Kari Lappalainen
Research topics
Photovoltaic power systems, energy storage systems, renewable energy
Latest publications
Dependence of Series Resistance on Ideality Factor and Shunt Resistance in Online Photovoltaic Module Parametric Identification
Kalliojärvi, H. & Lappalainen, K., 2024, 41st 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 the Operating Point of Photovoltaic Strings on Sizing of DC- and AC-Connected Energy Storage Systems for Power Smoothing
Lappalainen, K., Oct 2024, (E-pub ahead of print) In: Advanced Energy and Sustainability Research. 12 p., 2400199.Research output: Contribution to journal › Article › Scientific › peer-review
Effects of the Operating Point on PV Systems Equipped with Energy Storage
Lappalainen, K., 2024, 41st 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
Photovoltaic module series resistance identification at its maximum power production
Lappalainen, K., Piliougine, M., Valkealahti, S. & Spagnuolo, G., 2024, In: Mathematics and Computers in Simulation. 224, Part A, p. 50-62Research output: Contribution to journal › Article › Scientific › peer-review
Sizing of Energy Storage Systems for Different Levels of PV and Wind Power in Combined PV-Wind Power Plants
Talvi, M. & Lappalainen, K., 2024, 41st European Photovoltaic Solar Energy Conference and Exhibition. EU PVSEC, 5 p. (Proceedings (EU PVSEC)).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific › peer-review
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