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Sustainability 2016, 8(8), 748;

Intelligent Control of a Distributed Energy Generation System Based on Renewable Sources

Department of Automatic Control and Electrical Engineering, “Dunarea de Jos” University of Galati, Galati 800008, Romania
Department of Telecommunication and Systems Engineering, Universitat Autonoma de Barcelona, Bellaterra, Barcelona 08193, Spain
Author to whom correspondence should be addressed.
Academic Editor: Andrew Kusiak
Received: 8 June 2016 / Revised: 25 July 2016 / Accepted: 29 July 2016 / Published: 4 August 2016
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The control of low power systems, which include renewable energy sources, a local network, an electrochemical storage subsystem and a grid connection, is inherently hierarchical. The lower level consists of the wind energy sources (power limitation at rated value in full load regime and energy optimization in partial load regime) and photovoltaic (energy conversion optimization) control systems. The present paper deals with control problem at the higher level and aims at generating the control solution for the energetic transfer between the system components, given that the powers of the renewable energy sources and the power in the local network have random characteristics. For the higher level, the paper proposes a mixed performance criterion, which includes an energy sub-criterion concerning the costs of electricity supplied to local consumers, and a sub-criterion related to the lifetime of the battery. Three variants were defined for the control algorithm implemented by using fuzzy logic techniques, in order to control the energy transfer in the system. Particular attention was given to developing the models used for the simulation of the distributed energy system components and to the whole control system, given that the objective is not the real-time optimization of the criterion, but to establish by numerical simulation in the design stage the “proper” parameters of the control system. This is done by taking into account the multi-criteria performance objective when the power of renewable energy sources and the load have random characteristics. View Full-Text
Keywords: hierarchical control; fuzzy control; storage system; renewable energy hierarchical control; fuzzy control; storage system; renewable energy

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Vlad, C.; Barbu, M.; Vilanova, R. Intelligent Control of a Distributed Energy Generation System Based on Renewable Sources. Sustainability 2016, 8, 748.

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