Thamer A. H. Alghamdi

ORCID: 0000-0002-3212-8493
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Research Areas
  • Microgrid Control and Optimization
  • Smart Grid Energy Management
  • Photovoltaic System Optimization Techniques
  • Antenna Design and Analysis
  • Wind Turbine Control Systems
  • Hybrid Renewable Energy Systems
  • Advanced Battery Technologies Research
  • Energy Load and Power Forecasting
  • Multilevel Inverters and Converters
  • Power Quality and Harmonics
  • Solar Radiation and Photovoltaics
  • Frequency Control in Power Systems
  • Energy Harvesting in Wireless Networks
  • Advanced DC-DC Converters
  • Electric Power System Optimization
  • Microwave Engineering and Waveguides
  • Wireless Body Area Networks
  • Energy and Environment Impacts
  • HVDC Systems and Fault Protection
  • Electric Motor Design and Analysis
  • Forecasting Techniques and Applications
  • Building Energy and Comfort Optimization
  • Advanced Antenna and Metasurface Technologies
  • Optimal Power Flow Distribution
  • Smart Grid Security and Resilience

Cardiff University
2021-2025

Al Baha University
2017-2025

University of the Sciences
2024

National University of Sciences and Technology
2024

Ahram Canadian University
2024

This new paper describes an experimental investigation of a proportional-integral (PI) controller that uses feedback control to regulate energy system multi-rotor wind systems. Pulse width modulation (PWM) is used by the proposed power doubly-fed induction generator controlled direct (DPC), which intended and inverter. The strategy differs from traditional DPC strategy. was studied in case variable speed, where MATLAB Dspace 1104 environment implement this PI (FPI) controller, with...

10.1109/access.2024.3351355 article EN cc-by-nc-nd IEEE Access 2024-01-01

Water is an essential requirement for agricultural productivity. In the agriculture sector, electricity generated by conventional sources contributes to a substantial amount of carbon footprints pumping water through tube wells. Over past few decades, transitional shift towards renewable resources has increased leading decarbonizing environment and considered as viable solution production. To assist provide road map this paradigm shift, proposed study presents techno-economic environmental...

10.1016/j.heliyon.2024.e31025 article EN cc-by-nc-nd Heliyon 2024-05-01

This paper presents a new grid-forming strategy for hybrid AC/DC microgrids using bidirectional virtual inertia support designed to address weak grid conditions. The stability of heavily relies on the AC mains frequency and DC-link voltage, deviations in these factors can lead undesirable outcomes such as load curtailments power system congestions blackouts. introduces unique approach that leverages enhance reliability under proposed employs buffer mitigate rapid changes voltage frequency,...

10.3390/pr12010139 article EN Processes 2024-01-05

The primary objective of this study is to investigate the effects Fractional Order Kepler Optimization Algorithm (FO-KOA) on photovoltaic (PV) module feature identification in solar systems. Leveraging strengths original KOA, FO-KOA introduces fractional order elements and a Local Escaping Approach (LEA) enhance search efficiency prevent premature convergence. FO element provides effective information past expertise sharing amongst participants avoid converging. Additionally, LEA...

10.1016/j.heliyon.2024.e35771 article EN cc-by-nc Heliyon 2024-08-01

Abstract Photovoltaic Water Pumping Systems (PVWPS) have become increasingly important as a renewable energy solution in rural areas, providing independence, cost savings, and environmental friendliness. This system has two main controllers. The first controller is employed to maximize power extraction from the PV array by controlling duty ratio of DC-DC boost converter. second responsible for regulating operation induction motor through switching pulses Voltage Source Inverter (VSI). These...

10.1038/s41598-025-88330-8 article EN cc-by Scientific Reports 2025-02-02

This article presents a quad-element MIMO antenna designed for multiband operation. The prototype of the design is fabricated and utilizes vector network analyzer (VNA-AV3672D) to measure S-parameters. proposed capable operating across three broad frequency bands: 3–15.5 GHz, encompassing C band (4–8 GHz), X (8–12.4 significant portion Ku (12.4–15.5 GHz). Additionally, it covers two mm-wave bands, specifically 26.4–34.3 GHz 36.1–48.9 which corresponds 86% Ka-band (27–40 To enhance its...

10.3390/s23208563 article EN cc-by Sensors 2023-10-18

In Egypt, the production of power and associated environmental problems are starting to take stage. One environmentally responsible way lessen crisis is employ renewable energy sources effectively efficiently. This paper proposes develop a hydrogen storage-based green (or friendly) plant on many Egyptian cities such as Sohag city. To produce hydrogen, proposed station uses storage, solar, wind power. Energy storage systems used store extra produced by turbines solar panels supply when output...

10.1109/access.2024.3406895 article EN cc-by-nc-nd IEEE Access 2024-01-01

The integration of distributed energy resources (DERs) and digital technologies has accelerated the transition to decentralized systems.Among these technologies, blockchain stands out for its ability facilitate peer-to-peer (P2P) trading efficiently securely.This paper explores concept P2P within community microgrid systems, leveraging blockchain-based smart contracts.The proposed system integrates an incentive-driven demand response program directly into contract framework, offering...

