Mohamed Ezzat

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i-10 index

Research Field

The Optimal Planning and Operation of Energy Storage Systems for Minimizing Cost of Energy Losses and Maximizing Arbitrage Benefit in the Presence of Wind Generation

Electric Power Components and Systems (2018)

Almoataz Y. Abdelaziz Mohamed Ezzat Mahmoud M. Othman Ahmed Mahmoud

Energy storage systems are one of the recent technologies utilized in order to achieve the stability and reliability of the power system with the integration of renewable energy sources. Energy storage systems can enhance system performance by means of the proper energy management. First, this paper presents a probabilistic modeling strategy for wind power and system demand. The modeling strategy utilizes Monte Carlo simulations to accurately consider the intermittent nature of wind generation and demand. Second, a linear programming optimization approach is performed to maximize system arbitrage benefits through optimizing operation of energy storage systems. Finally, two novel algorithms for optimal allocation of renewable energy resources and energy storage elements are proposed. The proposed algorithms are dependent on Big Bang Big Crunch optimization method and integrating the results of the modeling strategy with the optimization problem. The presented algorithms aim to minimize the net present value of energy loss cost in distribution systems. The proposed modeling strategy and optimization algorithms are implemented in MATLAB environment and tested on IEEE 33 bus system. Several case studies are done and the subsequent discussions show the effectiveness of the proposed algorithms.

10.1080/15325008.2018.1461149

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Citations (6)

Assessment of the Need for Cardiac Support Using Custodiol HTK Cardioplegia versus Traditional Crystalloid Cardioplegia

The Egyptian Journal of Hospital Medicine (2023)

Ibrahim Fatma Ibrahim Amin Mohamed Ezzat Emad Mohamed El-Din Abdel-Ghaffar

Introduction: Cardioplegia is responsible to prevent damage to the heart muscle during open heart operation, also to create a sterile, bloodless operating environment.The perfect cardioplegic solution for protection of the myocardium during operations on the heart is still controversial.Aim: To compare the intraoperative and postoperative requirement for an intra-aortic balloon pump between custodiol histidine-tryptophan-ketoglutarate (HTK) cardioplegia versus traditional crystalloid cardioplegia.Methods: A prospective clinical trial investigation, conducted on 48 individuals underwent pump coronary artery bypass graft surgery.done in the routine cardiothoracic surgeries, Suez Canal University Hospital from 2020 to 2023.Results: The mean lactate one minute and 15 minutes after CC removal was statistically significantly larger in Antegrade traditional cold crystalloid cardioplegia (ICCC) group than in HTK group.The mean CK-MB 15 minutes after reperfusion, 6, 12 and 1 day postoperatively was statistically significantly greater in ICCC group than in HTK group.The mean CTnI 15 minutes after reperfusion, and 6 hours postoperatively was statistically significantly more in ICCC group than in HTK group, group A was statistically significantly advanced in heart rate than group B regarding half an hour after weaning (p= 0.001), one hour after weaning (p= 0.001), sternal closure (p= 0.001) and skin closure (p= 0.002).. Conclusion: According to the biomarkers of myocardial injury, a single dose of custodiol HTK is more effective at preserving the myocardium during coronary artery bypass surgery than intermittent ante grade cold crystalloid cardioplegia.This was determined by comparing the two treatments.

10.21608/ejhm.2023.312371

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Effect of D-STATCOMs Optimal Installment on Voltage Stability Enhancement and Total Energy Saving Cost Considering Load Growth Factor Using WHO

Mirna Fouad Ali Eman Beshr Almoataz Y. Abdelaziz Mohamed Ezzat

10.1109/eeeic/icpseurope61470.2024.10751087

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Charcoal Localization for Surgical Resection of Non-Palpable Suspicious Breast Lesions.

Chirurgia (2022)

Omar Farouk Mohamed Ezzat Adel El‐Badrawy Tamer Fady Wagdi Elkashef

Frecvenţa detectării cancerului mamar infraclinic a crescut odată cu implementarea programelor naţionale de screening.Mai mult, dimensiunile tumorilor detectate au scăzut în ultimii ani, impunând, într-o proporţie semnificativă din cazuri, o localizare imagistică cât mai precisă în vederea exciziei chirurgicale.Deşi localizarea prin intermediul harponului a fost metoda cea mai frecvent utilizată timp de mulţi ani, acest sistem prezintă o serie de dezavantaje care îi limitează aplicarea.Localizarea radioghidată a leziunilor oculte (ROLL) este în prezent metoda standard de marcaj.Cu toate acestea, nu este disponibilă în majoritatea comunităţilor cu resurse limitate.Acest fapt încurajează utilizarea cărbunelui, o metodă simplă şi ieftină de marcare a leziunilor mamare suspecte infraclinice.Acest studiu prospectiv a inclus 34 de paciente care au prezentat leziuni mamare suspecte, nepalpabile (BIRADS 4 sau 5).Tuturor pacientelor li s-au injectat sub ghidaj ecografic 1-3 ml granule de cărbune în suspensie apoasă 3% la marginea superficială a leziunii suspecte şi pe traseul dintre leziune şi punctul de intrare a acului în piele care va reprezenta locul viitoarei incizii.Această metodă a fost efectuată la majoritatea pacienţilor cu o zi înainte de operaţie.Totuşi, în 2 cazuri, excizia chirurgicală a fost

Occult

10.21614/chirurgia.2802

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Citations (3)

Performance Enhancement of Interfacing Controllers for Grid Connected Wind Turbine

2022 23rd International Middle East Power Systems Conference (MEPCON) (2022)

