Browsing by Author "Elserougi, A.A."
Now showing items 1-20 of 24
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A Full-Bridge Submodule-Based Modular Unipolar/Bipolar High-Voltage Pulse Generator with Sequential Charging of Capacitors
( Institute of Electrical and Electronics Engineers Inc. , 2017 , Article)Repetitive high pulsed electric field (PEF) is an effective method to kill microorganisms and bacteria in water treatment applications. The PEF can be generated by applying high-power electromagnetic pulse across the sample ... -
A Grid-Connected Capacitor-Tapped Multimodule Converter for HVDC Applications: Operational Concept and Control
( Institute of Electrical and Electronics Engineers Inc. , 2018 , Article)In this paper, a dc-ac buck converter is proposed as a grid-side converter in high voltage dc (HVdc) transmission systems for high-power renewable energy source grid integration. The proposed architecture consists of ... -
A grid-connected switched PV array
( Institute of Electrical and Electronics Engineers Inc. , 2015 , Conference)In this paper, a grid-connected version of the switched PV array will be presented. The PV array consists of n parallel-connected strings and m series-connected modules per string, i.e. an array with a dimension of (m - ... -
A HVDC shunt tap based on unidirectional hybrid modular DC-DC converter with simultaneous charging and sequential discharging of capacitors
( Elsevier Ltd , 2018 , Article)In this paper, a new HVDC shunt tap is proposed. The proposed configuration consists of a unidirectional hybrid modular DC-DC converter followed by a voltage source converter for DC-AC conversion to feed a local AC network ... -
A Hybrid Nine-Arm Modular Multilevel Converter for Medium-Voltage Six-Phase Machine Drives
( Institute of Electrical and Electronics Engineers Inc. , 2019 , Article)The nine-arm modular multilevel converter (9A-MMC) has been recently proposed as a reduced MMC topology variation for six-phase drive applications, with 25% reduction in the number of employed arms and associated components, ... -
A Modular High-Voltage Pulse-Generator with Sequential Charging for Water Treatment Applications
( Institute of Electrical and Electronics Engineers Inc. , 2016 , Article)High-voltage pulse-generators can be used effectively for bacterial decontamination in water treatment applications. Applying a pulsed electric field to the infected water sample guarantees killing of harmful germs and ... -
A new protection scheme for HVDC converters against DC-side faults with current suppression capability
( 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 nine-arm modular multilevel converter (9A-MMC) for six-phase medium voltage motor drives
( Institute of Electrical and Electronics Engineers Inc. , 2015 , Conference)Dual three-phase (asymmetrical six-phase) induction motors have received significant attention in high power medium voltage drive applications. Typically, two three-phase voltage source converters are needed to feed such ... -
A Self-Balanced Bidirectional Medium-/High-Voltage Hybrid Modular DC-DC Converter with Low-Voltage Common DC-Link and Sequential Charging/Discharging of Submodules Capacitors
( Institute of Electrical and Electronics Engineers Inc. , 2019 , Article)This paper proposes a medium-/high-voltage high-power hybrid modular DC-DC converter to interconnect two different dc-voltage levels in medium-/high-voltage dc grids. The converter consists of half-bridge submodules (SMs) ... -
A switched PV approach for extracted maximum power enhancement of PV arrays during partial shading
( Institute of Electrical and Electronics Engineers Inc. , 2015 , Article)This paper proposes a switched photovoltaic (PV) approach to enhance the extracted maximum power from a PV array during partial shading conditions. The proposed system is simple and cost effective. However, it may provide ... -
A voltage-behind-reactance model of five-phase induction machines considering the effect of magnetic saturation
( IEEE , 2013 , Article)Five-phase induction machines are generally modeled using multiple dq planes or using a phase variable model. This paper considers modeling five-phase induction machines using a voltage-behind-reactance (VBR) configuration. ... -
An asymmetrical six-phase induction motor drive based on nine-arm Modular Multilevel Converter (9AMMC) with circulating current suppression
( Institute of Electrical and Electronics Engineers Inc. , 2015 , Conference)Asymmetrical six-phase (dual three-phase) induction motors have received significant attention in high power medium voltage drive applications. Normally, two three-phase voltage source converters are used to supply the ... -
An improved performance direct-drive permanent magnet wind generator using a novel single-layer winding layout
( 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
( 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, ... -
Conceptual study of AC-powered switched non-polarized-capacitors based solid-state bipolar Marx pulse generator
( Institute of Electrical and Electronics Engineers Inc. , 2017 , Article)The conventional unipolar Marx generator can be employed for bipolar pulsed electric field by adding a high-voltage H-bridge at the load side which necessitates stacked switches. Alternatively, bipolar Marx generator with ... -
Effect of stator winding connection of five-phase induction machines on torque ripples under open line condition
( Institute of Electrical and Electronics Engineers Inc. , 2015 , Article)One of the main challenges in designing high-power drive systems is the quality of the developed torque. High-torque-ripple magnitudes result in serious vibration and acoustic noise problems that affect the lifetime of a ... -
Investigation of a New Voltage Balancing Circuit for Parallel-connected Offshore PMSG-based Wind Turbines
( Institute of Electrical and Electronics Engineers Inc. , 2020 , Conference)Parallel connection of wind turbines (WTs) is beneficial in high-power applications. For successful operation of parallel WT-based energy conversion systems, a well-regulated voltage is needed at the collection point. Due ... -
Investigation of three-phase capacitor-tapped multi-module voltage source converter with selective harmonic elimination
( Institute of Electrical and Electronics Engineers Inc. , 2018 , Conference)In conventional Two-Level Voltage Source Converters (2L-VSCs), connecting between high/medium dc voltage and medium/low ac voltage requires semiconductor devices rated at the high/medium dc-voltage, which negatively affects ... -
Modular Multilevel Converter with Self-Energy Equalization for Medium Voltage AC Drive Applications
( Institute of Electrical and Electronics Engineers Inc. , 2021 , Article)The modular multilevel converter (MMC) is a promising candidate for high-/medium-voltage high-power applications such as medium voltage ac drives due to its modularity, reliability, and scalability. The main challenge of ... -
Optimum power transmission-based droop control design for multi-terminal HVDC of offshore wind farms
( IEEE , 2013 , Article)Power generation through wind is expected to play a major role in the world's future energy portfolio. Nevertheless, wind power integration remains a challenging research area due to the special characteristics of wind ...