Adequacy of Lyapunov Control of Power Systems Considering Modelling Details and Control Indices

Nonlinear excitation controllers for power systems are considered as promising replacements for their linear counterparts, such as power system stabilizers (PSSs). However, Lyapunov based nonlinear controllers currently available in literature have been derived using simplified third order machine d...

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Bibliographic Details
Published in:IEEE transactions on power systems 2023-05, Vol.38 (3), p.2275-2289
Main Authors: Mir, Abdul Saleem, Singh, Abhinav Kumar, Pal, Bikash C., Senroy, Nilanjan, Tu, Junjie
Format: Article
Language:English
Subjects:
Adequacy
Computational modeling
Control systems
Controllers
critical clearing time
Lyapunov
Mathematical models
modal analysis
Nonlinear control
Nonlinear controller
normal-form
Power system dynamics
Power system stability
small signal stability
Stability analysis
Stability criteria
State estimation
Transient analysis
Transient stability
Voltage control
voltage regulation
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Summary:Nonlinear excitation controllers for power systems are considered as promising replacements for their linear counterparts, such as power system stabilizers (PSSs). However, Lyapunov based nonlinear controllers currently available in literature have been derived using simplified third order machine dynamics and have not been tested on realistic power system models, and the costs associated with these controllers have also not been studied. The paper aims to assess the performance of existing Lyapunov controllers for a detailed benchmark power system model. Two new Lyapunov based nonlinear controllers have been derived using IEEE recommended subtransient machine model, and their performance and costs have been compared with existing methods. The controllers have been evaluated using metrics for both small signal stability and transient stability. It has been proven theoretically (via stability analysis) and demonstrated via simulations that proposed Lyapunov controllers are more viable options for control of power system oscillatory dynamics. It has also been demonstrated that detailed subtransient model is required for accurate estimation of states via dynamic state estimation for use in the realization of Lyapunov controllers.
ISSN:0885-8950
1558-0679
DOI:10.1109/TPWRS.2022.3180397