Publications

Book chapters

  • N. Pearsall and R. Gottschalg, 2012, Performance Monitoring, in the book entitled: “Comprehensive Renewable Energy” edited by Ali Sayigh, Volume 1, pp. 775-786, doi:10.1016/B978-0-08-087872-0.00144-X.

Journal publications

  • Wu, D., et al. (2015). “Optimal Lamination Conditions for Photovoltaic Modules to Ensure Durability and Reliability.” IEEE Transactions on Reliability: Accepted.
  • B.Goss, I.Cole, T.R.Betts, R.Gottschalg, “Irradiance modelling for individual cells of shaded solar photovoltaic arrays“, Solar Energy 110, 410-419, dx.doi.org/10.1016/j.solener.2014.09.037
  • H. Qasem, T.R. Betts and R. Gottschalg, 2013, “Spatially-Resolved Modelling of Dust Effect on Cadmium Telluride Photovoltaic Modules,” Solar Energy, 90, 154-163, DOI: 10.1016/j.solener.2013.01.013.
  • Dan Wu, Jiang Zhu, Thomas R. Betts, Ralph Gottschalg, 2013, “Degradation of Interfacial Adhesion Strength within PV Mini-Modules during Damp-Heat Exposure”, Progress in Photovoltaics, Accepted. Open Access
  • Gobind Gopalakrishna Pillai, Ghanim A Putrus, Tatiani Georgitsioti and Nicola M. Pearsall “Near-Term Economic Benefits from Grid-Connected Residential PV Systems”, Energy, 68, (2014), 832-843


