Browsing by Author "Hayes B.P."

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    Stability Analysis of Virtual Power Plant with Grid Forming Converters
    (Institute of Electrical and Electronics Engineers Inc., 2024) Tozak M.; Taskin S.; Sengor I.; Hayes B.P.
    A virtual power plant is a system containing multiple distributed generators aggregated and flexibly coordinated to act as a single power source. This study investigates the active power, reactive power, frequency, and voltage support provided by a virtual power plant interconnected with the grid. The investigation encompasses the analysis of grid-forming (GFM)-controlled wind and solar power plant units, considering the fluctuating power generation from solar and wind sources. The real hourly wind and solar generation profiles from currently operational plants are used as the active power set points. The stability and power reference tracking of grid-connected converters are analyzed using dispatchable virtual oscillator control (dVOC) and droop control-based methods. The results show that both control strategies substantially improve the virtual power plant's ability to ensure grid stability and accurately track power references, despite the inherent variability of wind and solar energy generation. © 2024 IEEE.
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    Modeling and Control of Grid Forming Converters: A Systematic Review
    (Institute of Electrical and Electronics Engineers Inc., 2024) Tozak M.; Taskin S.; Sengor I.; Hayes B.P.
    In electrical power systems where the proportion of synchronous generators (SG) is gradually decreasing, grid-forming (GFM) converters need to be installed and controlled to meet all the system requirements that SGs have provided to date. Modeling, control, and implementation of GFM converters have been the subject of numerous studies in recent years, particularly in the context of ensuring grid stability during the transition to non-synchronous renewable energy sources. This paper provides a comprehensive literature review on the modeling and control of grid-connected converters. In particular, the focus is placed on GFM-type control structures, objectives, and applications. Both grid-following (GFL) and GFM control structures are detailed. Then, the objectives of controlling GFM converters in power systems are discussed in detail. Finally, some completed and ongoing GFM installation projects around the world are summarized under the subheadings of battery energy storage system (BESS), GFM wind, hybrid, and high voltage direct current (HVDC). © 2013 IEEE.