Mohamed Bahgat Mohamed Ezzat Mahmoud A. Attia

The annual growth of grid connected wind turbines raises various challenges in power grids. Improving the control of wind turbines (WT) has a very important mission in ensuring their excellent performance. Thus, in the present paper, different optimization techniques (local unimodal sampling (LUS), harmony search algorithm (HSA), and equilibrium optimization (EO)) are presented. The optimization is applied to the proportional-integral (PI) controllers of the grid side and the rotor side converters (GSC and RSC) installed in the doubly fed induction generator (DFIG). The major goal of the current paper is to improve the grid-connected wind turbine's performance when it encounters an asymmetrical one-line to ground fault. A robustness test is performed by testing the response of the optimized controllers with different wind profiles. The results are obtained by performing simulation analyses using MATLAB/Simulink software. Results show the superiority of EO in enhancing the system's performance.

Robustness

Interfacing

Grid code

10.1109/mepcon55441.2022.10021706

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A computer simulation game for irrigation management

D. Clarke Mohamed Ezzat

Source

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Yearly performance of the photovoltaic active cooling system using the thermoelectric generator

Case Studies in Thermal Engineering (2021)

H. Metwally Nabil Mahmoud W. Aboelsoud Mohamed Ezzat

The PV panel absorbs solar irradiation flux on the surface. Part of the absorbed flux generates electricity, and a more significant amount converts into heat. Different methods are used to maintain photovoltaic at low temperatures. Heat is transferred in all heat transfer forms conduction, convection, and radiation. A photovoltaic panel model is developed in the current study that consists of an active cooling technique. Active cooling systems developed model uses domestic water as a thermoelectric generator's heat sink, and the photovoltaic temperature is a thermoelectric generator heat source. The proposed system depends on domestic water flow from the storage tank to the domestic building system at ambient temperature and under gravity flows and no extra power cost in the water flow process. The active cooling process keeps the PV panel at a steady temperature for almost 2 h and decreases the PV panel temperature in Winter, Spring, and Summer to 295K, 302K, and 311K, respectively, which is sufficient. The results also show the panel efficiency and electrical power generation enhancement by 4% and 20%, respectively, when the efficiency enhancement was steady for 6 h even under transient irradiation flux.

Thermoelectric generator

Thermoelectric cooling

Active cooling

10.1016/j.csite.2021.101252

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Citations (32)

Implementation of Acquisition Data Recorder for an Aircraft

The International Conference on Electrical Engineering/The International Conference on Electrical Engineering (2010)

A. Shawky Mohamed Ezzat Ahmed Azouz Ramy El-Ghwas

Capturing and retrieving data from aircraft (A/C) for the sake of flight test recording, maintenance and crash recording or mission recording& analysis are crucial for fault diagnoses and pilots training.Acquired data from A/C are sorted into two categories; first one is analog/discrete data from analog systems, while the second concerns the MIL-STD 1553 serial data of all its connected remote terminals.UMA2000 is a stateof-art Flight Data Recorder (FDR) was used as a programmable Data Acquisition System for acquiring analog, digital signals and MIL-STD 1553 data acquisition channels, as a Bus Monitor to gather information of flight mission from several systems on the A/C.This paper introduces a way of interfacing UMA2000 on the aircraft platform, gathering, decompressing, decoding, analyzing and converting data to engineering units for retrieving the mission information about the status of the engine, avionics, mission computers ….etc.

10.21608/iceeng.2010.33261

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Copper Lithium Silicate/ZrO2 Nanoparticles-Coated Kevlar for Improving UV-Vis Absorbance/ Protection Properties

Silicon (2019)

Amany M. El Nahrawy Ahmed S. Montaser Ali B. Abou Hammad Mohamed Ezzat Mahmoud H Elshakankery

Kevlar

Absorbance

10.1007/s12633-019-00271-w

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Citations (26)

Manta ray foraging optimization algorithm‐based load frequency control for hybrid modern power systems

IET Renewable Power Generation (2023)

Mohamed A. Sobhy Hany M. Hasanien Almoataz Y. Abdelaziz Mohamed Ezzat

Abstract The regulation of the frequency and line power flow in interconnected power networks is considered to be a key aspect of load frequency control (LFC). This article broaches a modern power network composed of three interconnected control areas including traditional generation units taking into account non‐linearities, also renewable energy sources (RESs) and energy storage (ES) units are involved in the power grid paradigm. Two forms of RESs are included in the analysis, which are photovoltaic (PV) and wind power plants. In addition, the study framework involves three types of ES units, which are batteries of plug‐in electric vehicles (PEVs), flywheel energy storage system (FESS) and capacitive energy storage system (CESS). In this analysis, LFC is accomplished by the use of proportional‐integral‐derivative (PID) controllers in the system control loops. A recent optimization algorithm called Manta Ray Foraging optimization (MRFO) is employed to obtain the optimal gain configuration of the controllers. Real site measurements are imported to the RESs involved in the study aiming to examine the proposed control scheme under realistic conditions. Compared with other rival algorithms, the effectiveness of the MRFO‐based PID controller is validated. Simulation results confirm the efficacy of the proposed control scheme. The findings also ensure the role of ES units in optimizing the time‐domain responses. The main contributions of this paper are applying a new metaheuristic optimization algorithm to solve the LFC problem and introducing a new criteria for judging the system performance in compliance with the harmonic spectrum of the responses in the frequency domain. The results of the simulation are retrieved through a MATLAB model.

Tie line

Automatic Generation Control

Frequency deviation

10.1049/rpg2.12688

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Citations (14)