Rotor speed-free estimation of the frequency of the center of inertia

F Milano - IEEE Transactions on Power Systems, 2017 - ieeexplore.ieee.org
This letter proposes a formula to estimate the frequency of the center of inertia based
exclusively on measures of bus frequencies, obtained, for example, from phasor …

[HTML][HTML] A novel approach to model a gas network

A Ekhtiari, I Dassios, M Liu, E Syron - Applied Sciences, 2019 - mdpi.com
The continuous uninterrupted supply of Natural Gas (NG) is crucial to today's economy, with
issues in key infrastructure, eg, Baumgarten hub in Austria in 2017, highlighting the …

Analytic loss minimization: theoretical framework of a second order optimization method

IK Dassios - Symmetry, 2019 - mdpi.com
In power engineering, the Y bus is a symmetric N× N square matrix describing a power
system network with N buses. By partitioning, manipulating and using its symmetry …

Strength assessment of electric power systems containing inverter-based distributed generation

SO Sanni, MF Akorede, GA Olarinoye - Electric Power Systems Research, 2022 - Elsevier
Large-scale penetration of inverter-based distributed generation (IBDG) systems such as
wind and solar PV plants into conventional power systems is raising concerns for traditional …

[HTML][HTML] Calculating nodal voltages using the admittance matrix spectrum of an electrical network

I Dassios, A Keane, P Cuffe - Mathematics, 2019 - mdpi.com
Calculating nodal voltages and branch current flows in a meshed network is fundamental to
electrical engineering. This work demonstrates how such calculations can be performed …

Identifying interaction boundary of inverter-based generation in assessing system strength of power grids using relative electrical distance concept

SO Sanni, OO Mohammed, AI Abdullateef… - Renewable Energy …, 2024 - Elsevier
The increasing use of inverter-based generation (IBG) in power grids raises concern about
system strength. This is partly due to the inherent interactions among multiple IBGs in close …

[HTML][HTML] A discrete model for force-based elasticity and plasticity

I Dassios, G Tzounas, F Milano, A Jivkov - Journal of Computational and …, 2024 - Elsevier
The article presents a mathematical model that simulates the elastic and plastic behaviour of
discrete systems representing isotropic materials. The systems consist of one lattice of …

[PDF][PDF] On the causality of singular systems of difference equations of first and fractional order

N Apostolopoulos, F Ortega - Dynamics of continuous, discrete …, 2019 - researchgate.net
We consider two type of systems, a linear singular discrete time system and a linear singular
fractional discrete time system whose coefficients are square constant matrices. By …

Voltage differences as functions of a matrix eigensystem

I Dassios, G Tzounas, F Milano - Sustainable Energy, Grids and Networks, 2024 - Elsevier
We firstly consider an electrical network that consists of multiple subnetworks. We refer to
some basic definitions which relate net current flows and voltages, the edges and nodes …

Frequency participation factors

A Ortega, F Milano - IEEE Transactions on Power Systems, 2018 - ieeexplore.ieee.org
This paper discusses two quantitative and complementary approaches to evaluate the
participation of synchronous generators and interconnection buses on local bus frequency …