2023-08-29 22:00:00
A collective self-consumption operation (ACC) allows producers of renewable energy to sell all or part of their production to consumers located nearby and connected to the same distribution network. This concept of community of energy presents a double interest. On the one hand, it allows consumers to reduce their expenses by buying electricity at an attractive price compared to their usual supplier and, on the other hand, it allows producers to improve the profitability of their investments by selling electricity at a rate higher than that of an injection into the network.
The development of a collective self-consumption operation requires the prior definition of the terms of governance and operation between the various participants and the organizing legal person (PMO) in charge of managing the operation. Among these methods, the question of the distribution of energy between the various participants is a central element. This allocation is carried out according to a distribution key, defined before the start of the operation, in which energy but also economic criteria are generally considered. An optimization of this distribution key appears necessary to maximize the economic interest for all participants.
In addition, the various energy production and storage equipment present in the operation must be sized as accurately as possible in relation to energy needs, while ensuring optimal economic profitability for the various participants. Optimization of their sizing must therefore be carried out during the study phase of the project. The optimality of a dimensioning with regard to technical and economic considerations is linked to the way in which the system is managed, both at the individual level and at the collective level, since the energy management strategies define the income and expenditure community partners. Thus, the design phase must jointly take into account the optimization of dimensioning and the optimization of energy management.
The purpose of this article is to present a methodological approach for the co-optimization of sizing and energy management, at the individual level (i.e. inside the buildings participating in the operation) and at the collective level, with a view to defining a range of economically viable solutions. The method presented is then applied to a case study in order to illustrate the results that can be obtained, considering a hypothetical collective self-consumption operation in an industrial-port area. An analysis of the results obtained is proposed from an energy but also an economic angle, making it possible to show the interest of setting up a collective self-consumption operation for the various participants. A sensitivity analysis is also performed to show the impact of certain technical and economic assumptions on the results.
Key points
Area: Local energy production and management
Degree of technology diffusion: Growth
Technologies involved: Photovoltaic solar panels, storage (batteries), hydrogen
Areas of application: Energy communities
Main French players:
Competitiveness clusters: S2E2
Competence centers – Industrial: ENEDIS, EDF, Akajoule, Enogrid, Enercoop
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