Coordinated management of low voltage power networks with photovoltaic energy sources

Author(s):Brenda Rojas, Mónica Alonso, Hortensia Amarís, Lorena González
Universidad Carlos III deMadrid, Avda de la Universidad nº30, Leganés, 28911, Spain
International Journal of Smart Grid and Clean Energy, vol. 5, no. 4, October 2016: pp. 213-220
ISSN: 2315-4462 (Print)
ISSN: 2373-3594 (Online)
Digital Object Identifier: 10.12720/sgce.5.4.213-220

Abstract: Over the last decades, active power networks have reached great attention due to the incorporation of distributed energy resources into low voltage power systems. In this paper, a decentralized energy management strategy is proposed as an efficient way to minimize both active power losses and voltage profile deviation of an distribution power network with photovoltaic solar farms, and also at the same time, aims to improve the reliability and the security of supply. The coordinated energy management concept relies on a two-step optimization approach based on genetic algorithms (GA) and MINLP, in which a multi-objective function is used which takes into account reliability and operational technical constraints in its formulation. The suitability of the proposed methodology is tested on an existing low voltage power system, in which two aspects are considered: firstly, determining the optimal allocation of PV units and secondly, establishing the optimal reschedule of the active power of the generation units participating in the energy mix and minimizing both the real power losses and voltage deviation of the entire power system.

Keywords: Renewable energy, PV plants, genetic algorithms, smart grids

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