Conference proceedings

  • X. Wu, M. Bliss, T.R. Betts and R. Gottschalg, 2015, Effects of lateral resistances in photovoltaic cells and full 2-D parameter extraction for the spatially-resolved models using electroluminescence images”,  PVSAT-11
  • J. Zhu, G. Surier, D. Wu, D. Montiel-Chicharro, T.R. Betts, R. Gottschalg, Adhesion testing for photovoltaic laminates, 11 PV-SAT, Leeds, UK, 2015
  • J. Zhu, G. Surier, D. Wu, D. Montiel-Chicharro, M. Owen-Bellini, K. Bedrich, T.R. Betts, R. Gottschalg, Influence of lamination condition on device durability for EVA-encapsulated PV modules, Proceedings of 31 European Photovoltaic Solar Energy Conference (EUPVSEC), Hamburg, 2015
  • M. Owen-Bellini, J. Zhu, T.R. Betts, R. Gottschalg, Environmental Stress Potentials of Different Climatic Regions, Proceedings of 31 European Photovoltaic Solar Energy Conference (EUPVSEC), Hamburg, 2015
  • H. Qasem, T.R. Betts, H. Müllejans, H. AlBusairi, R. Gottschalg. Effect of dust shading on photovoltaic modules. Proceedings of the 26th European Photovoltaic Solar Energy Conference, Hamburg. pp. 3652-3656, 2011. WIP.
  • M. Bliss, J. Zhu, T. R. Betts, R. Gottschalg. Performance of Amorphous Silicon in the Initial, Degraded and Annealed States Under Varying Spectrum, Irradiance and Temperature. in Proceedings of the 26th European Photovoltaic Solar Energy Conference, Hamburg. 2011. WIP.
  • Zhu, J., Bliss, M., Betts, T., and Gottschalg, R., Ageing of Amorphous Silicon Devices in Dependence of Irradiance Dose. in Proceedings of the 21st Photovoltaic Science and Engineering Conference, Fukuoka. 2011.
  • Wu, D., Zhu, J., Betts, T., and Gottschalg, R., Long Term Degradation of Photovoltaic Devices under Real Outdoor Operating Conditions. in Proceedings of the 21st Photovoltaic Science and Engineering Conference, Fukuoka. 2011.
  • Gottschalg, R. and T.R. Betts. Robustness of Energy Yield Measurements of Photovoltaic Modules. in Proceedings of the 26th European Photovoltaic Solar Energy Conference, Hamburg. 2011. WIP.
  • Betts, T. and R. Gottschalg. Energy Yield Prediction of Photovoltaic Modules based on Advanced Indoor Characterisation. in Proceedings of the 8th Photovoltaic Science, Application and Technology (PVSAT) Conference, Newcastle upon Tyne. 2012. UK-ISES.
  • Wu, D., Zhu, J., Betts, T., and Gottschalg, R., PV module degradation mechanisms under different environmental stress factors. in Proceedings of the 8th Photovoltaic Science, Application and Technology (PVSAT) Conference, Newcastle upon Tyne. 2012. UK-ISES.
  • H. Qasem, H. AlBusairi, T.R. Betts and R. Gottschalg, Measurements of dust induced performance losses on Micromorph Photovoltaic Modules in Kuwait. 2012, 27th EUPVSEC, Frankfurt, Germany.
  • H. Qasem, T.R. Betts and R. Gottschalg, Soiling Correction Model for Long Term Energy Prediction in photovoltaic modules. 2012, 38 IEEE PV specialist, Austin, Texas, USA, ISBN 978-1-4673-0064-3, DOI 10.1109/PVSC.2012.6318299.
  • I. Sara, T. Betts and R. Gottschalg, Analysis of a Suitable Model for Spectral Response of a Photovoltaic Device. 2012, 27th EU PVSEC Frankfurt, pp. 471-475, WIP-Munich, ISBN 3-936338-28-0, DOI 10.4229/27thEUPVSEC2012-1CV.8.21.
  • Mr.Yashodhan. P. Agalgaonkar ,Dr. Bikash C Pal, Dr.Ravindra Singh, “Impact of Photo Voltaic generation control on multi machine small signal stability ” International Federation of Automatic Control(IFAC) 2012 conference at France. September 2012.
  • Shabnam Raschti, Pablo D. Ruiz, Ricky D. Wildman, Ian A. Ashcroft and Adel E. Elmahdy, 2012. Measurement of the hygroscopic expansion coefficient of Ethylene Vinyl Acetate using wavelength scanning interferometry. Photon 12, 3 – 6 September 2012, Durham University, Durham, UK.
  • Shabnam Rashtchi , Pablo D. Ruiz a, Ricky Wildman a, Ian Ashcroft, 2012, Measurement of moisture content in photovoltaic panel encapsulants using spectroscopic optical coherence tomography: a feasibility study, SPIE Optics and photonics 2012, 12-16 Aug 2012 –San Diego –California-USA.
  • Dan Wu, Jiang Zhu, Thomas R. Betts, Ralph Gottschalg, 2013, “Degradation Study of the Adhesion Strength of Mini-Modules under Damp Heat Conditions”, Proceedings of 28th European Photovoltaic Solar Energy Conference (EUPVSEC), Paris.
