of the Space-Launch Comples on the Basis of Simulation Experiment", Fundamental Research, No. 11, Issue 4, 2015, pp. 727 - 734.

    11. Sethupathy and Udaya Kumar, "Augmenting Numerical Stability of the Galerkin Finite Element Formulation for Electromagnetic Flowmeter Analysis", Accepted for publication in IET Science, Measurement and Technology.

    12. Udaya Kumar, "Role of upward leaders in modifying the induced currents in solitary down-conductors during a nearby lightning strike to ground ", Journal of Atmospheric and Solar-Terrestrial Physics, Elsevier, Vol 134, pp 30 - 40, 2015.

    13. Udaya Kumar, Rupam Pal and Paramesha K, "Evaluation of the grounding resistance of conductors buried in step-like terrain", Accepted for publication in IEEE Trans on Industrial Applications, December 2015 Issue.

    14. Vernon Cooray, Udaya Kumar, Farhad Rachidi and Carlo Alberto Nucci, "On the possible variation of the lightning striking distance as assumedin the IEC lightning protection standard as a function of structure height", Electric Power Systems Research, Vol. 113, 2014, pp. 79-87

    15. Udaya Kumar and Rosy Balaram Raysaha, "Genesis of Return Stroke Current Evolution at the Wavefront", Journal of Atmospheric Research, Vol. 129-130, 2013, pp. 42- 48.

    16. Rosy Balaram Raysaha, Udaya Kumar and Vernon Cooray, "Analysis for the reflected waves transmitted on to the channel by tall grounded objects using a special case",IEEE Trans. on Electromagnetic Compatibility, Vol. 54, No. 2, April 2012, pp. 262 - 271

    17. Rosy Balaram Raysaha and Udaya Kumar, "Investigation on the Sources of Reflection at the Junction of Tall Grounded Object and Lightning Channel", IEEE Trans. on Electromagnetic Compatibility, Vol. 53, No. 3, August 2011, pp. 764-772.

    18. Rosy Balaram Raysaha and Udaya Kumar, "Dynamics for the secondary current pulses at the main wavefront", Journal of Lightning Research, Vol. 3, 2011, pp. 10-17.

    19. Vishwanath Hegde, Govind R. Kunkolienker & Udaya Kumar, "Numerical Electromagnetic Analysis of Current and Voltage Distribution along down Conductors and Towers Hit by Direct Lightning", Electric Power Components and Systems, Vol. 39, pp. 225-236, 2011.

    20. Rosy Balaram Raysaha, Udaya Kumar and Rajeev Thottappillil, "A Macroscopic Model for First Return Stroke of Lightning", IEEE Trans. on Electromagnetic Compatibility, Vol. 53, No. 3, August 2011, pp. 782-791

    21. Subba Reddy B and Udaya Kumar, "Simulation of Potential and Electric Field Profiles for transmission line Insulators", International Journal of Modeling and Simulation, ACTA Press, Canada, Vol. 30, Issue 5, December 2010.

    22. Subba Reddy B and Udaya Kumar, "Enhancement of Surface Flashover Performance of High Voltage Ceramic Disc Insulators", Journal of Materials Engineering and Performance, ASM International, Springer publications, USA, Volume 19, No. 4, 2010

    23. Subba Reddy B and Udaya Kumar, "A Unique Artificial Pollution Laboratory at IISc", Journal of Instrument Society of India, Vol. 40, No.1 pp 47-49, March 2010.

    24. Subba Reddy B and Udaya Kumar, "Modeling and Fabrication of a Portable Surge Generator", Journal of Instrument society of India, Vol. 40 No.2, pp 111-114, June 2010.

    25. Subba Reddy B and Udaya Kumar, "Radio Interference Measurements on a Ceramic disc Insulator String with Field Reduction Electrode", Journal of Instrumentation, IOP Science publication, Vol. 5, 2010.

    26. Subba Reddy B and Udaya Kumar, "Modeling and Simulation of surface and volume stress for High voltage Porcelain insulators", International Journal of Computers & Applications, ACTA press, Canada.

    27. Subba Reddy B and Udaya Kumar, "A Hybrid Impulse Generator", Journal of Instrument Society of India, Vol.41, No 3, Sept 2011, pp. 155-157.

