Results 91 to 100 of about 3,143,983 (204)
Frequency response of an axial-flow compressor exposed to inlet pressure perturbations [PDF]
Experimental results of a series of engine tests designed to obtain the stage dynamics of an eight-stage axial-flow compressor over the frequency range of 0.5 to 200 hertz are presented.
Milner, E. J. +2 more
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International Journal of Electrical Power & Energy SystemsThis work proposes integrating hybrid energy sources including ultracapacitor (UC) and fuel cell (FC) which are controlled by the virtual synchronous generator (VSG) strategy into a VSG-controlled PMSG-WT to provide frequency support. The UC emulates the
Meysam Hoseintabar Marzebali +2 more
doaj +1 more source
Numerical study of acoustic oscillations and combustion instabilities in solid propellant rocket [PDF]
, 1997 A numerical analysis of unsteady motions in solid rocket motors has been conducted. A fully coupled implicit scheme based on a dual time-stepping integration algorithm has been adopted to solve the governing equations and associated boundary conditions.
Culick, F. E. C., Roh, T. S.
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ElectricityThe high penetration of wind power, photovoltaic, and energy storage not only presents opportunities for green and low-carbon development, but also poses significant challenges to frequency regulation.
Zhengbiao Zhu, Meiling Ma
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Primary Frequency Response and Control of Power System Frequency
, 2018 This report is a supplement to the report Frequency Control Requirements for Reliable Interconnection Frequency Response. To see the main report and all of its supplemental materials, visit https://certs.lbl.gov/project/interconnection-frequency-response.
openaire +1 more source
Some aspects of optical feedback with cadmium sulfide and related photoconductors [PDF]
A primary limitation of many solid state photoconductors used in electro-optical systems is their slow response in converting varying light intensities into electrical signals.
Katzberg, S. J.
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EnergiesWith the increasing integration of wind energy into power systems, maintaining frequency stability has become a significant challenge. To address the issue of secondary frequency drop caused by wind turbines exiting the primary frequency regulation of ...
Ketian Liu +3 more
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Cost-effective primary frequency response at high asynchronous generation levels
, 2013 Restrained generation from wind and solar PV can provide a frequency response that is fast in comparison to conventional generation. However, the reduced inertia in a dispatch with little conventional generation can cause very fast initial drop in the frequency and it may be difficult to mitigate that with wind and solar PV alone.
van Hulle, Frans +4 more
openaire +1 more source
Co-Optimization of Ancillary Services Providing Primary Frequency Control in the Day-Ahead Market
IEEE AccessLarge-scale integration of inverter-based resources (IBRs) challenges primary frequency control because IBRs don’t typically respond to frequency fluctuations, which is partially due to a lack of financial incentives.
Manuel Garcia +3 more
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Contribution of DFIG wind turbines to Primary Frequency Control [PDF]
, 2016 In recent years, worldwide power systems are experiencing a steadily growth in wind power penetration. A common concern in the operation of such systems is related to the frequency stability. Modern variable speed wind turbines have a limited capacity in
Martínez González, Sergio +1 more
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