Improvement of the Grid-Tied Solar-Wind System with a Storage Battery for the Self-Consumption of a Local Object

Olexandr Shavolkin, Iryna Shvedchykova, Michal Kolcun and Dušan Medved’
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Olexandr Shavolkin: Department of Computer Engineering and Electromechanics, Institute of Engineering and Information Technologies, Kyiv National University of Technologies and Design, Nemyrovycha-Danchenka Street, 2, 01011 Kyiv, Ukraine
Iryna Shvedchykova: Department of Computer Engineering and Electromechanics, Institute of Engineering and Information Technologies, Kyiv National University of Technologies and Design, Nemyrovycha-Danchenka Street, 2, 01011 Kyiv, Ukraine
Michal Kolcun: Department of Electric Power Engineering, Faculty of Electrical Engineering and Informatics, Technical University of Kosice, Letná 9, 042 00 Košice, Slovakia
Dušan Medved’: Department of Electric Power Engineering, Faculty of Electrical Engineering and Informatics, Technical University of Kosice, Letná 9, 042 00 Košice, Slovakia

Energies, 2022, vol. 15, issue 14, 1-18

Abstract: This work aimed to improve how the equipment of a grid-tied solar-wind system used the installed power of the storage battery while reducing the cost of electricity consumed by a local object from the grid. A method for calculating the parameters for a given load schedule is proposed, along with the value of the reduction in electricity consumption. Values for the power generation of a wind generator and photovoltaic battery are based on archival data. The possible power ratio of the wind generator and the photovoltaic battery is 1:8.33. The formation of the state of charge of the battery involves: a calculation of its value for the morning peak according to the forecast for the next day; adjustable discharge in the evening with full or partial compensation for the load consumption according to the forecast for the next day; a night charge with a given current value. At a one-tariff plan, one battery discharge cycle per day is used. A night charge from the grid is not used. With a two-tariff plan and the use of a night battery charge from the grid, one discharge cycle is used in the spring-summer-autumn period. The simulation confirms the possibility of reducing electricity costs by 2.9 times in winter, which corresponds to the set value, alongside a complete elimination of costs in summer.

Keywords: energy saving; graph of charge degree of storage battery; load schedule; reducing the installed power of renewable sources; self-consumption of local object; solar-wind system with storage battery (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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