    28. Udaya Kumar, "Investigation on the Potential rise and Currents in Insulated Mast Scheme with Single Tower During Stroke Interception", Journal of Lightning Research, 2009.

    29. Vishwanath Hegde and Udaya Kumar, "Studies on characteristics of lightning generated currents in an interconnected lightning protection system", Journal of Electrostatics, Vol. 67, 2009, pp. 590-596.

    30. Lucian Dascalescu, Subhankar Das and Udaya Kumar, "Numerical Simulation of conductive particle behaviour at the surface of a plate electrode affected by a DC corona field,Journal of Electrostatics", Vol. 67, 2009, pp. 167-172.

    31. Udaya Kumar, Rosy Balaram Raysaha and Dileep Kumar K.P., "Time Domain Modelling of First Return Stroke of Lightning", The Open Atmospheric Science Journal, 2008, 2, 261-270.

    32. Udaya Kumar, Vishwanath Hedge and Pranavkumar Darji, "Investigations on the Voltages and Currents in the Lightning Protection System of the Indian Satellite Launch Pad-I During a Stroke Interception"", IET Science Measurement and Technology, Vol.1, No. 5, 2007, pp.225 231.

    33. Udaya Kumar, Vishwanath Hegde, and Vinoda Shivanand, "Preliminary Studies on the Characteristics of the Induced Currents in Simple Down Conductors Due to a Nearby Lightning Strike", IEEE Tran. Electromagentic Compability, Vol. 48, No. 4, Nov. 2006, pp. 805 -816.

    34. Udaya Kumar & Paresh Kumar Nayak, "Investigations on the Post-Stroke Voltages and Currents in Lightning Protection Schemes Involving Single Tower", IEEE Transaction on EMC, Volume 47, No. 3, pp. 543 - 551, August 2005.

    35. Udaya Kumar, Prasanth Kumar B & Jagannath Padhi, "A Macroscopic Inception Criterion for the Upward Leaders of natural Lightning", IEEE - Transaction on Power Delivery, Volume 20, No 2, pp. 904 - 911, April 2005.

    36. Udaya Kumar & Nelson T Joseph, "Analysis of the Air Termination System of the Lightning Protection Scheme for the Indian Satellite Launch Pad",  IEE Proceedings, Science & Measurement Technology,  Volume 150, Issue 01, January 2003.

    37. Udaya Kumar & Vasu Mogaveera, "Studies on Voltage distribution in ZnO Surge Arrester", IEE Proceedings,  Generation, Transmission & Distribution, Vol. 149, No. 4, July 2002.

    38. Udaya Kumar & G.R. Nagabhushana, "Novel Model for the Simulation of Lightning Stepped Leader", IEE Proceedings, Science & Measurement Technology, Vol. 147, No. 2, March 2000, pp. 56-64.

    39. Udaya Kumar & GR Nagabhushana, "Capacitive-Resistive Transients in terms of field quantities", Journal of Indian Institute of Science, Vol-74, Sept-Oct. 1994, pp.633-645.

    40. Udaya Kumar & GR Nagabhushana, "Images in Linearly Conducting Dielectrics", IEE Proceedings, Science & Measurement Technology, Vol. 144, No. 4, July 1997, pp.163-167.

    Published in International Conferences

    1. G.R. Nagabushana, Joy Thomas, Udaya Kumar, D. Venkateswara Rao & P.V. Panduranga Rao, "Lightning Protection System to the Indian Satellite Launch Pad", Paper No. 2.212.S11, 11th International Symposium on High Voltage Engineering, London, 23-27, Aug. 99.

    2. Udaya Kumar & G.R. Nagabhushana, "Analysis of Lightning Protection System for Indian Satellite Launch Pad", National Interagency coordination group Lightning Conference, Orlando, Florida, USA, 12th April 2000.

    3. Udaya Kumar, "The Ground Field Induced by the Stepped Leader Over a Realistic Earth", National Interagency coordination group Lightning Conference, Orlando, Florida, USA, 12th April 2000.

    4. Udaya Kumar & GR Nagabhushana, "Solution of Capacitive-Resistive Transient fields", 9th International Symposium on High Voltage Engineering, paper no. 8351, Graz, Aug-Sept. 1995.