  • Xiaofeng Wu, Martin Bliss, Tom Betts, Archana Sinha, Rajesh Gupta, Ralph Gottschalg. 2013, Modeling Spatial Electrical Behavior of Photovoltaic Modules Using PV-oriented Nodal Analysis. Proceedings of the 39th Annual Conference of the IEEE Industrial Electronics Society (IECON 2013), Austria, 10 – 13 Nov 2013. pp. 8090-8095.
  • I.D. Sara, T.R. Betts, R. Gottschalg, 2013, “Determining Spectral Response of a Photovoltaic Device using Polychromatic Filters”, Proceedings of 9th Photovoltaic Science Application and Technology (PVSAT-9), UK Solar Energy Society, Swansea.
  • T.R. Betts, R. Gottschalg, 2013, “Expected Variability of Monthly and Annual Energy Yield over PV System Lifetime”, Proceedings of 9th Photovoltaic Science Application and Technology (PVSAT-9), UK Solar Energy Society, Swansea.
  • Xiaofeng Wu, Martin Bliss, Archana Sinha, Tom Betts, Ralph Gottschalg, Rajesh Gupta, 2013, “A Distributed Modelling Approach for Spatially-resolved Characterisation of Thin-film Photovoltaic Modules”, Proceedings of 9th Photovoltaic Science Application and Technology (PVSAT-9), UK Solar Energy Society, Swansea.
  • M. Bliss, A. Smith, B. Mihaylov, T.R. Betts, R. Gottschalg, 2013, Spectral Changes of Solar Simulator Xenon Flash Bulbs over Lifetime and its Effects on Measurement Uncertainty, Proceedings of 9th Photovoltaic Science Application and Technology (PVSAT-9), UK Solar Energy Society, Swansea.
  • Martin Bliss, Alex Smith, Blagovest Mihaylov, Michal Krawczynski, Thomas R. Betts, Ralph Gottschalg, 2013, “Measurement of flash solar simulator output spectra over bulb lifetime and the effects on spectral mismatch”, Proceedings of 28th European Photovoltaic Solar Energy Conference (EUPVSEC), Paris.
  • T. Georgitsioti, N. M. Pearsall and I. Forbes, 2013, The Simplified Levelized Cost of the Domestic PV Energy in the UK: The Importance of the Feed-in Tariff Scheme, Proceedings of 9th Photovoltaic Science Application and Technology (PVSAT-9), UK Solar Energy Society, Swansea.
  • Gobind G. Pillai, Ghanim A. Putrus, Nicola M. Pearsall, “Impact of Distribution Network Voltage Rise on PV System Energy Yield”, IEEE INDICON 2013, Mumbai, 13th -15th December 2013
  • Gobind G. Pillai, Ghanim A. Putrus, Nicola M. Pearsall, “The Potential of Demand Side Management to Facilitate PV Penetration”, IEEE PES Innovative Smart Grid Technologies ASIA (ISGT ASIA 2013), Bangalore, India, 10th -13th November 2013.
  • Gobind G. Pillai, Ghanim A. Putrus, Nicola M. Pearsall, “Impact of Policy Reforms, in Response to Higher PV Penetration Challenges, on PV Energy Usage”, IGCCIA International Research Conference 2013, Goa, India, 23rd November 2013.
  • Gobind Pillai, R. S. Anand, Nicola Pearsall, Ghanim Putrus, Tatiani Georgitsioti, Ian Forbes, R. Pon Perumal and Shivam Srivastava, “Role of Routine Visual Inspection in Performance Monitoring of Photovoltaic (PV) Systems”, International Conference on Energy Efficient LED Lighting and Solar PhotoVoltaic Systems at Indian Institute of Technology, Kanpur, March 2014.
  • T. Georgitsioti, N. Pearsall, R. S. Anand, G. Pillai, R. P. Perumal, I. Forbes, S. Srivastava and D. Sahu, “Short term Performance Variations of Different PV System Technologies under the Humid Subtropical Climate of Kanpur in India”,  PVSAT-10, UK Solar Energy Society, Loughborough, April 2014.
  • Gobind Pillai, Ghanim Putrus, Nicola Pearsall, R. S. Anand, R. Pon Perumal, “Performance Assessment of Grid-Connected Photovoltaic Inverters Based on Field Monitoring in India”, IEEE PEDG 2014,Galway, Ireland, June 2014
  • J. Zhu, M. Bliss, T.R. Betts, R. Gottschalg, Towards modelling realistic ageing rates of amorphous silicon devices in operational environments, 6 WCPEC, Kyoto, Japan, 2014. (accepted as oral)
  • D. Wu, J. Zhu, T.R. Betts, R. Gottschalg, The Effects of Lamination Conditions on the Properties of Encapsulation Materials of Photovoltaic Modules, 10 PV-SAT, Loughborough, UK, 2014.
  • J. Zhu, T.R. Betts, R. Gottschalg, 2014, ffects of lamination condition on durability of PV module packaging and performance, 10 PV-SAT, Loughborough, UK.
  • M. Bliss, X. Wu, K. Bedrich, T.R. Betts, R. Gottschalg, 2014, “Spatially and Spectrally Resolved Electroluminescence Measurement System for PV Characterisation”, 10th PVSAT, Loughborough, UK.
