تصفح حسب المؤلف "Adam, G.P."
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A DC autotransformer design for medium and high voltage DC transmission systems
Gowaid I.A.; Adam G.P.; Williams B.W.; Massoud A.M.; Ahmed S. ( Institute of Electrical and Electronics Engineers Inc. , 2018 , Conference Paper)This paper studies a dc-dc converter topology dual to the ac autotransformer for medium and high voltage dc-dc conversion. Operation with trapezoidal modulation is analyzed where the dc autotransformer is built of ... -
A Novel Converter Station Structure for Improving Multiterminal HVDC System Resiliency Against AC and DC Faults
Wang, S.; Ahmed, K.H.; Adam, G.P.; Massoud, Ahmed; Williams, B. W. ( Institute of Electrical and Electronics Engineers Inc. , 2020 , Article)In an effort to minimize the power disruption between a dc grid and ac grids that host power converters during ac and dc network faults, this paper proposes a novel converter station structure to improve ac and dc fault ... -
A state of the art review of control techniques for power electronics converter based distributed generation systems in different modes of operation
Ahmed, K.H.; Massoud, Ahmed; Adam, G.P.; Zobaa , A. F. ( IEEE Computer SocietyIEEE , 2013 , Conference Paper)This paper presents an overview of the state of the art techniques in inverter-based distribution generation systems. Different control techniques and classification of inverter modules operated in grid and islanded modes ... -
Analysis and Assessment of Modular Multilevel Converter Internal Control Schemes
Wang, S.; Adam, G.P.; Massoud, Ahmed; Holliday, D.; Williams, B. W. ( Institute of Electrical and Electronics Engineers Inc. , 2020 , Article)Adoption of distributed submodule (SM) capacitors in a modular multilevel converter (MMC) necessitates complex controllers to ensure the stability of its internal dynamics. This paper presents comprehensive analysis and ... -
Hybrid and modular multilevel converter designs for isolated HVDC-DC converters
Gowaid I.A.; Adam G.P.; Massoud A.M.; Ahmed S.; Williams B.W. ( Institute of Electrical and Electronics Engineers Inc. , 2018 , Article)Efficient medium and high-voltage dc-dc conversion is critical for future dc grids. This paper proposes a hybrid multilevel dc-ac converter structure that is used as the kernel of dc-dc conversion systems. Operation of the ... -
Modular multilevel structure of a high power dual active bridge DC transformer with stepped two-level output
Gowaid, I.A.; Adam, G.P.; Massoud, Ahmed; Ahmed, S.; Holliday, D.; Williams, B.W.... more authors ... less authors ( Institute of Electrical and Electronics Engineers Inc. , 2014 , Conference Paper)This paper addresses the issues of dc voltage matching and dc fault protection in potential super-grids. An approach for high power dc-dc conversion is proposed and analyzed. A front-to-front connection of modular-multilevel ... -
Quasi two-level operation of modular multilevel converter for use in a high-power DC transformer with DC fault isolation capability
Gowaid, I. A.; Adam, G. P.; Massoud, Ahmed; Ahmed, S.; Holliday, D.; Williams, B. W.... more authors ... less authors ( Institute of Electrical and Electronics Engineers Inc. , 2015 , Article)DC fault protection is one challenge impeding the development of multiterminal dc grids. The absence of manufacturing and operational standards has led to many point-to-point HVDC links built at different voltage levels, ... -
Quasi two-level PWM operation of a nine-arm modular multilevel converter for six-phase medium-voltage motor drives
Diab M.S.; Adam G.P.; Williams B.W.; Massoud A.M.; Ahmed S. ( Institute of Electrical and Electronics Engineers Inc. , 2018 , Conference Paper)This paper proposes a hybrid converter for medium-voltage six-phase machine drive systems that mixes the operation of a traditional two-level voltage-source inverter and the modular multilevel converter (MMC) to enable ... -
The transition arm multilevel converter - A concept for medium and high voltage DC-DC transformers
Gowaid, I.A.; Adam, G.P.; Williams, B.W.; Massoud, Ahmed; Ahmed, S. ( Institute of Electrical and Electronics Engineers Inc. , 2015 , Conference Paper)This paper proposes a dc/ac converter topology where each phase leg comprises a conventional series switch valve in one arm and a series connection of half-bridge chopper cells in the other arm. Operation with trapezoidal ...