    5. Gopal HG, Udaya Kumar & GR Nagabhushana, "Application of Circuit Simulation Software for the Solution of Some Second Order Scalar Partial Differential Equations", Proceedings of the Sixth Annual Conference of IEE of Japan Power & Energy, Nagoya, Aug. 2-4, 1995, pp. 309.

    6. Udaya Kumar & GR Nagabhushana, "A Generalised Definition for Inductance and RLC Type Transient Fields in Coils", 10th International Symposium on High Voltage Engineering, paper no. 3350, Montreal, Aug. 25-29, 1997.

    7. Udaya Kumar & GR Nagabhushana, "A New Model for the Lightning Stepped Leader", 10th International Symposium on High Voltage Engineering, paper no. 3351, Montreal, Aug. 25-29, 1997.

    8. Archana Sharma, K. Nanu, D.K. Sharma, K.V. Nagesh, P.H. Ron, Udaya Kumar and G.R. Nagabhushana, "Study of surface flashover in transformer oil under pulsed excitation", Int. Symposisum on High Voltage Engineering, 2001, August 24-27, Bangalore.

    9. Udaya Kumar & Goutham Ghosh,"On the Efficacy of the Lightning Mast on Structures",  International Symposium on High Voltage Engineering, Bangalore, August 2001.

    10. Archana Sharma, K.V. Nagesh, R.C. Sethi, Udaya Kumar and G.R.Nagabhushana, Surface flashover field analysis of vacuum/oil interface in the cavity of induction accelerator", IDES-2002, 30th June to 3rd July, CA, USA.

    11. Archana Sharma, S.Acharya, K.V.Nagesh and R.C.Sethi, G.R.Nagabhushana and   Udaya kumar,Surface flashover of spacer in vacuum/oil interface,IEEE- Int. Sym. on dielectrics, surface and vacuum insulations, ISDEVI-2002, France,30th June to 5th July, 2002.

    12. Archana Sharma,  K.V.Nagesh, R.C.Sethi, Udaya Kumar and G.R.Nagabhushana, Surface flashover phenomena at vacuum/oil interface,IEEE - Int. Conf. on Vacuum   Electron devices IVEC-California, 26th to 30th April, 2002.

    13. Nelson T Joseph & Udaya Kumar, "Evaluation of the Protective Action of LPS to Indian Satellite Launch Pad II", International Symposium on High Voltage Engineering, Bangalore, August 2001.

    14. Subba Reddy B,Pollution Flashover Studies on High Voltage Ceramic Insulator Strings,paper presented at the 11th IEEE International Student Conference on Electrical Engineering, at Czech Technical University, Czech Republic on 17th May 2007, Session: PE, paper:1, pp 1-6. [Received best paper presentation award, cash prize & Diploma]

    15. Udaya Kumar, Rosy Balaram Raysaha and Dileep Kumar K,Direct Time Domain Modelling of First Return Stroke of Lightning,29th International Conference on Lightning Protection ICLP2008, Uppsala, Sweden, June 2008, Paper No. 1a-6

    16. Udaya Kumar and Jothirmayi R,Studies on Potential Rise on Typical Down Conductors During Stroke Interception,29th International Conference on Lightning Protection ICLP2008, Uppsala, Sweden, June 2008, Paper No. 5c-4

    17. Subba Reddy B and Udaya Kumar, "Potential and Electric Field Profiles for Transmission line Insulators", IASTED International Conference on Power and Energy Systems (AsiaPES 2008) Langkawi, Malaysia, paper No:606-115, April 2 - 4, 2008.

    18. Subba Reddy B and Udaya Kumar,An innovative approach to improve pollution flashover performance of transmission line insulators,paper presented at 32nd National Systems Conference held at Indian Institute of Technology Roorkee-India during 17th -19th Dec 2008, paper No: 117, pp 219-224 [Received best paper presentation award]

    19. Vishwanath Hegde and Udaya Kumar,Classification of Strokes and Identification of Stroke Location from the Measured Tower Base Currents of LPS to Indian Satellite Launch Pad-I, The 8th International Power Engineering Conference IPEC07, Singapore, 3  6th December, 2007, pp. 1603 1608.

    20. Udaya Kumar, Rosy B. Raysaha and Dileepkumar K. P., "Direct Time Domain Modeling of First Return Stroke of Lightning", in Proceedings of 29th International Conference on Lightning Protection, Uppsala, Sweden, 23rd  26th June 2008.

