Browsing by Author "Abdel-Khalik, A. S."
Now showing items 1-20 of 37
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A new protection scheme for HVDC converters against DC-side faults with current suppression capability
Elserougi, A.A.; Abdel-Khalik, A. S.; Massoud, Ahmed; Ahmed, S. ( Institute of Electrical and Electronics Engineers Inc. , 2014 , Article)Two-level voltage-source converters and half-bridge modular multilevel converters are among the most popular types of HVDC converters. One of their serious drawbacks is their vulnerable nature to dc-side faults, since the ... -
A novel open-stator-winding DFIM flywheel architecture for renewable energy applications
Gowaid, I.,A.; Elserougi, A.; Abdel-Khalik, A.S.; Massoud, Ahmed; Ahmed, S. ( IEEE , 2013 , Conference Paper)Energy storage is becoming a basic component of modern renewable power plants, especially wind farms. For several considerations, local wind turbine (WT) energy storage is preferred. Flywheel energy storage is among the ... -
A simple active-power control technique for grid-connected three-phase inverters at unity power factor
Elserougi, A.; Abdel-Khalik, A.S.; Ahmed, S.; Massoud, Ahmed ( IEEE Computer Society , 2013 , Conference Paper)This paper presents a simple active-power control technique for low voltage grid-connected three-phase inverters with zero injected reactive power (unity power factor at grid). Two versions of the proposed controller are ... -
A single-stage three-phase DC/AC inverter based on Cuk converter for PV application
Darwish, A.; Elserougi, A.; Abdel-Khalik, A. S.; Ahmed, S.; Massoud, Ahmed; Holliday, D.; Williams, B. W.... more authors ... less authors ( IEEE , 2013 , Conference Paper)This paper presents a new three-phase dc-ac inverter based on the basic Cuk converter. The main feature of the proposed topology is the fact that the energy storage elements as inductors and capacitors values can be reduced ... -
A stationary frame current control for inverter-based distributed generation with sensorless active damped LCL filter using Kalman filter
El-Deeb, H.M.; Elserougi, A.; Abdel-Khalik, A.S.; Ahmed, S.; Massoud, Ahmed ( Institute of Electrical and Electronics Engineers Inc. , 2014 , Conference Paper)Due to the large variety of renewable power sources, power electronics play an important role in energy conversion. Different power converter topologies are used to interface distributed power generation systems (DPGS) ... -
A wind turbine architecture employing a new three port magnetic gear box
Abdel-Khalik, A.S.; Elserougi, A.; Ahmed, S.; Massoud, Ahmed ( IEEE Computer Society , 2012 , Conference Paper)Mechanical gearboxes are typically employed with doubly-fed induction generator based wind turbines to convert the turbine's low speed mechanical power into high-speed mechanical power to drive the electrical generator. ... -
Active and reactive power management of photovoltaic-based interline dynamic voltage restorer in low voltage distribution networks
Elserougi, A.; Abdel-Khalik, A. S.; Ahmed, S.; Massoud, Ahmed ( IEEE Computer Society , 2012 , Conference Paper)A dynamic voltage restorer (DVR) is a series connected device that can support the voltage at existing critical loads during voltage sags. Voltage restoration may need active and/or reactive power injection into the ... -
An adaptive PR controller for inverter-based distribution generation with active damped LCL filter
El-Deeb, H. M.; Elserougi, A.; Abdel-Khalik, A. S.; Ahmed, S.; Massoud, Ahmed ( IEEE , 2013 , Conference Paper)The fact distribution generation (DG) importance is growing rapidly in the recent years where the coupling between DG sources and the grid is done through inverters where exporting low distorted currents and high quality ... -
An axial magnetic gearbox with an electric power output port
Zaytoon, H.; Abdel-Khalik, A. S.; Massoud, Ahmed; Ahmed, S. ( Institute of Electrical and Electronics Engineers Inc. , 2014 , Conference Paper)Recently, magnetic gearboxes (MGBs) are attracting more followers as they offer great benefits over conventional mechanical gearboxes including contactless operation, lower noise, lower vibration, and they are maintenance-free. ... -
An improved performance direct-drive permanent magnet wind generator using a novel single-layer winding layout
Abdel-Khalik, A. S.; Ahmed, S.; Massoud, Ahmed; Elserougi, A. A. ( IEEE , 2013 , Article)Direct-drive permanent magnet (PM) generators have become a strong contender in medium and large rating wind energy conversion systems as they not only provide higher efficiency and annual energy production, but also reduce ... -
