Advantages of minimizing energy exchange instead of energy cost in prosumer microgrids

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Advantages of minimizing energy exchange instead of energy cost in prosumer microgrids

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Title: Advantages of minimizing energy exchange instead of energy cost in prosumer microgrids
Author: González Romera, Eva; Ruiz Cortés, Mercedes; Milanés Montero, María Isabel; Barrero González, Fermín; Romero Cadaval, Enrique; Lopes, Rui Amaral; Martins, João Francisco Alves
Abstract: Las microrredes de prosumidores son un enfoque moderno dentro del concepto de red inteligente, como una forma de aumentar la penetración de energías renovables distribuidas dentro de los sistemas de energía de una manera eficiente y sostenible. La administración individual de un solo consumidor ha sido discutida previamente en la literatura, generalmente basada en la optimización de ganancias económicas. En este documento, se proponen dos enfoques novedosos: en primer lugar, una función objetivo diferente, relativa al desajuste entre los generados y la potencia demandada, se prueba y compara con la función objetivo clásica basada en el precio de la energía, mediante un método de algoritmo genético; en segundo lugar, este procedimiento de optimización se aplica a la programación coordinada de las baterías de todos los prosumidores que componen una comunidad, en lugar de una sola, que mejor se adapta al concepto de microred. Estos enfoques se prueban en una microred con dos prosumidores domésticos, en el contexto de la regulación española para el autoconsumo. Los resultados muestran un desempeño notablemente mejor de la función objetivo de desajuste y el programa coordinado, en términos de autoconsumo y tasas de autosuficiencia, intercambios de energía y energía con la red principal, degradación de la batería e incluso beneficios económicos.Microgrids of prosumers are a trendy approach within the smart grid concept, as a way to increase distributed renewable energy penetration within power systems in an efficient and sustainable way. Single prosumer individual management has been previously discussed in literature, usually based on economic profit optimization. In this paper, two novel approaches are proposed: firstly, a different objective function, relative to the mismatch between generated and demanded power, is tested and compared to classical objective function based on energy price, by means of a genetic algorithm method; secondly, this optimization procedure is applied to batteries’ coordinated scheduling of all the prosumers composing a community, instead of single one, which better matches the microgrid concept. These approaches are tested on a microgrid with two household prosumers, in the context of Spanish regulation for self-consumption. Results show noticeably better performance of mismatch objective function and coordinated schedule, in terms of self-consumption and self-sufficiency rates, power and energy interchanges with the main grid, battery degradation and even economic benefits.
URI: http://hdl.handle.net/10662/9457
Date: 2019


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