  • M. Bliss, F. Plyta, T.R. Betts, R. Gottschalg, 2014, “LEDs Based Characterisation of Photovoltaic Devices”, International Conference on Energy Efficient LED Lighting and Solar Photovoltaic Systems at Indian Institute of Technology, Kanpur, March 2014.
  • Xiaofeng Wu*, Martin Bliss, Thomas R Betts and Ralph Gottschalg, 2014, Fast Spatially-Resolved Electrical Modelling for Photovoltaic Cells Using Accelerated PV-Oriented Nodal Analysis (PVONA), 10th PVSAT, Loughborough, UK.
  • Xiaofeng Wu, Martin Bliss, Jiang Zhu, Thomas R. Betts and Ralph Gottschalg, 2014, Fast Electrical Modeling for Spatially-Resolved Characterization of Amorphous Silicon Photovoltaic Cells, 40th IEEE Photovoltaic Specialists Conference, Denver, USA.
  • S.Rashtchi, R.Gottschalg and P.D. Ruiz, 2014, “Wavelength Scanning Interferometry Based Determination of Hygroscopic Swelling Coefficient of Encapsulants Used in Photovoltaics”, 10th Photovoltaic Science Application and Technology (PVSAT-10). Conference proceeding, Loughborough, UK.
  • A. Sinha, O.S. Sastry, Y.K. Singh, M. Kumar and R. Gupta, “Performance of Champions Module for PV Lighting Systems in India”, 27th European Photovoltaic Solar Energy Conference, 24-28 September 2012, Frankfurt, Germany.
  • Ankur Kumar Verma, R.S. Anand; Optimum Orientation of Solar Panels and Review – Solar Tracker System; 34th National System Conference, 10-12 Dec 2010, NIT Surathkal, Poster Paper No. T4 DG115
  • Dhiraj Magare, O.S. Sastry, Rajesh Gupta, Arun Kumar and A. Sinha, “Data Logging Strategy of Photovoltaic (PV) Module Test beds”, 27th European Photovoltaic Solar Energy Conference, 24-28 September 2012, Frankfurt, Germany.
  • P. Somasundaran, A. Sinha and R. Gupta, “Simulation and Characterization of Spatial Variation of Shunts in Industrial Solar Cells by PSpice and Dark Lock-in Infrared Thermography”, 27th European Photovoltaic Solar Energy Conference, 24-28 September 2012, Frankfurt, Germany.
  • P. Somasundaran, D.K. Nandi, R. Gupta, “Simulation and Characterization of Shunts in Silicon Solar Cells by Pspice and Lock-in Infrared Thermography”, Solar Asia-2011 International Conference: Solar Energy Materials, Solar Cells and Solar Energy Applications, Proc. pp. 277-283, 2011
  • John H. Wohlgemuth, O.S. Sastry, Adam Stokes, Yogesh Kumar Singh and Mithilesh Kumar, “Characterization of field exposed thin film modules”, 38th IEEE PVSC, 2012 Austin, USA
  • S.K. Chattopadhyay and C. Chakraborty, “Third harmonic injected binary hybrid multilevel inverter for grid connected photovoltaic system,” IEEE International Symposium on Industrial Electronics (ISIE), 27-30 June 2011, pp.1154-1159.
  • S.K. Chattopadhyay and C. Chakraborty “A hybrid multilevel inverter topology with third harmonic injection for grid connected photovoltaic system” National Power Electronic Conference (NPEC), 19-21 December 2011.
  • S.K. Chattopadhyay, C. Chakraborty, and B. Pal, “A hybrid multilevel inverter topology with third harmonic injection for grid connected photovoltaic central inverters,” IEEE International Symposium on Industrial Electronics (ISIE), 28-31 May 2012, pp.1736-1741.
  • S.K. Chattopadhyay, C. Chakraborty, and B. Pal, “A hybrid multilevel inverter topology with third harmonic injection for grid connected photovoltaic central inverters,” IEEE Ind. Elec. Society Annual Conference (IECON), 25-28 October 2012 S. Srivastava, S. Bhardwaj and O.S.Sastry, “A novel Hybrid Model for Solar Radiation Prediction,” IEEE International Conference on Emerging Trends in Electrical Engineering and Energy Management, Chennai, 2012,pp. 308-313.
  • Nataraj Pragallapati, Pooja Sharma, Agarwal Vivek, “A New Voltage Equalization Based Distributed Maximum Power Point Extraction from a PV Source Operating Under Partially Shaded Conditions”, IEEE 39th Photovoltaic Specialists Conference, Tampa, USA, June, 2013.
  • Nataraj Pragallapati, Agarwal Vivek, “Flyback Configuration based Micro-inverter with Distributed MPPT of Partially Shaded PV Module and Energy Recovery Scheme”, IEEE 39th Photovoltaic Specialist Conference, Tampa, USA, June, 2013.
  • Anand Babu, B.G. Fernandes, “Improved Full-Bridge Neutral Point Clamped Transformerless Inverter for Photovoltaic Grid-Connected System, IECON-2013 conference, Vienna, Austria, 2013.
  • Anand Babu, B.G. Fernandes, “A Novel Neutral Point Clamped Transformerless Inverter for Grid-Connected Photo Voltaic System, IECON-2013 conference, Vienna, Austria, 2013.

