Islam el-sayed

• PhD
• Software Engineer at University of Oviedo

p>In recent years, there has been a growing trend in research on smart contract applications. Smart contracts potential in the energy landscape is visible in their major applications such as peer-to-peer energy trading, electric vehicle charging, energy market management, and many more. Many studies have been conducted that produced a lot of litera...

p>In recent years, there has been a growing trend in research on smart contract applications. Smart contracts potential in the energy landscape is visible in their major applications such as peer-to-peer energy trading, electric vehicle charging, energy market management, and many more. Many studies have been conducted that produced a lot of litera...

Synopsis In this article we aim to provide useful insights about the use of blockchain technology in the smart power systems. We will describe (1) Blockchain perception and overview of its general applications in different fields including power sector (2) Motivation and drivers for the use of blockchain technology in the smart power systems (3) In...

The work presented in this paper describes a multi-issue negotiation protocol between active consumers and a management platform in order to establish load coordination in a highly congested network. The multi-issue negotiation protocol considers simultaneously the consumption interval, the price, and the size of the energy packages, which is the m...

For the validation of vehicular Electrical Distribution Systems (EDS), engineers are currently required to analyze disperse information regarding technical requirements, standards and datasheets. Moreover, an enormous effort takes place to elaborate testing plans that are representative for most EDS possible configurations. These experiments are fo...

Simulation tools are essential to design the infrastructure and plan the trains operations of electrical railway systems. Traditionally, the train model (that estimates the electrical, mechanical and kinematical behaviors of the vehicles) and electrical network model (that estimates the electrical behavior of the energy supply network) are develope...

Simulation tools are crucial to efficiently design the infrastructures and operations of DC electrical railway systems, including potential innovative technologies such as reversible traction power substations and energy storage systems. For this purpose, it is essential to accurately estimate the evolution of the voltage and power flows within the...

Contrary to other in‐car engineering systems where the use of simulation tools is highly extended prior to a prototyping stage, the simulation of vehicular electrical distribution systems (EDSs) is not still a common practice as manufacturers so far have mainly relied on laborious empirical procedures for technical validation. However, to provide f...

The present study describes and analyses a set of quasi‐static railway power systems models and simulations considering on‐board and off‐board energy storage systems but also reversible and non‐reversible substations and regenerative braking trains. The advantages and drawbacks of each technology are discussed. Then, several case studies considerin...

This work shows the development of a software tool that provides realistic operation power profiles in elevators for residential and public buildings applications. The implemented tool carries out a kinematic, dynamic and energetic analysis of the system, as a function of operational variables in the system. Therefore, the final load profile is a f...

In this paper, a decoupled model of a train including an on-board hybrid accumulation system is presented to be used in DC traction networks. The train and the accumulation system behavior are modeled separately, and the results are then combined in order to study the effect of the whole system on the traction electrical network. The model is desig...

In this work, a simplified model of a 2x25kV bi-level traction power system for feeding high-speed trains is presented. A Modified Nodal Analysis (MNA) based algorithm for solving the system with and adaptive damping factor is also explained. The main novelties of this work are the inclusion of train protections (over-current) and (over-voltage) in...

This work presents a comprehensive set of steady state models to be included in power flow simulation studies of DC railway networks. This simulation framework covers all important aspects and features of each element of modern DC railways. The proposed models are simplified to achieve the maximum simulation speed while keeping the required accurac...

In this paper, a new procedure based on a back- ward/forward sweep (BFS) algorithm for solving power flows in weakly meshed dc traction networks is presented. The proposed technique is able to consider the trains as nonlinear and non- smooth (nondifferentiable) voltage-dependent loads or generators. This feature permits the inclusion of the trains’...

This paper analyzes two types of effects caused by the fundamental current in saliency-tracking-based techniques for sensorless control of three-pole active magnetic bearings, i.e., saturation and insufficient spectral separation of the fundamental current command during transients. Injection of a high-frequency signal superimposed to the fundament...