Browsing Electrical Engineering by Author "Massoud, Ahmed"
Now showing items 1-20 of 29
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A bi-directional boost converter-based non-isolated DC-DC transformer with modular solid-state switches for medium-/high-voltage DC grids
Elserougi, Ahmed; Massoud, Ahmed; Ahmed, Shehab ( Institute of Electrical and Electronics Engineers Inc. , 2017 , Conference Paper)In this paper, a bi-directional non-isolated dc-dc transformer is proposed, which can be used for connecting different dc voltage levels in medium-/high-voltage dc grids. The proposed dc-dc transformer is based on the ... -
A boost converter-based ringing circuit with high-voltage gain for unipolar pulse generation
Elserougi, Ahmed; Ahmed, Shehab; Massoud, Ahmed ( Institute of Electrical and Electronics Engineers Inc. , 2016 , Article)High-Voltage pulse generators are commonly used in biotechnology, medicine, industrial applications, food processing and drinking water purification. The dc-dc boost converter has been used before in pulsed applications ... -
A four-switch based long-cable-fed five-phase induction motor drive system
Massoud, Ahmed; Elserougi, Ahmed; Abdel-Khalik, Ayman; Ahmed, Shehab ( Institute of Electrical and Electronics Engineers Inc. , 2016 , Conference Paper)In applications where motors are fed from low voltage variable-frequency drive (VFD) through long cables, a step up transformer is commonly used to boost the converter output voltage in order to compensate for the cable ... -
A full bridge-based fault current controller for distributed generation systems
Alsalemi, Safana; Almadhoun, Salma; Najad, Marzyeh; Massoud, Ahmed ( Institute of Electrical and Electronics Engineers Inc. , 2016 , Conference Paper)Nowadays the demand of electricity is continuously increasing which necessitates adding more distributed generators, causing the level of fault current to highly increase. The level of Fault Current (FC) could even exceed ... -
A highly efficient PV power system for DC MicroGrids
Elfeqy, Hebatallah; Shahin, May; Al-Rumaihi, Amna; Massoud, Ahmed; Gastli, Adel ( Institute of Electrical and Electronics Engineers Inc. , 2016 , Conference Paper)Climate change attracted widespread attention to shift towards environmentally friendly energy sources such as photovoltaics. Considering the facts that there are large numbers of DC loads that are used in today's buildings, ... -
A hybrid boost modular multilevel converter-based bipolar high voltage pulse generator
Elserougi, Ahmed; Massoud, Ahmed; Daoud, Mohamed; Ahmed, Shehab ( Institute of Electrical and Electronics Engineers Inc. , 2017 , Article)Conventional Modular Multilevel Converter (MMC) with Half-Bridge Sub-Modules (HB-SMs) can be used effectively as a solid-state high-voltage pulse generator to chop a high-voltage dc input into a bipolar pulsed output voltage ... -
A Matlab/Simulink model for capacitor voltages balancing in modular multilevel converters
Ahmed, Nada; Massoud, Ahmed ( Institution of Engineering and Technology , 2016 , Conference Paper)The modular multilevel converter (MMC) is a potential candidate for high power applications due to its modularity, availability, and enhanced power quality features. Nevertheless, the voltage balancing of the floating ... -
A Non-Isolated Hybrid-Modular DC-DC Converter for DC Grids: Small-Signal Modeling and Control
Elserougi, Ahmed; Abdelsalam, Ibrahim; Massoud, Ahmed; Ahmed, Shehab ( Institute of Electrical and Electronics Engineers Inc. , 2019 , Article)This paper presents small-signal modeling, stability analysis, and controller design of a non-isolated bidirectional hybrid-modular DC-DC Converter for DC grid applications. The DC-DC converter can be used to interconnect ... -
A sensorless Kalman filter-based active damping technique for grid-tied VSI with LCL filter
Eldeeb, Hisham; Massoud, Ahmed; Abdel-Khalik, Ayman S.; Ahmed, Shehab ( Elsevier Ltd , 2017 , Article)Employing the LCL passive filter in inverter-based distributed generation to ensure high quality power delivery comes at the expense of poor performance due to the resonance phenomenon. Literature elucidated several active ... -
Application of stator shifting to five-phase fractional-slot concentrated winding interior permanent magnet synchronous machine
Abdel-Khalik, Ayman S.; Ahmed, Shehab; Massoud, Ahmed ( Institution of Engineering and Technology , 2016 , Article)In many applications, interior permanent magnet synchronous machines (IPMSMs) with fractional slot concentrated windings (FSCWs) are considered promising candidates in terms of higher power density and efficiency. In ... -
