Results 11 to 20 of about 1,283,393 (314)

Enhancing Frequency Control Through Rate of Change of Voltage Feedback [PDF]

IEEE Transactions on Power Systems, 2023
This letter proposes a simple and inexpensive technique to improve the frequency control of distributed energy resources. The proposed control consists in modifying the conventional estimated bus frequency signal with an additional feedback signal that utilizes the rate of change of the voltage magnitude measured at the same bus.
Federico Milano, Bibi Alhanjari, Georgios Tzounas   +2 more
core   +7 more sources

Adaptive active frequency support strategy for receiving-end MMC-HVDC stations based on rate of change of frequency [PDF]

Frontiers in Electronics
As the proportion of HVDC infeed power increases in the eastern receiving-end power grid, inertia and frequency regulation capability decrease. Utilizing modular multilevel converter (MMC) stations at the receiving-end to provide active frequency support
Baoye Tian, Baoye Tian, Junjie Li, Junjie Li, Hefeng Zhai, Hefeng Zhai, Ye Zhang, Ye Zhang   +7 more
doaj   +3 more sources

Using satellite data to assess management frequency and rate of regeneration on heather moorlands in England as a resilience indicator [PDF]

, 2021
Peatland resilience, defined here as the rate of recovery from perturbation, is crucial to our understanding of the impacts of climate change and land management on these unique ecosystems.
Boulton C. A., Buxton, J., Abrams, J. F., Lenton, T. M., Lees, K.   +4 more
core   +1 more source

Developing a Drift Rate Distribution for Technosignature Searches of Exoplanets [PDF]

, 2023
A stable-frequency transmitter with relative radial acceleration to a receiver will show a change in received frequency over time, known as a "drift rate''.
Evan L. Sneed, Isaacson, Howard, He, Matthias Y., Sheikh, Sofia Z., Sofia Z. Sheikh, Li, Megan G., Steve Croft, Howard Isaacson, Christian Gilbertson, Gilbertson, Christian, Sneed, Evan L., Megan G. Li, Matthias Y. He, Croft, Steve   +13 more
core   +2 more sources

Measuring the rate of change of voice fundamental frequency in fluent speech during mental depression [PDF]

, 1988
A method of measuring the rate of change of fundamental frequency has been developed in an effort to find acoustic voice parameters that could be useful in psychiatric research.
Åsa Nilsonne, Sundberg, Johan,, Sten Ternström, Johan Sundberg, Ternström, Sten,, Anders Askenfelt, Nilsonne, Åsa,, Askenfelt, Anders,   +7 more
core   +1 more source

Discrimination of nonlinear frequency glides [PDF]

, 2006
Discrimination thresholds for short duration nonlinear tone glides that differed in glide rate were measured in order to determine whether cues related to rate of frequency change alone were sufficient for discrimination.
Thyer, N, Mahar, Doug P, Mahar, Douglas, Nick Thyer, Thyer, Nick, Doug Mahar   +5 more
core   +1 more source

Fast frequency response of inverter-based resources and its impact on system frequency characteristics

Global Energy Interconnection, 2020
The inertia response and primary frequency regulation capability of synchronous grids are declining owing to the increasing penetration of inverter-based resources.
Lining Su, Xiaohui Qin, Shang Zhang, Yantao Zhang, Yilang Jiang, Yi Han   +5 more
doaj   +1 more source

Issues and mitigations of wind energy penetrated network: Australian network case study

Journal of Modern Power Systems and Clean Energy, 2018
Longest geographically connected Australian power system is undergoing an unprecedented transition, under the effect of increased integration of renewable energy systems.
Asma AZIZ, Aman Maung Than Oo, Alex STOJCEVSKI   +2 more
doaj   +1 more source

Single-Machine Frequency Model and Parameter Identification for Inertial Constraints in Unit Commitment

Energies, 2021
In recent years, the need for generation mixes that consider the inertial constraints in unit commitment (UC) has increased because the inertia of these systems has decreased with the increased use of renewable energy.
Sung-Eun Kim, Yeong-Han Chun
doaj   +1 more source

Tuning of human modulation filters is carrier-frequency dependent [PDF]

, 2013
Recent studies employing speech stimuli to investigate 'cocktail-party' listening have focused on entrainment of cortical activity to modulations at syllabic (5 Hz) and phonemic (20 Hz) rates.
Reiss Joshua D., Reiss, JD, Simpson, AJ, Andrew J R Simpson, Simpson Andrew J. R., Joshua D. Reiss, Simpson, AJR, McAlpine, D, Joshua D Reiss, David McAlpine, Andrew J. R. Simpson, McAlpine David   +11 more
core   +1 more source