Development of a Small-Scale Generator Set Model for Local Network Voltage and Frequency Stability Analysis

2007 ◽  
Vol 22 (2) ◽  
pp. 368-375 ◽  
Author(s):  
G. Quinonez-Varela ◽  
A. Cruden
Keyword(s):  
Stability Analysis ◽  
Frequency Stability ◽  
Local Network ◽  
Small Scale

scholarly journals Scalable State-Space Model of Voltage Source Converter for Low-Frequency Stability Analysis

2020 ◽  
Author(s):  
Federico Cecati ◽  
Rongwu Zhu ◽  
Marius Langwasser ◽  
Marco Liserre ◽  
Xiongfei Wang
Keyword(s):  
Stability Analysis ◽  
State Space ◽  
State Space Model ◽  
Low Frequency ◽  
Frequency Stability ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Space Model

Resonant Frequency Stability Analysis of Dielectric Resonators with Tuning Mechanisms

1987 ◽  
Author(s):  
F. Hernandez-Gil ◽  
R. Perez-Leal ◽  
A. Gebauer
Keyword(s):  
Stability Analysis ◽  
Resonant Frequency ◽  
Frequency Stability ◽  
Dielectric Resonators

scholarly journals Wobbly discs – corrugations seen in the dust lanes of edge-on galaxies

2020 ◽  
Vol 495 (4) ◽  
pp. 3705-3714
Author(s):  
Chaitra A Narayan ◽  
Ralf-Jürgen Dettmar ◽  
Kanak Saha
Keyword(s):  
Stability Analysis ◽  
Small Scale ◽  
Host Galaxies ◽  
Lower Mass ◽  
Limited Sample ◽  
Unsharp Masking ◽  
Bending Waves ◽  
First Time ◽  
Larger Sample ◽  
Disc Galaxies

ABSTRACT We report the detection of small-scale bending waves, also known as corrugations, in the dust lanes of five nearby edge-on disc galaxies. This phenomenon, where the disc mid-plane bends to become wavy, just as in warps but on a smaller scale, is seen here for the first time, in the dust lanes running across the discs. Because they are seen in absorption, this feature must be present in the dust disc in the outskirts of these galaxies. We enhance the visibility of these features using unsharp masking, trace the dust mid-plane across the disc, measure the corrugation amplitude by eye and the corrugation wavelength using Fourier analysis. The corrugation amplitude is found to be in the range of 70–300pc and the wavelengths lie between 1 and 5 kpc. In this limited sample, we find that the amplitude of the corrugations tends to be larger for lower mass galaxies, whereas the wavelength of corrugation does not seem to depend on the mass of host galaxies. Linear stability analysis is performed to find out the dynamical state of these dust discs. Based on WKB analysis, we find that the dust corrugations in about half of our sample are stable. Further analysis, on a larger sample would be useful to strengthen the above results.

Frequency stability analysis for inverter dominated grids during system split

2020 ◽  
Vol 188 ◽  
pp. 106550
Author(s):  
Arun Kannan ◽  
Maria Nuschke ◽  
Bogdan-Petru Dobrin ◽  
Diana Strauß-Mincu
Keyword(s):  
Stability Analysis ◽  
Frequency Stability

Frequency Stability Analysis and Control of AC/DC System

2019 ◽  
Author(s):  
Jing Gao ◽  
Ming-Li Zhang ◽  
Yi-He Wang ◽  
Wen-Ying Shang ◽  
Kun Song ◽  
...  
Keyword(s):  
Stability Analysis ◽  
Frequency Stability ◽  
Dc System ◽  
And Control

scholarly journals Low-Frequency Stability Analysis of Inverter-Based Islanded Multiple-Bus AC Microgrids Based on Terminal Characteristics

2020 ◽  
Vol 11 (5) ◽  
pp. 3662-3676 ◽  
Author(s):  
Wenchao Cao ◽  
Yiwei Ma ◽  
Fei Wang ◽  
Leon M. Tolbert ◽  
Yaosuo Xue
Keyword(s):  
Stability Analysis ◽  
Low Frequency ◽  
Frequency Stability

Frequency stability of a small scale HF cw laser

1981 ◽  
Vol 52 (10) ◽  
pp. 6059-6063 ◽  
Author(s):  
L. Bertrand ◽  
J‐P. Monchalin ◽  
R. Pitre ◽  
J.M. Gagné
Keyword(s):  
Frequency Stability ◽  
Small Scale ◽  
Cw Laser

scholarly journals A Comprehensive Model to Predict Simplex Atomizer Performance

1999 ◽  
Vol 121 (2) ◽  
pp. 285-294 ◽  
Author(s):  
Y. Liao ◽  
A. T. Sakman ◽  
S. M. Jeng ◽  
M. A. Jog ◽  
M. A. Benjamin
Keyword(s):  
Stability Analysis ◽  
Film Thickness ◽  
Linear Stability ◽  
Linear Stability Analysis ◽  
Density Ratio ◽  
Spray Angle ◽  
Small Scale ◽  
Finite Volume Scheme ◽  
Axial Component ◽  
Liquid Sheets

The pressure swirl atomizer, or simplex atomizer, is widely used in liquid fuel combustion devices in the aerospace and power generation industries. A computational, experimental, and theoretical study was conducted to predict its performance. The Arbitrary-Lagrangian-Eulerian method with a finite-volume scheme is employed in the CFD model. Internal flow characteristics of the simplex atomizer, as well as its performance parameters such as discharge coefficient, spray angle and film thickness, are predicted. A temporal linear stability analysis is performed for cylindrical liquid sheets under three-dimensional disturbances. The model incorporates the swirling velocity component, finite film thickness and radius that are essential features of conical liquid sheets emanating from simplex atomizers. It is observed that the relative velocity between the liquid and gas phases, density ratio and surface curvature enhance the interfacial aerodynamic instability. The combination of axial and swirling velocity components is more effective than only the axial component for disintegration of liquid sheet. For both large and small-scale fuel nozzles, mean droplet sizes are predicted based on the linear stability analysis and the proposed breakup model. The predictions agree well with experimental data at both large and small scale.

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