Abstract
In this chapter the most significant characteristics and functionalities of an energy management system (EMS) for microgrids are introduced. For this, the definitions of hierarchical control layers are considered. First, the main concepts and modules of the hierarchical control structure of a generalized EMS are presented. Then, energy management function is represented as an optimization problem, described as the simultaneous solution of both, a unit commitment problem and an economic load dispatch problem. An extension of the energy management problem is also formulated based on an optimal power flow. Second, the advantages and disadvantages of using either a centralized or a decentralized EMS approach are discussed. Finally, since the energy management problem is represented as an optimization problem, the most common methodologies and solution algorithms used in the specialized literature are discussed, including metaheuristics, mixed-integer linear approximations, and nonlinear approaches, as well as software tools for implementing models and simulations.
Research grants FAPESP 2015/09136-8 and 2015/12564-1.
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Notes
- 1.
Note that Eqs. (7.5), (7.6), and (7.7) are equality constraints with linear and quadratic variables; hence, those equations are considered as convex quadratic constraints. However, as discussed in this section, the transformation of the terms \( {I}_{ij}^2 \) and \( {v}_i^2 \) into single variables will produce a linear equivalent expressions.
- 2.
These kind of optimization problems are known as mixed-integer second-order cone programming problems (MISOCP).
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Vergara, P.P., López, J.C., Rey, J.M., da Silva, L.C.P., Rider, M.J. (2019). Energy Management in Microgrids. In: Zambroni de Souza, A., Castilla, M. (eds) Microgrids Design and Implementation. Springer, Cham. https://doi.org/10.1007/978-3-319-98687-6_7
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