    21. Rosy Balaram Raysaha and Udaya Kumar, "Role of Channel Conductance and Corona Sheath on Return Stroke Current Evolution", 4th International Symposium on Lightning Physics and Effects, Vienna, Austria, 25th - 27th May 2009

    22. Subba Reddy B and Udaya Kumar, Field Reduction Electrodes for the possible improvement in the pollution flashover performance of Porcelain Insulators, paper presented at the 9th IEEE International Conference on Properties & Applications of Dielectric Materials (ICPADM-2009) held at Harbin-China, during 19th -23rd July 2009. Vol.2, pp-671-674

    23. Subba Reddy B and Udaya Kumar, A Novel Technique for Improving the Pollution Performance of High Voltage Ceramic Insulators, paper presented at the 8th International Seminar on Electrical & Electronic Insulating Materials & Systems INSULEC-2009 during 18th 20th February 2009, Bangalore-India, Session V, pp V-23 to V-30. [Received appreciation certificate and cash prize ]

    24. Subba Reddy B and Udaya Kumar,A Unique Artificial Pollution Laboratory at IISc paper presented at the International Conference on Instrumentation, Organized by Instrument society of India at Cummins College of Engg, Pune-India, during 21st 23rd Jan 2010, Session:7, paper No:1.

    25. Subba Reddy B and Udaya Kumar, Modeling and Fabrication of a Portable Surge Generator, paper presented at the International Conference on Instrumentation, Organized by Instrument society of India at Cummins College of Engg, Pune-India, during 21st 23rd Jan 2010, Session:7, paper No:6.

    26. Subba Reddy B and Udaya Kumar,Simulation of surface and volume stress for high voltage transmission insulators, 4th International Conference on Computer Applications in Electrical Engg Recent Advances, CERA-09, held at Indian Institute of Technology Roorkee-India, during 19th - 21st Feb 2010, Session A3, Paper ID:539

    27. Rosy B. Raysaha, Udaya Kumar, Vernon Cooray and Rajeev Thottappillil, "Special Case of Lightning Strike to Tall Objects on Ground", in Proceedings of 30th International Conference on Lightning Protection, Cagliari, Italy, 12th 17th September 2010.

    28. Subba Reddy B and Udaya Kumar,Investigations on the Corona performance of a Ceramic disc Insulators integrated with Field Reduction Electrodes,paper presented at the IEEE-IAS Annual meet held at Houston- Texas-USA, during 3rd-7th Oct-2010 Paper No:IAS21p03.
    29. Udaya Kumar and Rosy Balaram Raysaha,Genesis of Return Stroke Current Evolution at the Wavefront,Asia-pacific lightning conference (APL2011), Chengdu, China, 1-4, November 2011, TC2-73-1.

    30. Sreenita Chatterjee and Udaya Kumar, "Design of Corona Control Rings for EHV/UHV Line Hardware and Substations", 10th IEEE - International Conference on Properties and Application of Dielectric Materials", July 24-28, 2012, Bangalore.

    31. Subba Reddy B, Udaya Kumar & Debasish Nath, "Correlation between corona current and radio interference due to high voltage insulator string", IEEE 2012 Electrostatics Joint conference, held at Cambridge, Ontario, Canada, June 12-14, 2012.

    32. Subba Reddy B, Satish Naik, Udaya Kumar and L Satish, " Potential and Electric Field distribution in a Ceramic disc Insulator String with faulty insulators", International Conference on Properties and Application of Dielectric Materials", July 24-28, 2012, Bangalore.

    33. Subba Reddy B and Udaya Kumar, "Performance of Telecommunication modules to 0.5µs-100kHz Ring Wave Surges", International Conference on Properties and Application of Dielectric Materials", July 24-28, 2012, Bangalore.

    34. Udaya Kumar and Govind Rao Kunkolienker, "Basic Features of Current Induced/Shared by Cables Mounted on Towers/Down conductors during stroke interception", 31st International Conference on Lightning Protection (ICLP2012), held in Vienna, Austria, 2012.

