Abstract
The development of microgrids is of great interest to facilitate the integration of distributed generation in electricity networks, improving the sustainability of energy production. Microgrids in DC (DC-MG) provide advantages for the use of some types of renewable generation and energy storage systems, such as batteries. In this article, a possible practical implementation of an isolated DC-MG for residential use with a cooperative operation of the different nodes is proposed. The main criterion is to achieve a very simple design with only primary control in a residential area. This application achieves a simple system, with low implementation costs, in which each user has autonomy but benefits from the support of the other users connected to the microgrid, which improves its reliability. The description of the elements necessary to create this cooperative system is one of the contributions of the work. Another important contribution is the analysis of the operation of the microgrid as a whole, where each node can be, arbitrarily, a consumer or an energy generator. The proposed structures could promote the use of small distributed generation and energy storage systems as the basis for a new paradigm of a more sustainable electricity grid of the future.
Highlights
The operation of the network depends on the collaboration of all the nodes, so the name cooperative DC microgrid (DC-MG) was proposed
This is intended to simplify the design of this type of networks that can facilitate the use of distributed renewable generation of individual type, but with the support of the network to achieve better guarantees of reliability
This type of facility could be the basis for future distribution networks, the purpose of which would be to link these facilities together in order to achieve bottom-up network development, in contrast to the classic network structure of electric power systems that develop from top to bottom
Summary
Electrical networks have evolved, from their origin, to the current large interconnected networks. There are several factors in current electrical installations that allow proposing an important change in this approach [2]. Transport networks have been aging and becoming saturated, while the demand for power has not stopped growing [3]. The huge costs required for the construction of large power plants or long transport lines have sparked interest in new structures of smaller size and more flexible [4]. This is how concepts such as microgrids (MGs) emerge
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