All Stories

  1. Analysis of the cloud enhancement phenomenon and its effects on photovoltaic generators based on cloud speed sensor measurements

    Article • Journal of Renewable and Sustainable Energy, July 2020, American Institute of Physics

    Dr. Kari Lappalainen

  2. Number of maximum power points in photovoltaic arrays during partial shading events by clouds

    Article • Renewable Energy, June 2020, Elsevier

    Dr. Kari Lappalainen

  3. Characteristics of the cloud enhancement phenomenon and PV power plants

    Article • Solar Energy, January 2020, Elsevier

    Dr. Kari Lappalainen

  4. Fluctuation of PV array global maximum power point voltage during irradiance transitions caused by clouds

    Article • IET Renewable Power Generation, August 2019, the Institution of Engineering and Technology (the IET)

    Dr. Kari Lappalainen

  5. Photovoltaic Module Parametric Identification

    Article • July 2019, Institute of Electrical & Electronics Engineers (IEEE)

    Dr. Kari Lappalainen

  6. Identification and Diagnosis of a Photovoltaic Module Based on Outdoor Measurements

    Article • June 2019, Institute of Electrical & Electronics Engineers (IEEE)

    Dr. Kari Lappalainen

  7. Smoothing of Output Power Variation with Increasing PV Array Size

    Article • May 2018, Institute of Electrical & Electronics Engineers (IEEE)

    Dr. Kari Lappalainen

  8. Photovoltaic mismatch losses caused by moving clouds

    Article • Solar Energy, December 2017, Elsevier

    Dr. Kari Lappalainen

  9. Effects of PV array layout, electrical configuration and geographic orientation on mismatch losses caused by moving clouds

    Article • Solar Energy, March 2017, Elsevier

    Dr. Kari Lappalainen

  10. Output power variation of different PV array configurations during irradiance transitions caused by moving clouds

    Article • Applied Energy, March 2017, Elsevier

    Dr. Kari Lappalainen

  11. Effects of irradiance transition characteristics on the mismatch losses of different PV array configurations

    Article • IET Renewable Power Generation, November 2016, the Institution of Engineering and Technology (the IET)

    Dr. Kari Lappalainen

  12. Apparent velocity of shadow edges caused by moving clouds

    Article • Solar Energy, November 2016, Elsevier

    Dr. Kari Lappalainen

  13. Effects of irradiance transitions on the output power fluctuations of different PV array configurations

    Article • November 2016, Institute of Electrical & Electronics Engineers (IEEE)

    Dr. Kari Lappalainen

  14. Analysis of shading periods caused by moving clouds

    Article • Solar Energy, October 2016, Elsevier

    Dr. Kari Lappalainen

  15. Recognition and modelling of irradiance transitions caused by moving clouds

    Article • Solar Energy, February 2015, Elsevier

    Dr. Kari Lappalainen

  16. Operation of TUT Solar PV Power Station Research Plant under Partial Shading Caused by Snow and Buildings

    Article • International Journal of Photoenergy, January 2013, Hindawi Publishing Corporation

    Dr. Kari Lappalainen