Browsing by Author "Massoud, Ahmed"
Now showing items 1-20 of 41
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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 new fifteen-switch inverter topology for two five-phase motors drive
Dabour, Sherif M.; Rashad, Essam M.; Abdel-khalik, Ayman; Ahmed, Shehab; Massoud, Ahmed ( Institute of Electrical and Electronics Engineers Inc. , 2017 , Conference Paper)The multimotor drives supplied from reduced switch-count converter topologies are potentially employed in different applications such as EVs/HEVs and traction systems. Much research work has been done to investigate the ... -
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 ... -
CYBER-ATTACKS AGAINST VOLTAGE PROFILE IN SMART DISTRIBUTION GRIDS WITH HIGHLY-DISPERSED PV GENERATORS: DETECTION AND PROTECTION
ABU AYSHEH, NOUR GHALIB (2021 , Master Thesis)In this work, we study the effect of cyber-attacks on voltage regulation in smart grids with highly dispersed photovoltaic (PV) power generators. We picture how the cyber-attacks in the distribution network with the existence ... -
Design of High-Gain DC-DC Converters for High-Power PV Applications
Alassi, Abdulrahman (2016 , Master Thesis)Renewable energy sources are penetrating the market in an ever increasing rate, especially in terms of Wind and Solar energies, with the latter being more suitable for the GCC region. Typically, Photovoltaic (PV) strings’ ... -
DEVELOPMENT OF A TRANSFORMERLESS BIPOLAR PULSED-POWER OZONE GENERATOR BASED ON MODULAR BOOST CONVERTERS FOR AIR SANITIZATION
MURAD, ZAID HASAN AHMAD (2023 , Master Thesis)Ozone has become the oxidizing agent of choice used in several applications. Recently, ozone generation has attracted researchers' attention to achieve further development in this field. Some of the crucial applications ... -
ECONOMIC ENERGY ALLOCATION FOR A POWER SYSTEM CONSIDERING TECHNO-ECONOMIC CONSTRAINTS
ELHAFEZ, OMAR M. JOUMA (2023 , Dissertation)During the past few decades, rapid progress in reducing the cost of photovoltaic (PV) energy has been achieved. At the megawatt (MW) to gigawatt (GW) scale, large PV systems are connected to the electricity grid to provide ... -
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 ...