10.1109/access.2024.3409706 article EN cc-by-nc-nd IEEE Access 2024-01-01

A staircase-shaped quasi-fractal antenna is presented to meet the requirements of compact electronics operating in UWB or E-UWB spectrum. conventional broadband monopole converted into utilizing three iterations fractal patches. The resultant offers wide impedance bandwidth ranges 2.3-17.8 GHz, having a notch band at 6.1-7.2 GHz. Afterwards, two-port MIMO created by placing second element orthogonally with an edge-to-edge distance 8.5 mm, that λ/15 where λ corresponds free space wavelength...

10.1016/j.heliyon.2023.e23711 article EN cc-by Heliyon 2023-12-17

In the past, copper served as material for conductive patches in antennas; however, its usage was constrained due to high costs, susceptibility fading, bulkiness, environmental sensitivity, and manufacturing challenges.The emergence of graphene nanotechnology has positioned a viable alternative, offering exceptional electrical conductivity, strength, adaptability.In this study, is employed fabricate silver nanocomposites.The silver-graphene (Ag/GO) sample exhibits an conductivity...

10.2528/pierm24011202 article EN Progress In Electromagnetics Research M 2024-01-01

The principal issue associated with wind parks (WPs) based on doubly-fed induction generators (DFIGs) is their vulnerability to network faults. This paper presents a novel non-linear forward power controller design an adaptive backstepping command using parametric estimation (NFPC_ABC-PE) enhance fault ride-through (FRT) capacities in WP utilizing DFIGs. suggested NFPC_ABC-PE manupiles both rotor and network-side converters (i.e., RSPCs NSPCs). Specifically, are manipulated maintain the...

10.1109/access.2024.3381613 article EN cc-by-nc-nd IEEE Access 2024-01-01

Experimental work using Hardware-in-the-loop simulation is performed in this article for a power system based on multi-rotor wind energy generation. Power generated doubly-fed induction generator (DFIG), where the suggested approach to regulate different from direct command (DPC) terms of idea and structure, even though same equations are used estimate powers. Two parallel super-twisting controls control power, modified space vector modulation (MSVM) operate rotor side converter. The...

10.1109/access.2024.3434534 article EN cc-by-nc-nd IEEE Access 2024-01-01

Owing to the benefits of uncomplicated design, compact dimensions, and superior power density, interior permanent magnet synchronous motors (IPMSMs) have garnered attention numerous researchers, both nationally internationally. Nevertheless, conventional IPMSM models incorporating sensors, encoders, additional apparatus often incur substantial equipment expenses heavily depend on sensor accuracy for effective control. Consequently, pursuit sensorless control has emerged as a prominent trend...

10.1177/00202940241312846 article EN cc-by Measurement and Control 2025-01-12

The increasing complexity of modern power systems, driven by smart grid technologies, dispersed generation, and renewable energy sources, has made quality (PQ) evaluation more challenging. Overuse sensors large data volumes further complicate accurate PQ assessment. This paper proposes a flexible signal decomposition methodology using the nonsubsampled contourlet transform (NSCT) for event detection. NSCT's multiscale, multidirectional, shift-invariant properties enable signals into...

10.1177/01445987241312755 article EN cc-by Energy Exploration & Exploitation 2025-01-26

Abstract The planning and operation of radial distribution networks face increasing challenges such as active power losses voltage instability, prompting a focus on integrating renewable energy resources to mitigate these issues. This study presents techno‐economic optimization framework leveraging the cheetah optimizer, recently introduced metaheuristic technique, optimize accommodation distributed resource units within IEEE 33‐bus utilizing MATLAB environment. Both single multi‐objective...

10.1049/gtd2.13322 article EN cc-by IET Generation Transmission & Distribution 2025-01-01

This study tackles the complex task of integrating wind energy systems into electric grid, facing challenges such as power oscillations and unreliable generation due to fluctuating speeds. Focused on conversion systems, particularly those utilizing double-fed induction generators (DFIGs), research introduces a novel approach enhance Direct Power Control (DPC) effectiveness. Traditional DPC, while simple, encounters issues like torque ripples reduced quality hysteresis controller. In...

10.1371/journal.pone.0300527 article EN cc-by PLoS ONE 2024-04-17

This paper proposes a new contribution in the field of optimizing control techniques for wind systems to enhance quality energy produced grid. Although Sliding Mode technique, whether classical or involving use artificial intelligence, has shown interesting results, its main drawback lies oscillation phenomenon commonly referred as "chattering." affects accuracy and robustness system, well parametric variation system. In this work, we propose solution that combines two nonlinear based on...

10.1016/j.heliyon.2024.e31767 article EN cc-by-nc Heliyon 2024-05-22
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