A microgrid is characterized by the integration of distributed energy resources and controllable loads in a power distribution network. Such integration introduces new, unique challenges to microgrid management that have never been exposed to traditional power systems. To accommodate these challenges, it is necessary to redesign a conventional Energy Management System (EMS) so that it can cope ...

When a microgrid is mainly supplied by renewable energy sources (RESs), the frequency deviations may deteriorate significantly the power quality delivered to the loads. This paper proposes a frequency-based control strategy, ensuring the frequency among the strict limits imposed by the Standard EN 50160. The frequency of the microgrid common AC bus is determined by the energy storage converter,...

Direct Current (DC) microgrids are expected to become larger due to the rapid growth of DC energy sources and power loads. As the scale of the system expends, the importance of voltage control will be increased to operate power systems stably. Many studies have been performed on voltage control methods in a DC microgrid, but most of them focused only on a small scale microgrid, such as a buildi...

The integration of renewable energy resources to utility grid calls for selection suitable storage system store generated with reliable supply demand and efficient control smooth the grid. Battery is most common system. Combining a supercapacitor it makes performance better during transients. This paper proposes hybrid battery reduce transient power fluctuations improve life span by reducing ch...

Considering the advantages of DC microgrids, the extension of the conventional AC distribution grid can be implemented using a DC microgrid. This justifies the realization of a hybrid AC/DC microgrid. In the present study, a new global solution is presented to improve the power quality and to fully compensate the reactive power of an AC microgrid using DC bus capacity while introducing a new de...

This work introduces modified backstepping methods to design controllers for neutral point clamped (NPC) converters interfacing a DC/AC microgrid. The are derived from proper converter model, represented in dq coordinates, and designed regulate the DC voltage balance two NPC capacitor voltages through offset sinusoidal pulse width modulation (SPWM) carriers. averaged separated dynamics also enf...

Variation of frequency and voltage by load changes in a microgrid is a challenge in droop control method. Centralized restoration frequency or voltage in a microgrid requires communication link and therefore affects the advantage of decentralized droop control such as reliability, simplicity and inexpensiveness. This paper proposes a decentralized method that restores the frequency of a microgr...

Recently, Direct current (DC) microgrids have gained immense popularity due to their dependable and efficient framework, as well high transmission efficiency low electric power conversion. However, the non-linear nature of Renewable Energy Sources (RESs), increased presence electronic devices sudden load changes leads onset stability issues in DC microgrid. Thereby, a microgrid structure includ...

We consider the problem of commanding the electronic power interfaces of the microgenerators in a low voltage microgrid for the task of optimal reactive power compensation. In this work, we analyze the convergence of the strategy proposed by Tenti et al. (2012). The proof of convergence gives some additional insight on the behavior of the algorithm and allows the characterization of its rate of...