Results 21 to 30 of about 8,850 (277)

An improved dynamic mode decomposition for real‐time electromechanical oscillation monitoring in power systems: The impact of ultra‐low frequency modes and its removal strategy

open access: yesIET Generation, Transmission & Distribution, 2023
The growing complexity of power systems, driven by the increasing use of renewable energy sources, necessitates efficient real‐time monitoring of electromechanical oscillations, which is crucial for enhancing grid security.
Orlando Delgado Fernández   +2 more
doaj   +2 more sources

Multi-octave frequency comb from an ultra-low-threshold nanophotonic parametric oscillator

open access: yesNature Photonics, 2023
8 pages, 4 ...
Ryoto Sekine   +5 more
openaire   +3 more sources

The Impact of Primary Frequency Control of WTs on Ultra-Low Frequency Oscillation

open access: yesJournal of Physics: Conference Series, 2021
Abstract Since entering the 21st century, as wind power develops rapidly, wind power plays an increasingly important role in the safe and stable operation of power systems. Since the wind turbines under traditional control don’t provide frequency support, the frequency dynamics of the power grids after load disturbance will be ...
Lei Yang   +6 more
openaire   +1 more source

Influence of Hydro Turbine Supervision and Control System on Frequency Characteristics of High Proportion Hydropower System [PDF]

open access: yesE3S Web of Conferences, 2021
With the construction of interconnected power grid and the rapid development of clean energy, the frequency problem of power system is becoming increasingly prominent.
Wang Guanhong   +8 more
doaj   +1 more source

Frequency Oscillation Analysis of Power System With Multiple Governor Deadbands

open access: yesIEEE Access, 2020
In recent years, the ultra-low frequency oscillation of power system is one of the most concerned frequency stability problem. The governor deadband are considered as one of the main influences.
Chengwei Fan   +5 more
doaj   +1 more source

The Mechanism of Ultra-Low Frequency Oscillations With the Same Mode Shapes

open access: yesIEEE Access, 2020
The ultra-low frequency oscillation (ULFO) problem reappears in China recently. Different from the classical low frequency oscillation (LFO), the generators in ULFO have the same mode shapes, namely oscillating in the same pace.
Peng Wang   +5 more
doaj   +1 more source

Characterizing Quantum Effects in Optically Induced Nanowire Self-Oscillations: Coherent Properties

open access: yesPhotonics, 2021
Mechanical properties of metallic-nanowire self-oscillations are investigated through a coherent-state analysis. We focus on elucidating the time behavior of quantum energy in such oscillations, in addition to the analysis of fluctuations, evolution of ...
Jeong Ryeol Choi
doaj   +1 more source

Multi-Mode Lasers for Self-Forced Opto-Electronic Oscillators in Compact Frequency Synthesizers

open access: yesIEEE Journal of Microwaves, 2021
Advanced telecommunication, imaging, and remote sensing systems require reliable ultra-high stability local oscillators. Particularly, coherent detection of digital data signals relies on a low aperture jitter of local oscillators in addition to high ...
Afshin S Daryoush, Tianchi Sun
doaj   +1 more source

Analysis of Mode Interaction in Ultra-low Frequency Oscillation Based on Trajectory Eigenvalue

open access: yesJournal of Modern Power Systems and Clean Energy, 2020
Complex phenomena such as prolongedly undamped ultra-low frequency oscillation (ULFO) and eigenmode re-excitation are observed in the simulations of hydroelectric power systems.
Yusheng Xue, Zijun Bin
doaj   +1 more source

Ultra-low-power second-order nonlinear optics on a chip

open access: yes, 2021
Second-order nonlinear optical processes are used to convert light from one wavelength to another and to generate quantum entanglement. Creating chip-scale devices to more efficiently realize and control these interactions greatly increases the reach of ...
Christopher J. Sarabalis (14383206)   +9 more
core   +1 more source

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