Microgrids represent a new and flexible form of electrical networks. This form is based on the use of Distributed Generators which are connected to a microgrid through Voltage Source Inverters (VSI). In this paper, we propose a nonlinear controller that allows the regulation of the output voltage and frequency of a VSI. The system consists of a VSI and an LC filter associated to a coupling indu...

The need to restore and keep the grid running or fast restoration during emergencies such as extreme weather conditions is quite apparent given reliance of other infrastructure on electricity. One promising approach electricity use locally available energy resources system form isolated microgrids. In this paper, we present a black start method that forms islanded microgrids after blackout. mas...

A microgrid (MG) is a discrete energy system that can operate either in parallel with or independently from a main power grid. It is designed to enhance reliability, carbon emission reduction, diversification of energy sources, and cost reduction. When a power fault occurs in a grid, an MG operates in an islanded manner from the grid and protects its power generations and loads from disturbance...

For islanded microgrids, droop-based control concepts have been developed both in single and three-phase variants. The three-phase controllers often assume a balanced network; hence, unbalance sharing and/or mitigation remains a challenging issue. Therefore, in this paper, unbalance is considered in a three-phase islanded microgrid in which the distributed generation (DG) units are operated by ...

The aim of this research study has been to design a gain scheduling (GS) digital controller in order to control the voltage of an islanded microgrid in the presence of fast varying loads (FVLs), and to compare it to a robust controller. The inverter which feeds the microgrid is connected to it through an inductance-capacitor-inductance (LCL) filter. The oscillatory and nonlinear behaviour of th...

Islanded microgrids have low inertia due to a large penetration of non-inertial inverter based power sources. In such systems, the primary frequency controller (PFC) faces issue higher rate change (RoCoF) and peak deviation in case sudden load or generation loss. The control becomes more challenging as variation different sources is not synchronized. This paper proposes model for dynamics an is...