RETRACTED: A New Method to Energy Saving in a Micro Grid

Andrea Vallati, Stefano Grignaffini and Marco Romagna
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Andrea Vallati: Department of Astronautic, Electric and Energetic Engineering, “Sapienza” University of Rome, via Eudossiana 18, 00184 Rome, Italy
Stefano Grignaffini: Department of Astronautic, Electric and Energetic Engineering, “Sapienza” University of Rome, via Eudossiana 18, 00184 Rome, Italy
Marco Romagna: Department of Astronautic, Electric and Energetic Engineering, “Sapienza” University of Rome, via Eudossiana 18, 00184 Rome, Italy

Sustainability, 2015, vol. 7, issue 10, 1-16

Abstract: Optimization of energy production systems is a relevant issue that must be considered in order to follow the fossil fuels consumption reduction policies and CO 2 emission regulation. Increasing electricity production from renewable resources (e.g., photovoltaic systems and wind farms) is desirable but its unpredictability is a cause of problems for the main grid stability. A system with multiple energy sources represents an efficient solution, by realizing an interface among renewable energy sources, energy storage systems, and conventional power generators. Direct consequences of multi-energy systems are a wider energy flexibility and benefits for the electric grid, the purpose of this paper is to propose the best technology combination for electricity generation from a mix of renewable energy resources to satisfy the electrical needs. The paper identifies the optimal off-grid option and compares this with conventional grid extension, through the use of HOMER software. The solution obtained shows that a hybrid combination of renewable energy generators at an off-grid location can be a cost-effective alternative to grid extension and it is sustainable, techno-economically viable, and environmentally sound. The results show how this innovative energetic approach can provide a cost reduction in power supply and energy fees of 40% and 25%, respectively, and CO 2 emission decrease attained around 18%. Furthermore, the multi-energy system taken as the case study has been optimized through the utilization of three different type of energy storage (Pb-Ac batteries, flywheels, and micro—Compressed Air Energy Storage (C.A.E.S.).

Keywords: multi-energy system; cost of energy; energy storage (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2015
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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