Publications by Theodoros Kyriakidis

A mixed-signal computer architecture and its application to power system problems

Radical changes are taking place in the landscape of modern power systems. This massive shift in the way the system is designed and operated has been termed the advent of the ``smart grid''. One of its implications is a strong market pull for faster power ...

EPFL2015

Mixed-signal power system emulator extension to solve unbalanced fault transient stability analysis

Sidi-Rachid Cherkaoui, Maher Kayal, Theodoros Kyriakidis, Guillaume Olivier Lanz

This paper presents the extension of a platform originally devoted to symmetrical transient stability analysis, into the domain of unbalanced faults. The aim of this solver is to increase the speed of dynamic stability assessment for power systems. It is b ...

IEEE2014

Pipelined Numerical Integration on Reduced Accuracy Architectures for Power System Transient Simulations

Maher Kayal, Georgios Lilis, Sidi-Rachid Cherkaoui, Theodoros Kyriakidis, Guillaume Olivier Lanz

This work concerns a dedicated mixed-signal power system dynamic simulator. The equations that describe the behavior of a power system can be decoupled in a large linear system that is handled by the analog part of the hardware, and a set of differential e ...

IEEE2014

On the effect of integration algorithms on reduced accuracy computational architectures

Maher Kayal, Georgios Lilis, Sidi-Rachid Cherkaoui, Theodoros Kyriakidis, Guillaume Olivier Lanz

2014

A DC power flow extension

Sidi-Rachid Cherkaoui, Maher Kayal, Theodoros Kyriakidis

In this work an extension of the well-known DC power flow method is presented. A normal DC power flow of the system is executed to determine voltage angles and a novel derivation of voltage amplitudes is devised. The latter is rigorously formulated and eig ...

IEEE2013

Distributed real-time dynamic security assessment using intelligent techniques

Sidi-Rachid Cherkaoui, Maher Kayal, Theodoros Kyriakidis, Karthik Kumar

In real time scenario, transmission (of power) in power systems may not be always ideal i.e. they may be interrupted. As a result, the synchronization among the power generating modules may be lost. Loss of synchronization has a direct effect on the stabil ...

IEEE2013

An Ultra-High Speed Emulator Dedicated to Power System Dynamics Computation Based on a Mixed-Signal Hardware Platform

Maher Kayal, Sidi-Rachid Cherkaoui, Laurent Fabre, Ira Nagel, Theodoros Kyriakidis, Guillaume Olivier Lanz, Denis Sallin

This paper presents an ultra-high speed hardware platform dedicated to power system dynamic (small signal) and transient (large signal) stability. It is based on an intrinsic parallel architecture which contains hybrid mixed-signal (analog and digital) cir ...

IEEE Institute of Electrical and Electronics Engineers2013

A 3D architecture platform dedicated to high-speed computation for power system

Maher Kayal, Sidi-Rachid Cherkaoui, Laurent Fabre, Ira Nagel, Theodoros Kyriakidis, Guillaume Olivier Lanz, Denis Sallin

This paper presents an innovative 3D hardware architecture for power system dynamic and transient stability. Based on an intrinsic parallel architecture by means of mixedsignal circuits (analog and digital) it overcomes the speed of numerical simulators fo ...

2013

A Transient Stability Assessment Method using Post-Fault Trajectories

Maher Kayal, Sidi-Rachid Cherkaoui, Theodoros Kyriakidis, Guillaume Olivier Lanz

Transient Stability Assessment (TSA) is the process in which the stability of a system is characterized qualitatively or quantitatively. The TSA algorithm presented in this paper is derived from the well-established Single Machine Equivalent (SIME) method ...

2013