Ahmed Elkholy

Ahmed Elkholy

Driven electrical engineer and an experienced Assistant Lecturer at Tanta University with a passion for education and electrical engineering. M.Sc. in power systems and am currently pursuing my Ph.D. on MPEI. I am skilled in AutoCAD, Negotiation, English, Management, and Electrical Engineering, as well as programming languages such as SQL and Python. I aim to advance technologies and inspire future innovators through hands-on teaching and enthusiastic research collaborations.

Publications

Design and Implementation of an Arc Suppression Device for Single Line to Ground Faults in Power Systems

Published in , 2024

This paper proposes an arc suppression device to address hazardous arcs caused by shunt faults in power systems. The device injects voltage into the neutral line path, reducing arc currents during fault conditions and preventing system isolation. Existing methods for arc suppression are reviewed, including passive and active technologies, with their limitations discussed. The paper presents design considerations for the proposed device, such as neutral path selection and voltage injection method, and evaluates its effectiveness through simulations conducted using MATLAB Simulink. The results show that the addition of a device that injects zero sequence component significantly limits the fault current in the faulty phase. The voltage at the load terminal is not affected by the addition of the device. The device is a low-cost and advantageous alternative to active arc suppression devices, combining the benefits of passive and active devices while avoiding their negative effects. Additionally, changing the open delta polarity or transformer ratio does not affect the fault current. Practical implementation issues, such as cost and compatibility with existing power system components, are also discussed.

Recommended citation: A. M. Elkholy, D. I. Panfilov and M. G. Astashev, "Design and Implementation of an Arc Suppression Device for Single Line to Ground Faults in Power Systems," 2023 24th International Middle East Power System Conference (MEPCON), Mansoura, Egypt, 2023, pp. 1-7, doi: 10.1109/MEPCON58725.2023.10462330. https://doi.org/10.1109/MEPCON58725.2023.10462330

Identifying the Rating of the Unified Power Controller According to Unbalanced Distribution System Requirements

Published in , 2023

This paper presents a method for designing the ratings of a unified power flow controller (UPC), a device that can control and balance the active and reactive power flows through a three-phase transmission line by injecting current using a variable coefficient transformer. The determination of the UPC rating depends on the load profile of the unbalanced distribution system, and the rating of the UPC depends on their use as active and reactive power balancer or as active power balancer and reactive power compensator. The procedure is applied to a standard 13-bus IEEE unbalanced distribution system with different load scenarios to evaluate UPC performance in each case.

Recommended citation: A. M. Elkholy, D. I. Panfilov, and A. E. ELGebaly, "Identifying the Rating of the Unified Power Controller According to Unbalanced Distribution System Requirements," 2023 IEEE 24th International Conference of Young Professionals in Electron Devices and Materials (EDM), Novosibirsk, Russian Federation, 2023, pp. 950-956, doi: 10.1109/EDM58354.2023.10225130. https://doi.org/10.1109/EDM58354.2023.10225130

Evaluation of the Influence of AC Voltage Regulators, SVC and Unified Power Controllers on Power Losses and Quality in Unsymmetrical Distribution Systems

Published in , 2023

This paper studies the performance of unbalanced three-phase distribution systems under the correction effect of Unified Power Controller (UPC), static VAR compensators (SVC) and AC voltage regulators (booster). The Newton-Raphson method and Carson equation are integrated to analyse the performance of the IEEE-13 bus unbalanced distribution model. Optimization study is conducted to decide the mode of operation of each proposed device to improve the system asymmetry. The objective function is formulated to have both power losses and unbalanced coefficients that should be minimized. The genetic algorithm (GA) is used to determine the mode of operation of each device when it is applied in an unbalanced distribution system.

Recommended citation: D. I. Panfilov, A. M. Elkholy and A. E. ELGebaly, "Evaluation of the Influence of AC Voltage Regulators, SVC and Unified Power Controllers on Power Losses and Quality in Unsymmetrical Distribution Systems," 2023 IEEE 24th International Conference of Young Professionals in Electron Devices and Materials (EDM), Novosibirsk, Russian Federation, 2023, pp. 950-956, doi: 10.1109/EDM58354.2023.10225221. https://doi.org/10.1109/EDM58354.2023.10225221

Evaluation of Zero and Negative Sequence Currents Influence of Asymmetric Load on the Power Losses and Quality in Distribution Networks

Published in , 2023

Researchers and system engineers have given distribution system power quality issues a lot of attention recently. Due to the rising use of sensitive loads in the distribution system, difficulties with unbalanced voltage coefficient and losses are given the utmost attention among the many power quality challenges.