Posters

  • X. Wu, Spatially-resolved Characterisation of Photovoltaic Devices. Poster presentation, Midlands Energy Graduate School (MEGS), 3rd poster prize, 2012.
  • X. Wu, Spatially-resolved Opto-electronic Characterisation of Encapsulated Photovoltaic Devices. Poster presentation, the LCEDN (Low Carbon Energy for Development Network) 2nd international workshop, 1st poster prize, 2012.
  • Y. Agalgaonkar, B. C. Pal and S. Nachian “Modal Analysis of grid connected Photovoltaic” Student Poster Contest Program at IEEE PES General Meeting 2012, held at San Diego, California, USA during July 22-26, 2012.
  • Y. Agalgaonkar, B.C Pal, G. Anagnostou, 2013, “Optimal operation of Distribution Feeder considering PV generation reactive power support”, Student Poster Contest Program at IEEE PES GM 2013, at Vancouver, Canada, July 21-25, 2013.
  • J. Zhu, D. Wu, D. Montiel-Chicharro, T.R. Betts, R. Gottschalg, Effects of lamination curing temperature on durability of PV module packaging and performance, 6 WCPEC, Kyoto, Japan, 2014. (accepted as poster)
  • D. Wu, J. Zhu, D. Montiel-Chicharro, J. Frese, T.R. Betts, R. Gottschalg Durability of Adhesion of Polymeric Encapsulation Materials within PV Modules in Dependence of Lamination Conditions, 6 WCPEC, Kyoto, Japan, 2014. (accepted as poster)
  • D. Wu, J. Zhu, D. Montiel-Chicharro, T.R. Betts, R. Gottschalg, Influences of Different Lamination Conditions on the Reliability of Encapsulation of PV Modules, 29 EU PVSEC, Amsterdam, the Netherland, 2014. (accepted as poster)
  • Wu, X, 2014, Fast Electrical Modeling for Spatially-Resolved Characterization of Amorphous Silicon Photovoltaic Cells, 40th IEEE Photovoltaic Specialists Conference, Denver, USA.

Patent

  • K. Hesaroor, P. Somasundaran, R. Gupta, “Design and Development of Illuminated Lock-in Thermography Module for Solar Cell and Module Inspection” (recommended by IRCC, IITB based on M.Tech. Thesis, patent application under preparation)

Software Development

  • An initial version of software “SURYA” for simulation of large PV arrays in a realistic time frame is developed by M. B. Patil, Gaurav Trivedi and Abhay Chopde (Jointly with IIT Guwahati and VIT Pune)

Installations

  • The 4 x 2-D trackers for 5 KW of each of the four technologies have been installed at IIT Kanpur.

Technical Standards Contributions

  • R. Gottschalg, 2011, Photovoltaic devices, IEC 60904-SER, Technical Committee: Solar photovoltaic energy systems.

Guest Editorial

  • R. Gottschalg and T.Bruton, 2014, “9th Photovoltaic Science, Application and Technology Conference (PVSAT-9), Swansea University, 10–12 April 2013”, IET Renewable Power Generation, Vol. 8, Iss. 5, p. 443, doi: 10.1049/iet-rpg.2014.0152