    35. Udaya Kumar and Debasish Nath "Dimensioning of Corona Control Rings for High Voltage Lines and Substations" International Colloquium on Ultra High Voltage to be jointly conducted by CBIP and CIGRE, Delhi, 3-4th April 2013.
    36. Udaya Kumar and Govinda Rao K., "Estimation of electrical stress in insulated down conductors and cables", Asia-Pacific International Lightning Conference, scheduled for June 2013 at Seoul, Korea, June 26-28, 2013.

    37. Udaya Kumar and Sreeram V, "Modelling Proximity Effects in Transverse Magnetic Mode for Lightning Studies", International Conference On Lightning Protection (ICLP) 2014, Shanghai, Chain, Oct 12-18, 2014, Paper No. 474.

    38. Udaya Kumar and Sruthi Ajay, "Lightning Induced Currents in Isolated Towers", International Conference On Lightning Protection (ICLP) 2014, Shanghai, Chain, Oct 12-18, 2014, Paper No. 450.

    39. Udaya Kumar and Sukesh A, "Simulation for Strike to Conductor with a Simplified Line Model", Asia-Pacific International Lightning Conference, (APL) 2015, Nagoya, Japan, 22 - 26th June, 2015, Paper No. TC5.1-5.

    40. Sukesh and Udaya Kumar, "Correlation between leader charge and peak current as depicted by self-consistent return stroke model", International Conference on Lightning Protection (ICLP 2016), Portugal, Sept. 2016.

    41. Udaya Kumar and Vladmir Rakov, "Electrical stress on outer insulation of buried cables due to a nearby lightning strike to ground", International Conference on Lightning Protection (ICLP 2016), Portugal, Sept. 2016.

    42. Udaya Kumar and Santosh J., "Time domain approach for modelling transformer windings for propagation of fast discharge pulses", 14th International conference on electromagnetic interference and compatibility (INCEMIC 2016), Dec 2016.

    43. S. Subramanian and U. Kumar, "Existence of boundary error transverse to the velocity in SU/PG solution of moving conductor problem," 2016 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO), Beijing, 2016, pp. 1-2.

    44. Santosh J and Udaya Kumar, " Preliminary Investigations on Propagation of Partial Discharge Induced Currents in a Transformer Winding", 2015 International Conference on Condition Assessment Techniques in Electrical Systems (CATCON), Ropar, Nov. 2017.

    45. Rupam Pal and Udaya Kumar, "Issues Related with use of FDTD in Return-stroke Modeling", AsiaEM Symposium Bangalore, July 2017.

    46. Santosh J and Udaya Kumar, " Limit for the Circuit Model for Rogowski Coil",AsiaEM Symposium Bangalore, July 2017.

    47. Udaya Kumar and Vernon Cooray, "Limitations of RSM in Zoning of Aircrafts", 10th Asia Pacific Lightning Conference, Krabi, Thailand, May 2017

    48. Udaya Kumar and Rupam Pal, "The details of electric field in the close range for a first return stroke", 10th Asia Pacific Lightning Conference, Krabi, Thailand, May 2017


    Published in National Conference:

    1. Udaya Kumar, BN Jayaram, NK KIsjore & GR Nagabhushana,Contouring of Insulation Barriers in High Voltage Transformersthe,1990 Anays Conference, 1990, new Delhi, pp. 4.

    2. Udaya Kumar & GR Nagabhushana,Field Modelling of the Stepped Leader Propagation,3rd Workshop & Conference on EHV Technology, Aug. 1995, Bangalore, pp. 93-97.

    3. Udaya Kumar & G.R. Nagabhushana, "Electromagnetic Model for the Simulation of the Lightning Return Stroke", 4th Workshop & Conference on EHV Technology, July 1998, Bangalore, pp. 89-93.

    4. Udaya Kumar, Vishwanath Hegde and Govind R Kunkolienker,Lightning Current Distribution Along typical Down Conductors,National Power System Conference 04, IIT Madras, Chennai, India, December 2004.

    5. Udaya Kumar, Govind R. Kunkolienker and Vishwanath Hegde,Can We Have a Separate Down Conductor For Metallic and RCC Towers,National Power System Conference 04, IIT Madras, Chennai, India, December 2004.

    6. Udaya Kumar and R. GangiReddy,Issues Pertaining to Measurement of Lightning Currents through Tall Towers,National Power System Conference 04, IIT Madras, Chennai, India, December 2004.

    7. Udaya Kumar and S. Srinivava Rao,Studies on the performance of Rogowski coils for fast pulses,National Power System Conference 04, IIT Madras, Chennai, India, December 2004.

