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About

About

I have a Bachelor of Science in electrical power engineering from Cairo University, Egypt. I also hold a Joint Master's degree in the Integration of Wind power in the power grid from the Norwegian University of Science and Technology (NTNU), Norway, and the Technical University of Denmark (DTU), Denmark.


Currently, I am conducting my doctoral degree in electrical power engineering at the Faculty of Engineering of Porto University (FEUP), Portugal. I am also working as a researcher at the institution for Systems and Computer Engineering, Technology and Science (INESC TEC) in Porto, Portugal.


My main specializations are electric power systems, power electronics, control, Hydrogen Electrolyzers, and renewables (modeling, control, and design).

Interest
Topics
Details

Details

  • Name

    Abdelrahman Elhawash
  • Role

    Research Assistant
  • Since

    01st March 2022
002
Publications

2023

A new adaptive lead-lag control scheme for high current PEM hydrogen electrolyzers

Authors
Elhawash, AM; Araujo, RE; Lopes, JAP;

Publication
2023 IEEE VEHICLE POWER AND PROPULSION CONFERENCE, VPPC

Abstract
This paper aims at researching the design of a current controller for an interleaved Buck converter used to feed a high current 5 kW Polymer electrolyte membrane (PEM) electrolyzer representing a module stack level. The main challenge is to design a robust controller that ensures operation over a wide range of electrolyzer operating points while guaranteeing control requirements and current sharing between the converters. The developed control scheme ensures responsiveness to the requirements of the grid's ancillary services and control over the dynamics of the electrolyzer. MATLAB/Simulink simulation results with dSPACE compatible models are presented to validate the lead-lag controller, designed using root locus, achieving a ripple current of 0.1 A, a 0.3% steady-state error, and a settling time of 50 ms for a step response.

2022

ULTRA-LOW NOISE, HIGH-SENSITIVITY MEMS ACCELEROMETER FOR SATELLITE GRAVIMETRY

Authors
Garcia, S; Elhawash, M; Cabral, J; Hormigo, T; da Encarnação, T; Alves, S; Dias, A;

Publication
2022 Solid-State Sensors, Actuators and Microsystems Workshop, Hilton Head 2022

Abstract
Satellite gravimetry requires sub-ng acceleration measurement at frequencies below 100mHz. To bring the performance of a MEMS accelerometer closer to this level, one must decrease noise sources and maximize sensitivity (to decrease input-referred electronic noise). Electrostatic pull-in based operation has great potential for high sensitivity since it relies on time transduction. Devices were fabricated with maximized proof mass (170mg over a 13x14mm2 footprint) and tuned damping coefficient (trade-off between noise and sensitivity – pull-in operation requires low Q-factors). Novel stopper designs and caps limit both in-plane and out-of-plane displacements. Devices tested using pull-in voltage-based transduction showed sensitivity of 218 V/g. © 2022 TRF.