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Research Papers

An Optimum Sizing Methodology for Combined Photovoltaic-Energy Storage Electricity Generation Configurations

[+] Author and Article Information
J. K. Kaldellis

Laboratory of Soft Energy Applications & Environmental Protection, TEI of Piraeus, P.O. Box 41046, Athens 12201, Greecejkald@teipir.gr

D. Zafirakis, K. Kavadias

Laboratory of Soft Energy Applications & Environmental Protection, TEI of Piraeus, P.O. Box 41046, Athens 12201, Greece

E. Kondili

Optimisation of Production Systems Laboratory, Department Mechanical Engineering, TEI of Piraeus, P.O. Box 41046, Athens 12201, Greece

J. Sol. Energy Eng 131(2), 021010 (Apr 07, 2009) (12 pages) doi:10.1115/1.3097271 History: Received December 11, 2007; Revised September 01, 2008; Published April 07, 2009

The electrification of autonomous electrical networks is in most cases described by low quality of electricity available at very high production cost. Furthermore, autonomous electrical networks are subject to strict constraints posing serious limitations on the absorption of renewable energy sources (RES)-based electricity generation. To bypass these constraints and also to secure a more sustainable electricity supply status, the concept of combining photovoltaic (PV) power stations and energy storage systems comprises a promising solution for small scaled autonomous electrical networks, increasing the reliability of the local network as well. In this context, the present study is devoted in developing a complete methodology, able to define the size of an autonomous electricity generation system, based on the maximum available solar potential exploitation at minimum electricity generation cost. In addition special emphasis is given in order to select the most cost-efficient energy storage configuration available. According to the calculation results obtained, one may clearly state that an optimum sizing combination of a PV generator along with an appropriate energy storage system may significantly contribute on reducing the electricity generation cost in several island electrical systems, providing also abundant and high quality electricity without the environmental and macro-economic impacts of the oil-based thermal power stations.

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Copyright © 2009 by American Society of Mechanical Engineers
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Figures

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Figure 1

Variation of seasonal electricity consumption for small remote islands

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Figure 2

Daily electricity consumption variation for small remote islands

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Figure 3

Solar potential and load demand seasonal distribution for a typical small island

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Figure 4

Proposed electricity generation configuration for small autonomous networks

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Figure 5

The contribution of the PV generator on the energy balance of a PV-ESS based autonomous electricity generation system

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Figure 6

The PV-energy surplus for a PV-ESS based autonomous electricity generation system

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Figure 7

The participation of the energy storage system on the energy balance of a PV-ESS based autonomous electricity generation system

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Figure 8

Energy balance analysis for representative PV-ESS based autonomous electricity generation configurations

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Figure 9

Electricity production cost of representative PV-ESS based autonomous electricity generation systems

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Figure 10

The contribution of the existing APS on the energy balance of typical PV-ESS based autonomous electricity generation systems. The impact of the energy storage technology applied for do=12 h.

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Figure 11

The impact of the selected energy autonomy on the electricity production cost of representative PV-ESS based autonomous electricity generation configurations

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Figure 12

Electricity generation cost distribution versus PV-generator rated power values of representative PV-ESS based autonomous electricity generation configurations for do=12 h

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