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A study for an optimization of a hybrid renewable energy system as a part of decentralized power supply

Author(s): Y. Stefanov, K. Ivanov, P. Petrov
Technical University of Gabrovo, Hadji Dimitar 4, Gabrovo 5300, Bulgaria
International Journal of Smart Grid and Clean Energy, vol. 6, no. 3, July 2017: pp. 141-148
ISSN: 2315-4462 (Print)
ISSN: 2373-3594 (Online)
Digital Object Identifier: 10.12720/sgce.6.3.141-148

Abstract:The objective of this paper is to describe the optimization of a hybrid renewable energy system. The system is intended to supply a residential neighborhood with thermal and electrical power. A software based model has been developed to serve as an experimental tool for calculations and comparison. The aim of the research is to find an optimal size per each element of the system due to the demand to keep the system as independent from the public grid as it is possible. The proposed system model consists of a combined heat and power plant, thermal boiler and a photovoltaic array with an additional lithium-ion battery for electrical energy storage. A methodology based on optimal power production for maximal covering of consumer`s demands is applied in a combination with approximate prizes per natural gas, prizes per purchased and sold back electrical energy from and to the utility grid. Results formed as graphs and comparable cases are expected as outcomes, based on the most optimal calculations for lowest net present cost per purchases from the utility grid.

Keywords:Thermal boiler, combined heat and power plant, photovoltaic array, lithium-ion battery system

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