    8. Udaya Kumar,Investigations on Lightning Induced Currents in Protection System to Indian Satellite Launch Pads,The 24th Annual In-house Symposium on Space Technology, IISc, Bangalore, January 2008

    9. Udaya Kumar,Classification of Strokes and Estimation of Incident Stroke Current from the Measured Tower Base Currents of LPS to Indian Satellite Launch Pad-II, Conference on Advances in Space Science and Technology CASST 2007, Bangalore, January 2007.

    10. Subba Reddy B and Udaya Kumar, "An innovative approach to improve pollution flashover performance of transmission line insulators", 32nd National Systems Conference held at Indian Institute of Technology Roorkee-India during 17th -19th Dec 2008, paper No: 117, pp. 219-224. [Received best paper presentation award]/li>
    11. Subba Reddy B and Udaya Kumar, "A Hybrid Impulse Generator", National Symposium on Instrumentation (NSI-35), Visweswaraya Technological University (VTU), Belgaum- Karnataka, January 7-9, 2011. Conf Proc: CE, paper :1, pp-40

    12. Subba Reddy B and Udaya Kumar, "Electric Field Profiles for EHV Porcelain Insulators", MCDES-2008, an IISc Centenary International Conference, held at Bangalore, paper ID:151,  27th -31st May 2008.

    13. Rosy Balarma Raysaha and Udaya Kumar,Review of Lightning Return Stroke Models for the Direct Hit Scenario,MCDES-2008, an IISc Centenary International Conference, held at Bangalore, paper ID:156,  27th -31st May 2008.
    14. Vinoda Shivananda, Vishwanath Hegde & Udaya Kumar,Effect of nearby conducting objects on the induced currents in simple down conductors due to an indirect lightning,Centenary conference of electrical engineering, IISc, 15-17, December, 2011.

    15. Rosy Balaram Raysaha and Udaya Kumar,An Inquisitive Analysis on the Temporal Variation of Return Stroke Current Essential for Producing Observed Remote Electro-Magnetic Fields,Centenary conference of electrical engineering, IISc, 15-17, December, 2011..

    16. Udaya Kumar and KK Rajan, A Finite Element Method Based Approach for Evaluating the Sensitivity of Faraday-Type Electromagnetic Flow Meter for Liquid Sodium Flow, Centenary conference of electrical engineering, IISc, 15-17, December, 2011.

    Technical reports prepared for the project:

    1. Udaya Kumar, Final report on the project, "Development of a Lightning Protection Scheme For Launch Pad II at SHAR", Sponsored by SHAR, ISRO. (2001). It basically comprises of two reports
      • Simulation & Analysis of the Aerial Receptor System
      • Detailed Analysis of the Ground Dissipater System

    2. Udaya Kumar, Final report on the project, "Development of sensors for the measurement of lightning currents in the strokes intercepted by the lightning protection system at SHAR", Sponsored by ISRO-IISc Space Technology Cell (2002)

    3. Udaya Kumar, Final report on the project, "Estimation of post-stroke potential distribution at some critical regions of PSLV/GSLV launch pad", Sponsored by SDSC Centre, SHAR, ISRO (2003).

    4. Udaya Kumar, Final report on the project, "Experimental Investigation with the Scaled-Down Models for the Post-stroke Potential Differences & Currents  in UT/MST and LPS",  Sponsored by ISRO-IISc Space Technology Cell (2004)

    5. Udaya Kumar, Final Report on the Project,Investigations on the Current Distribution in LPS During Lightning and Reconstruction of the Stroke Current From the Measured Tower Base Current,Sponsored by ISRO-IISc Space Technology Cell (2008)

    6. Udaya Kumar,Closure Report on (i) Design of Corona Control Rings for the common 800 kV platform housing FSC & (ii) Design of Corona Control Rings for Equipments on common 800 kV FSC platform (2010)

    7. Udaya Kumar, Final Report on the Developmental Project "Development of Computer Code for Evaluating the Permanent Magnet Flowmeter", Sponsored by Indira Gandhi Centre for Atomic Research, India, 2012.

    8. Subba Reddy B & Udaya Kumar,Performance of Ceramic Insulators Integrated with FCE,(2010).
  
     
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