Time-Scale Separation in Power System Swing Dynamics: Singular Perturbations and Coherency

2021 ◽  
pp. 2325-2329
Author(s):  
Joe H. Chow
Keyword(s):  
Power System ◽  
Singular Perturbations ◽  
Time Scale ◽  
Scale Separation ◽  
Time Scale Separation

scholarly journals On Singular Perturbations of Flexible and Variable-Speed Wind Turbines

2012 ◽  
Vol 2012 ◽  
pp. 1-12 ◽  
Author(s):  
R. Oulad Ben Zarouala ◽  
C. Vivas ◽  
J. Á. Acosta ◽  
L. El Bakkali
Keyword(s):  
Singular Perturbations ◽  
Time Scale ◽  
Reduced Model ◽  
Physical Parameters ◽  
Scale Separation ◽  
Reduced Order ◽  
Physical Mechanisms ◽  
Time Scale Separation ◽  
Successful Approach ◽  
Mechanical Dynamics

A model for the mechanical dynamics of a wind turbine is developed, which is the composition of three physical mechanisms: flexion, torsion, and rotational dynamics. A first contribution is the identification of the essential physical parameters that provide a time-scale separation of these three mechanisms. Under the assumption of singular perturbations the time-scale separation allows to work with a reduced model of order one. This reduction has been essential for the control of this system allowing to control designers to take into account only the reduced-order model. A second contribution consists in employing a measurement of the fore-aft nacelle acceleration with the reduced model, together with a Kalman filter to estimate the flexible DOFs of the system (tower and average blade deflection). The successful approach is tested on high-order nonlinear aeroelastic simulator (FAST).

Singular Perturbation Modeling of Nonlinear Processes with Non Explicit Time-Scale Separation

1996 ◽  
Vol 29 (1) ◽  
pp. 5799-5804 ◽  
Author(s):  
Aditya Kumar ◽  
Panagiotis D. Christofides ◽  
Prodromos Daoutidis
Keyword(s):  
Singular Perturbation ◽  
Time Scale ◽  
Nonlinear Processes ◽  
Scale Separation ◽  
Time Scale Separation
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