Conceptual study of a Bipolar modular high voltage Pulse generator with sequential charging
Elserougi, Ahmed; Massoud, Ahmed; Ahmed, Shehab ( Institute of Electrical and Electronics Engineers Inc. , 2016 , Article)Repetitive Pulsed Electric Field (PEF) is a common technique for disinfecting liquids. By applying adequate PEF across germ cell membranes, an irreversible electroporation process, and cell destruction can be achieved. The ... -
Effect of multilayer windings on five-phase interior PM machines
Abdel-Khalik, Ayman S.; Ahmed, Shehab; Massoud, Ahmed ( Institute of Electrical and Electronics Engineers Inc. , 2016 , Conference Paper)Thanks to their higher power density and efficiency, the interior permanent magnet (IPM) machines equipped with a fractional slot concentrated winding (FSCW) layout have shown potentials in electric vehicle applications. ... -
Effect of stator winding connection on performance of five-phase linear induction machines
Abdel-Khalik, Ayman S.; Hamad, Mostafa; Ahmed, Shehab; Massoud, Ahmed ( Institution of Engineering and Technology , 2016 , Conference Paper)In electric traction, Linear Induction Motors (LIMs) have become a competitive alternative, especially for low speed applications where machines with short stators are commonly used. Due to driving dynamics tolerances, ... -
Enhancing the DC voltage utilization of twelve-switch voltage source inverter feeding symmetrical/asymmetrical nine-phase loads
Elserougi, Ahmed; Abdelsalam, Ibrahim; Massoud, Ahmed; Ahmed, Shehab ( Institute of Electrical and Electronics Engineers Inc. , 2017 , Conference Paper)Twelve-Switch Nine-Phase Inverter (TSNPI) can be used to feed three independent three-phase loads or nine-phase load such as nine-phase machines. It provides dc-ac conversion with a reduced number of switches, as only ... -
Flywheel Energy Storage Systems
Daoud, Mohammed; Abdel-Khalik, Ayman; Elserogi, Ahmed; Ahmed, Shehab; Massoud, Ahmed ( John Wiley & Sons, Ltd , 2015 , Book chapter)Flywheels are one of the oldest and most popular energy storage media owing to the simplicity of storing kinetic energy in a rotating mass. Flywheel energy storage systems (FESSs) can be used in different applications, for ... -
Generation, performance evaluation and control design of single-phase differential-mode buck-boost current-source inverters
Darwish, Ahmed; Massoud, Ahmed; Holliday, Derrick; Ahmed, Shehab; Williams, Barry ( Institution of Engineering and Technology , 2016 , Article)Differential-mode inverter topologies are promising for renewable energy generation since they offer advantages such as passive elements sizes reduction, having decreased power losses and reduced total cost. Single phase ... -
Half-bridge modular multilevel-based HVDC converters with external pre-charged capacitors for dc fault current suppression capability
Elserougi, Ahmed; Ahmed, Shehab; Massoud, Ahmed ( Institution of Engineering and Technology , 2016 , Conference Paper)Half-Bridge Modular Multilevel Converters (HB-MMCs) are defenseless against DC side faults. Different types of DC Circuit Breakers (DCCBs) assisted with arrester banks/damping resistors such as solid-state CBs and hybrid ... -
High-voltage pulse generator based on capacitor-diode voltage multiplier centrally fed from dc-dc boost converter
Elserougi, Ahmed; Ahmed, Shehab; Massoud, Ahmed ( Institution of Engineering and Technology , 2016 , Conference Paper)High voltage pulse generators are commonly used in water treatment applications. In this paper, a high voltage pulse generator with closed loop control on its output voltage is presented. The high-voltage pulse generator ... -
Load shedding and forecasting in distribution systems with PV-based distributed generation and electric vehicles
Tahir, Anas; Massoud, Ahmed ( Institute of Electrical and Electronics Engineers Inc. , 2017 , Conference Paper)The aim of the paper is to investigate the load shedding and forecasting in distribution networks with PV-based Distributed Generation (DG) and Plug-in Electric Vehicles (PEVs). Advancement in technology, especially in the ... -
Military Fuel Cell-Based Vehicles: Modular Power DC-DC Converter System
Aboueata, Walid Mahmoud; Massoud, Ahmed; Al-Obaidi, Sinan ( Qatar University Press , 2021 , Poster)Electric Vehicles (EVs) have attracted researchers' attention to further develop and enhance this strategic area. Compared to fuel-based vehicles, EVs are more in demand nowadays due to their high performance and modern ...