Bidirectional buck-boost inverter-based HVDC transmission system with AC-side contribution blocking capability during DC-side faults
Elserougi, A. A.; Massoud, Ahmed; Abdel-Khalik, A.S.; Ahmed, S. ( Institute of Electrical and Electronics Engineers Inc. , 2014 , Article)Offshore wind energy is now seen as a key contributor for the future renewable energy mix. HVDC technology is among the chief technologies enabling widespread use of offshore wind. Thanks to their numerous advantages, ... -
Brushless doubly fed induction machine as a variable frequency transformer
Abdel-Khalik, A. S.; Elserougi, A.; Ahmed, S.; Massoud, Ahmed ( IEEE , 2012 , Conference Paper)Variable frequency transformer (VFT) has been recently used as an alternative to HVDC to control power flow between asynchronous networks. VFT consumes less reactive power than a back-to-back HVDC system, provides faster ... -
Calculation of derating factors based on steady-state unbalanced multiphase induction machine model under open phase(s) and optimal winding currents
Abdel-Khalik, A. S.; Masoud, M. I.; Ahmed, S.; Massoud, Ahmed ( Elsevier , 2014 , Article)Multiphase machines have become a promising candidate in high-power applications as they offer many advantages over their three-phase counterparts. The main salient feature is the high fault tolerance capability. During ... -
Control of doubly-fed induction machine storage system for constant charging/discharging grid power using artificial neural network
Abdel-Khalik, A.S.; Elserougi, A.; Massoud, Ahmed; Ahmed, S. ( IET , 2012 , Conference Paper)A large-capacity low-speed flywheel energy storage system based on a doubly-fed induction machine (DFIM) basically consists of a wound-rotor induction machine, and a back-to-back converter for rotor excitation. It has been ... -
DC bus control of an advanced flywheel energy storage kinetic traction system for electrified railway industry
Daoud, Mohamed I.; Abdel-Khalik, A. S.; Elserougi, A.; Ahmed, S.; Massoud, Ahmed ( IEEE , 2013 , Conference Paper)The evolution of public transportation exhibits high potential nowadays due to the consistent demand of clean transportation with low pollution rates. Therefore electrified railway systems become viable with their ... -
Discrete time domain analysis and optimal design of stationary frame AC current controllers with active damped LCL Filter for high power applications
El-Deeb, H.M.; Elserougi, A.; Abdel-Khalik, A.S.; Ahmed, S.; Massoud, Ahmed ( IEEE Computer Society , 2014 , Conference Paper)Due to the large variety of renewable power sources, power electronics play an important role in energy conversion. Different power converter topologies are used to interface distributed power generation systems (DPGS) ... -
Effect of current harmonic injection on constant rotor volume multiphase induction machine stators: A comparative study
Abdel-Khalik, A. S.; Masoud, M. I.; Ahmed, S.; Massoud, Ahmed ( IEEE , 2012 , Article)Although torque enhancement in multiphase induction machines using harmonic current injection has been addressed in the literature, a detailed assessment of the effect of this enhancement on the design parameters of ... -
Fault current contribution scenarios for grid-connected voltage source inverter-based distributed generation with an LCL filter
Darwish, A.; Abdel-Khalik, A. S.; Elserougi, A.; Ahmed, S.; Massoud, Ahmed ( Elsevier , 2013 , Article)Inverter-based distributed generation (IBDG) is characterized by its negligible fault current contribution compared with synchronous generators due to its inherent non-overload capabilities. Thus, IBDG hardly affects the ... -
Fault ride-through capability enhancement based on flywheel energy storage system for wind farms connected via VSC high voltage DC transmission
Ahmed, K.H.; Abdel-Khalik, A.S.; Elserougi, A.; Massoud, Ahmed; Ahmed, S. ( Institution of Engineering and Technology , 2012 , Conference Paper)This paper proposes a recovery strategy for wind energy-fed voltage source converter high voltage DC transmission systems, capable of maintaining power balance between the AC and DC sides during different AC faults. This ... -
Generalized theory of mixed pole machines with a general rotor configuration
Abdel-Khalik, A. S.; Masoud, M. I.; Ahmed, M. M. ( Elsevier B.V. , 2013 , Article)This paper introduces a generalized theory for the operation of mixed pole machines (MPMs). The MPM has two stator windings, namely the main winding with pole pairs P1 and the control winding with pole pairs P2. The MPM ...