This paper presents a control method for the Doubly-fed Induction Generator connected to a dc link through a diode bridge on the stator. In this system, the rotor is fed, at the slip frequency, by a PWM electronic converter and the stator is directly connected to the dc link using a simple diode bridge. The cost of power electronics is reduced in this system when compared with the classic DFIG ...

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...

In this paper a novel distributed control algorithm for current sharing and voltage regulation in Direct Current (DC) microgrids is proposed. The DC microgrid is composed of several Distributed Generation units (DGus), interfaced with Buck converters, and current loads. The considered model permits an arbitrary network topology and is affected by unknown load demand and modelling uncertainties....

Hybrid AC/DC microgrids facilitate the procedure of DC power connection into the conventional AC power system by developing the distributed generations (DGs) technologies. The conversion processes between AC and DC electrical powers are more convenient by hybrid systems. In this paper, an energy management system (EMS) for a hybrid microgrid network is proposed due to the optimal utilization of...

DC microgrids encounter the challenges of constant power loads (CPLs) and pulsed (PPLs), which impose requirements fast dynamics, large stability margin, high robustness that cannot be easily addressed by conventional linear control methods. This necessitates implementation advanced technologies in order to significantly improve robustness, dynamic performance, flexibility system. article prese...

Microgrids have arisen as an alternate solution to the problem of power generation in distributed energy. Compared ac microgrids, dc microgrids (DC MGs) are superior terms system efficiency, quality, affordability, and ease control. For integration renewable energy into electronic converters required. When electronics tightly regulated, they behave a constant load (CPL) which exhibits negative ...