Microgrids can significantly improve the utilization of distributed generation (DG) and the reliability of the power supply. However, in the grid-tied operational mode, the interaction between the microgrid and the distribution network cannot be ignored. The paper proposes an equivalent modeling method for the microgrid under grid-tied mode based on a characteristic model. It can simplify the m...

A Key component to future smart grids may be a microgrid system capable of integrating generation, load, and storage assets into an autonomous power system entity. A microgrid is intrinsically distributive in nature. In order to improve performance of a microgrid, a distributed and cooperative control is required. Agent technology is one of techniques for achieving the objectives of distributed...

The electric power sector due to the great expansion of distributed generation has been undergoing many transformations. Within this context a new concept is being widely discussed: microgrid. A microgrid formed by set electrical loads, sources and energy storage elements, can operate in grid-connected islanded mode. However, mode low short-circuit power, presence generators electronic converte...

In this paper, the voltage and frequency regulation of microgrid with unknown disturbances non-linear dynamics was studied. The disturbance observer designed sliding mode control (SMC) method used to realize secondary frequency. First, a distributed protocol reduce communication burden between generators solve deviations. Second, consensus for designed, based on idea multi-agent consensus, indi...

This work proposes a novel mixed-integer linear programming model to address the medium-term reinforcement planning for active distribution networks, taking into account multiple investment options and CO2 emission limits. The plan jointly includes (i) replacement of overloaded conductors, (ii) installation voltage control equipment such as regulators capacitor banks, (iii) distributed energy r...

The objective of this paper is to present novel control strategies for MicroGrid operation, especially in islanded mode. The control strategies involve mainly the coordination of secondary load-frequency control by a MicroGrid Central Controller that heads a hierarchical control system able to assure stable and secure operation when the islanding of the MicroGrid occurs and in load-following si...

The operation of energy storage systems (ESSs) in power where variable renewable sources (VRESs) and ESSs must contribute to securing the supply, can be considered as an arbitrage against scarcity. value using stored instantly balanced its potential future risk This paper proposes a multi-stage stochastic programming model for microgrids with VRESs, thermal generators that is divided into short...

An extreme flexibility of a microgrid operation requires general, integrated and hierarchical proper management and control systems. A wide variety of communication technologies from communication medias, communication protocols to sensors and algorithms are available for microgrid applications. The requirements of communication capabilities differ with the varying microgrid architectures, phys...