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Title: Robust Decentralized Secondary Frequency Control in Power Systems: Merits and Trade-Offs

Frequency restoration in power systems is conven- tionally performed by broadcasting a centralized signal to local controllers. As a result of the energy transition, technological advances, and the scientific interest in distributed control and optimization methods, a plethora of distributed frequency control strategies have been proposed recently that rely on communication amongst local controllers. In this paper we propose a fully decentralized leaky integral controller for frequency restoration that is derived from a classic lag element. We study steady-state, asymptotic optimality, nominal stability, input-to-state stability, noise rejection, transient performance, and robustness properties of this controller in closed loop with a nonlinear and multivariable power system model. Here, we demonstrate that the leaky integral controller can strike an acceptable trade-off between performance and robustness as well as between asymptotic disturbance rejection and transient convergence rate by tuning its DC gain and time constant. We compare our findings to conventional decentralized integral control and distributed- averaging-based integral control in theory and simulations.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [1] ;  [5]
  1. Univ. of Groningen, Groningen (Netherlands)
  2. Johns Hopkins Univ., Baltimore, MD (United States). Dept. of Electrical and Computer Engineering
  3. National Renewable Energy Lab. (NREL), Golden, CO (United States). Power Systems Engineering Center
  4. Johns Hopkins Univ., Baltimore, MD (United States). Electrical and Computer Engineering
  5. Federal Inst. of Technology, Zurich (Switzerland). Electrical Engineering and Information Technology
Publication Date:
Report Number(s):
NREL/JA-5D00-71122
Journal ID: ISSN 0018-9286
Grant/Contract Number:
AC36-08GO28308
Type:
Accepted Manuscript
Journal Name:
IEEE Transactions on Automatic Control
Additional Journal Information:
Journal Name: IEEE Transactions on Automatic Control; Journal ID: ISSN 0018-9286
Publisher:
IEEE
Research Org:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S)
Country of Publication:
United States
Language:
English
Subject:
24 POWER TRANSMISSION AND DISTRIBUTION; frequency control; decentralized control
OSTI Identifier:
1485772

Weitenberg, Erik, Jiang, Yan, Zhao, Changhong, Mallada, Enrique, De Persis, Claudio, and Dorfler, Florian. Robust Decentralized Secondary Frequency Control in Power Systems: Merits and Trade-Offs. United States: N. p., Web. doi:10.1109/TAC.2018.2884650.
Weitenberg, Erik, Jiang, Yan, Zhao, Changhong, Mallada, Enrique, De Persis, Claudio, & Dorfler, Florian. Robust Decentralized Secondary Frequency Control in Power Systems: Merits and Trade-Offs. United States. doi:10.1109/TAC.2018.2884650.
Weitenberg, Erik, Jiang, Yan, Zhao, Changhong, Mallada, Enrique, De Persis, Claudio, and Dorfler, Florian. 2018. "Robust Decentralized Secondary Frequency Control in Power Systems: Merits and Trade-Offs". United States. doi:10.1109/TAC.2018.2884650. https://www.osti.gov/servlets/purl/1485772.
@article{osti_1485772,
title = {Robust Decentralized Secondary Frequency Control in Power Systems: Merits and Trade-Offs},
author = {Weitenberg, Erik and Jiang, Yan and Zhao, Changhong and Mallada, Enrique and De Persis, Claudio and Dorfler, Florian},
abstractNote = {Frequency restoration in power systems is conven- tionally performed by broadcasting a centralized signal to local controllers. As a result of the energy transition, technological advances, and the scientific interest in distributed control and optimization methods, a plethora of distributed frequency control strategies have been proposed recently that rely on communication amongst local controllers. In this paper we propose a fully decentralized leaky integral controller for frequency restoration that is derived from a classic lag element. We study steady-state, asymptotic optimality, nominal stability, input-to-state stability, noise rejection, transient performance, and robustness properties of this controller in closed loop with a nonlinear and multivariable power system model. Here, we demonstrate that the leaky integral controller can strike an acceptable trade-off between performance and robustness as well as between asymptotic disturbance rejection and transient convergence rate by tuning its DC gain and time constant. We compare our findings to conventional decentralized integral control and distributed- averaging-based integral control in theory and simulations.},
doi = {10.1109/TAC.2018.2884650},
journal = {IEEE Transactions on Automatic Control},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {1}
}