Recommended citation: A. M. Elkholy, D. I. Panfilov and A. E. El Gebaly, "Evaluation of Zero and Negative Sequence Currents Influence of Asymmetric Load on the Power Losses and Quality in Distribution Networks," 2023 IEEE 24th International Conference of Young Professionals in Electron Devices and Materials (EDM), Novosibirsk, Russian Federation, 2023, pp. 1110-1115, doi: 10.1109/EDM58354.2023.10225208. https://doi.org/10.1109/EDM58354.2023.10225208

The Influence of Transmission-Line Parameters and Its Load on Losses and Power Quality at the Load-Connection Point

Published in , 2023

This paper examines the influence of transmission-line parameters and load on losses and power quality at the load-connection point.

Recommended citation: Elkholi, Ahmed M.; Panfilov, D.I.; Astashev, M.G. (2023). "The Influence of Transmission-Line Parameters and Its Load on Losses and Power Quality at the Load-Connection Point." Russian Electrical Engineering, 94, 403–411. doi: 10.3103/S1068371223060044 https://doi.org/10.3103/S1068371223060044

Grid Synchronization Enhancement of Distributed Generators Using an Adaptive Phase-Locked Loop Tuning System

Published in Electronics, 2022

This paper proposes an effective algorithm for updating the phase-locked loop (PLL) gains according to the value of the short circuit ratio to decrease the weak grid effect in the PLL controllers.

Recommended citation: Elkholy, Ahmed M.; Taha, Ibrahim B. M.; Kamel, Salah; El-Nemr, Mohamed K. (2022). "Grid Synchronization Enhancement of Distributed Generators Using an Adaptive Phase-Locked Loop Tuning System." Electronics. 11(5):702. https://doi.org/10.3390/electronics11050702

Performance Enhancement of Wave Energy Converters Integrated with DC Grids Using Energy Storage Systems

Published in 2021 22nd International Middle East Power Systems Conference (MEPCON), 2021

This paper discusses the performance enhancement of wave energy converters integrated with DC grids using energy storage systems.

Recommended citation: Hussien, Mohamed G.; Elkholy, Ahmed M.; Mansour, Diaa-Eldin A.; Akl, Mahmoud M.; Numair, Mohamed; Soliman, Ismail A. (2021). "Performance Enhancement of Wave Energy Converters Integrated with DC Grids Using Energy Storage Systems." 2021 22nd International Middle East Power Systems Conference (MEPCON). https://ieeexplore.ieee.org/document/9686294/

Hosting Capacity Enhancement Through IoT-based Active Power Curtailment of PV Generation

Published in 2021 22nd International Middle East Power Systems Conference (MEPCON), 2021

This paper presents an IoT-based hosting capacity enhancement technique by active power curtailment of the power generated from PV systems at prosumers.

Recommended citation: Soliman, Ismail A; Numair, Mohamed; Akl, Mahmoud M; Mansour, Diaa-Eldin A; Elkholy, Ahmed M; Hussien, Mohamed G. (2021). "Hosting Capacity Enhancement Through IoT-based Active Power Curtailment of PV Generation." 2021 22nd International Middle East Power Systems Conference (MEPCON). https://ieeexplore.ieee.org/document/9686240/

General Framework for Intentional Islanding to Enhance Distribution System Performance

Published in Electric Power Components and Systems, 2020

This paper proposes a general framework for intentional islanding to enhance distribution system performance.

Recommended citation: Elkholy, Ahmed M.; Abd el-Ghany, Hossam A.; Azmy, Ahmed M. (2020). "General Framework for Intentional Islanding to Enhance Distribution System Performance." Electric Power Components and Systems. 48(14-15):1488-1507. https://www.tandfonline.com/doi/full/10.1080/15325008.2020.1856227

An Advanced Load Shedding Algorithm to Enhance Intentional-Islanding Dynamics

Published in 2018 Twentieth International Middle East Power Systems Conference (MEPCON), 2018

This paper proposes an advanced load shedding algorithm to enhance intentional-islanding dynamics.

Recommended citation: Elkholy, Ahmed M.; El-Ghany, Hossam A. Abd; Azmy, Ahmed M. (2018). "An Advanced Load Shedding Algorithm to Enhance Intentional-Islanding Dynamics." 2018 Twentieth International Middle East Power Systems Conference (MEPCON). https://ieeexplore.ieee.org/document/8635139/

A proposed load shedding mechanism for enhancing intentional-islanding dynamics of distribution systems

Published in 2017 Nineteenth International Middle East Power Systems Conference (MEPCON), 2017

This paper proposes a load shedding mechanism for enhancing intentional-islanding dynamics of distribution systems.

Recommended citation: Elkholy, Ahmed M.; El-Ghany, Hossam A. Abd; Azmy, Ahmed M. (2017). "A proposed load shedding mechanism for enhancing intentional-islanding dynamics of distribution systems." 2017 Nineteenth International Middle East Power Systems Conference (MEPCON). http://ieeexplore.ieee.org/document/8301282/