Frequency Oscillation Analysis of Power System With Multiple Governor Deadbands
IEEE 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
IEEE 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
Photonics, 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
IEEE 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
Journal 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 frequency photocurrent self-oscillation in strained InxGa1-xAs quantum well diodes
, 2007 Ultra-low frequency photocurrent (PC) self-oscillation has been investigated in a In0.15Ga0.85As/Al0.15Ga0.85As quantum-well (QW) diode in details as a function of temperature, excitation power and wavelength.
Sano, N, Tanigawa, K, Fujiwara, Kenzo
core +2 more sources
Tutorial on optoelectronic oscillators
APL Photonics, 2021 Microwave photonic approaches for the generation of microwave signals have attracted substantial attention in recent years, thanks to the significant advantages brought by photonics technology, such as high frequency, large bandwidth, and immunity to ...
Ming Li, Tengfei Hao, Wei Li, Yitang Dai
doaj +1 more source
Journal of Modern Power Systems and Clean Energy, 2023 This paper proposes a robust and computationally efficient control method for damping ultra-low frequency oscillations (ULFOs) in hydropower-dominated systems.
Guozhou Zhang +6 more
doaj +1 more source
Modulation of NTC frequencies by Pc5 ULF pulsations : experimental test of the generation mechanism and magnetoseismology of the emitting surface [PDF]
, 2009 Nonthermal continuum (NTC) radiation is believed to be emitted by the conversion of an electrostatic wave into an electromagnetic one, which takes place at the Earth's magnetic equator.
Le Rouzic, G. +8 more
core +1 more source
Frequency dependent topological patterns of resting-state brain networks. [PDF]
PLoS ONE, 2015 The topological organization underlying brain networks has been extensively investigated using resting-state fMRI, focusing on the low frequency band from 0.01 to 0.1 Hz.
Long Qian +5 more
doaj +1 more source