The aim of this paper is to propose a coordinated control strategy between grid-forming converters equipped with energy storage, and hydro generators facilitate frequency support from the in future power systems. In way, it possible take advantage fast dynamic properties converter system, at same time minimize storage requirements associated system. proposed tuning criterion for controller faci...

The droop control strategy is the most common approach for microgrids control but its application is limited due to frequency deviation following a load change. Complementary control strategy has then been proposed to solve the problem using a communication network. However, under this strategy, regular loads profile produces a continuous change of output power of all distributed generators (DG...

As the integration of Distributed Energy Resources (DERs) in modern grids is increasing, the microgrid concept has been established. In the case of converter-dominated microgrids without communication links, the droop control method is mainly adopted in the primary control level. Normally, the economic operation of the microgrid is incorporated in the secondary control level, requiring communic...

One of the major and more challenging problem that is going to affect the future electricity system is the one relate to the frequency stability and support from generating units. In traditional power networks frequency support were transiently provided by the rotating mass of the generator (directly connected to the grid) while the steady state contribution to frequency is provided by a droop ...

Increasing DC loads along with DC nature of distributed energy resources (DERs) raises interest to DC microgrids. Conventional droop/non-droop power-sharing in microgrids suffers from load dependent voltage deviation, slow transient response, and requires the parameters of the loads, system and DERs connection status. In this paper, a new nonlinear decentralized back-stepping control strategy f...

In islanded ac microgrids, conventional primary control uses inner−loop cascaded linear controller and outer−loop droop to realize local voltage regulation power sharing. However, it has a poor dynamic performance fast rate of frequency change following disturbances. This paper addresses these issues by proposing modified virtual synchronous generator (VSG) control. A Laguerre functions−based d...

Grid-forming converters (GFMCs) provide voltage support and other grid services, such as inertia droop, in more-electronics power systems. The GFMCs with small droop coefficients or connected to the through a impedance may have fast loop, which leads serious conflicts inner ac control resulting oscillations even instability. To address this problem, an extremely loop should be expected for GFMC...

A dynamic phasor model for lowand medium-voltage distribution grids is presented. This model accurately represents the transient dynamics of this type of grid, and its low order makes it well suited for control design. A novel fixed-structure, robust control design method based on convex optimization is then used to design a decentralized low-order controller that shows a significantly improved...

High penetration of rooftop photovoltaic (PV) systems in distribution feeders can give rise to overvoltage during peak generation hours. A well-known solution for this problem is Volt-VAR control method, which PV inverters mitigate the by reactive power absorption. The conventional scheme calculates reference based on a limited bandwidth V-Q droop controller. Although method capable steady-stat...

Modern power systems require increasing intelligence and flexibility in the control and optimization to ensure the capability of maintaining balance between generation and load under violent disturbances. There are several inverter interfaced distributed generations (IIDGs) with local and global control loops in a microgrid (MG). Voltage and frequency of MGs are strongly impressionable from the...