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Kari Lappalainen
Research topics
Photovoltaic power systems, energy storage systems, renewable energy
Latest publications
Comparing solar inverter design rules to subhourly solar resource simulations
Zamora Zapata, M., Lappalainen, K., Kankiewicz, A. & Kleissl, J., Sept 2023, In: Journal of Renewable and Sustainable Energy. 15, 5, 10 p., 053501.Research output: Contribution to journal › Article › Scientific › peer-review
Comparison between Decentralized and Centralized Energy Storage Systems for Power Ramp Rate Control of PV Systems
Lappalainen, K. & Kleissl, J., 2023, 40th European Photovoltaic Solar Energy Conference and Exhibition. EU PVSEC, 6 p. (Proceedings (EU PVSEC)).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific › peer-review
Effects of Capacity Factor on Sizing of Energy Storage Systems for Electric Vehicle Charging Plazas
Lappalainen, K. & Kleissl, J., Dec 2023, 2023 IEEE PES Innovative Smart Grid Technologies - Asia (ISGT Asia). IEEE, 5 p. (IEEE Innovative Smart Grid Technologies - Asia).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific › peer-review
Effects of Control Strategy on Sizing of Energy Storage Systems for PV-Wind Power Plants
Talvi, M. & Lappalainen, K., 2023, 40th European Photovoltaic Solar Energy Conference and Exhibition. EU PVSEC, 7 p. (Proceedings (EU PVSEC)).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific › peer-review
Effects of Ramp Rate Limit on Sizing of Energy Storage System for PV-Wind Power System
Talvi, M., Roinila, T. & Lappalainen, K., 2023, Automaatiopäivät 2023 - Automation Days 2023 Proceedings. Suomen Automaatioseura, 3 p.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific › peer-review
Effects of Ramp Rate Limit on Sizing of Energy Storage Systems for PV, Wind and PV–Wind Power Plants
Talvi, M., Roinila, T. & Lappalainen, K., 2023, In: Energies. 16, 11, 18 p., 4313.Research output: Contribution to journal › Article › Scientific › peer-review
Photovoltaic module series resistance identification at its maximum power production
Lappalainen, K., Piliougine, M., Valkealahti, S. & Spagnuolo, G., 1 Jun 2023, (E-pub ahead of print) In: Mathematics and Computers in Simulation.Research output: Contribution to journal › Article › Scientific › peer-review
Sizing of stationary energy storage systems for electric vehicle charging plazas
Lappalainen, K. & Kleissl, J., 2023, In: Applied Energy. 347, 8 p., 121496.Research output: Contribution to journal › Article › Scientific › peer-review
Analysis of the operation of PV strings at the MPP closest to the nominal MPP voltage instead of the global MPP based on measured current–voltage curves
Lappalainen, K. & Valkealahti, S., 20 Jan 2022, In: EPJ Photovoltaics. 13, 10 p., 4.Research output: Contribution to journal › Article › Scientific › peer-review
A novel procedure for identifying the parameters of the single-diode model and the operating conditions of a photovoltaic module from measured current–voltage curves
Kalliojärvi-Viljakainen, H., Lappalainen, K. & Valkealahti, S., Nov 2022, In: Energy Reports. 8, p. 4633-4640 8 p.Research output: Contribution to journal › Article › Scientific › peer-review