Browsing by Author "Abdel-Khalik, A. S."
Now showing items 21-37 of 37
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Medium voltage flywheel energy storage system employing dual three-phase induction machine with machine-side series-connected converters
Daoud, M.I.; Abdel-Khalik, A. S.; Elserougi, A.; Massoud, Ahmed; Ahmed, S. ( Institution of Engineering and Technology , 2014 , Conference Paper)Flywheels as energy storage systems are good candidates for numerous power system applications such as voltage support, serving fluctuating loads, frequency regulation and renewable energy utilization. Most of these ... -
Medium voltage flywheel energy storage system employing dual three-phase induction machine with machine-side series-connected converters
Daoud, M.I.; Abdel-Khalik, A. S.; Elserougi, A.; Massoud, Ahmed; Ahmed, S. ( Institution of Engineering and Technology , 2014 , Conference Paper)Flywheels as energy storage systems are good candidates for numerous power system applications such as voltage support, serving fluctuating loads, frequency regulation and renewable energy utilization. Most of these ... -
Modified modulation scheme for photovoltaic fed grid-connected three-phase boost inverter
Diab, M. S.; Elserougi, A.; Abdel-Khalik, A. S.; Massoud, Ahmed; Ahmed, S. ( IEEE , 2013 , Conference Paper)Transformer-less photovoltaic (PV) inverters are the major functional units of modern grid-connected PV energy production systems. In general, two power conversion stages are required when low-voltage unregulated photovoltaic ... -
Multi-module Bi-directional Buck-Boost Inverter-based HVDC back-to-back transmission system
Elserougi, A.; Abdel-Khalik, A.S.; Massoud, Ahmed; Ahmed, S. ( IEEE , 2013 , Conference Paper)Offshore wind energy is now seen as a key contributor to the renewable energy future. HVDC technology is among the chief technologies enabling widespread use of offshore wind. This paper proposes a new configuration, namely, ... -
New topologies for photovoltaic-fed single-stage boost inverters
Elserougi, A.; Massoud, Ahmed; Abdel-Khalik, A.S.; Ahmed, S. ( IEEE , 2013 , Conference Paper)In photovoltaic-fed applications, boosting the limited output voltage is very essential. Single-stage boost inverters can efficiently be used to interface renewable energy sources. In this paper, different topologies for ... -
Non-linear sliding-mode control of three-phase buck-boost inverter
Diab, M. S.; Elserougi, A.; Abdel-Khalik, A. S.; Elarabawy, I.F.; Massoud, Ahmed; Ahmed, S.... more authors ... less authors ( Institute of Electrical and Electronics Engineers Inc. , 2014 , Conference Paper)The development of static power converters capable of transforming DC energy obtained from alternative sources into AC has become one of the main challenges in renewable energy systems. In this context, the buck-boost ... -
Performance assessment of single and dual loops discrete PR controllers with LCL filter for inverter-based distributed generation
El-Deeb, H. M.; Elserougi, A.; Abdel-Khalik, A.S.; Ahmed, S.; Massoud, Ahmed ( IEEE Computer Society , 2014 , Conference Paper)Due to the rapid growth of the electric energy demands, the necessity of involvement of distributed generation (DG) to overcome this demand became a must. When distributed generation renewable energy sources are coupled ... -
Performance of a five-phase boost inverter-fed submersible induction machine
Hakeem , A. A.; Elserougi, A.; Abdel-Khalik, A. S.; Ahmed, S.; Massoud, Ahmed (2013 , Conference Paper)An electrical submersible pump (ESP) motor is preferably fed from a low voltage variable-frequency drive (VFD) followed by a step-up transformer. The motor and drive connection through a long feeder usually causes over ... -
Ride-through capability enhancement of VSC-HVDC based wind farms using low speed flywheel energy storage system
Daoud, M. I.; Massoud, Ahmed; Ahmed, S.; Abdel-Khalik, A. S.; Elserougi, A. ( Institute of Electrical and Electronics Engineers Inc. , 2014 , Conference Paper)Reliable balancing of active power generated via wind farms is vital for power system stability and for maintaining system frequency deviations within acceptable limits. This paper presents a backup power balancing technique ... -
Ride-through capability of grid-connected brushless cascade DFIG wind turbines in faulty grid conditions-A comparative study
Gowaid, I. A.; Abdel-Khalik, A. S.; Massoud, Ahmed; Ahmed, S. ( IEEE , 2013 , Article)Doubly-fed induction generator (DFIG)-based wind turbines (WTs) are reported to suffer reliability problems due to the presence of slip-rings, brushes, and the gearbox. These disadvantages encouraged several research groups ... -
Sensorless field oriented control of five-phase induction machine under open-circuit phase faults
Morsy, A.S.; Abdel-Khalik, A.S.; Ahmed, S.; Massoud, Ahmed ( IEEE , 2013 , Conference Paper)Recently, multiphase machine is promoted to replace three-phase drives in high power safety-critical applications. Among the numerous advantages of multiphase induction machine drives, operation and self-starting under ... -
Single-sensor-based three-phase permanent-magnet synchronous motor drive system with luenberger observers for motor line current reconstruction
Hafez, B.; Abdel-Khalik, A. S.; Massoud, Ahmed; Ahmed, S.; Lorenz, R. D. ( Institute of Electrical and Electronics Engineers Inc. , 2014 , Article)This paper presents an algorithm that enables single-sensor operation of vector-controlled three-phase permanent-magnet-synchronous-motor voltage source inverter (VSI)-based drive systems. The closed-loop operation is ... -
Studying the effect of over-modulation on the output voltage of three-phase single-stage grid-connected boost inverter
Abbas Elserougi, A.; Abdel-Khalik, A. S.; Massoud, Ahmed; Ahmed, S. ( Elsevier B.V. , 2013 , Article)Voltage boosting is very essential issue in renewable-energy fed applications. The classical two-stage power conversion process is typically used to interface the renewable energy sources to the grid. For better efficiency, ... -
Torque ripple reduction of radial magnetic gearbox using axial pole pairing
Zaytoon, H.; Abdel-Khalik, A.S.; Massoud, Ahmed; Ahmed, S.; Elarabawy, I. ( Institution of Engineering and Technology , 2014 , Conference Paper)Magnetic gearbox (MGB) is a contactless magnet-based transmission system that transmits mechanical power between two shafts. MGBs offer significant advantages over mechanical gears such as contactless power transfer, high ... -
Traction system with on-board inductive power transfer
Abdel-Khalik, A. S.; Ahmed, S.; Massoud, Ahmed ( Institution of Engineering and Technology , 2014 , Conference Paper)In traction applications based on long primary and short secondary type, contactless electrical energy transmission can offer distinct advantages over the conventional energy transmission based on catenary system to provide ... -
Traction system with on-board inductive power transfer
Abdel-Khalik, A. S.; Ahmed, S.; Massoud, Ahmed ( Institution of Engineering and Technology , 2014 , Conference Paper)In traction applications based on long primary and short secondary type, contactless electrical energy transmission can offer distinct advantages over the conventional energy transmission based on catenary system to provide ... -
Vector control of multiphase induction machine under open-circuit phase faults
Abdel-Khalik, A.S.; Elserougi, A.; Ahmed, S.; Massoud, Ahmed ( IEEE Computer SocietyIEEE , 2013 , Conference Paper)Multiphase induction machine is normally controlled using rotor field oriented vector control. Under phase(s) loss, the machine currents can be optimally controlled to satisfy certain optimization criteria. In this paper, ...