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Distributed Optimal Frequency Control Considering a Nonlinear Network-Preserving Model

Wang, Zhaojian and Liu, Feng and Pang, John and Low, Steven and Mei, Shengwei (2019) Distributed Optimal Frequency Control Considering a Nonlinear Network-Preserving Model. In: 2019 IEEE Power & Energy Society General Meeting (PESGM). IEEE , Piscataway, NJ, p. 1. ISBN 978-1-7281-1981-6. https://resolver.caltech.edu/CaltechAUTHORS:20200210-125626205

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Abstract

This paper addresses the distributed optimal frequency control of power systems considering a network-preserving model with nonlinear power flows and excitation voltage dynamics. Salient features of the proposed distributed control strategy are fourfold: i) nonlinearity is considered to cope with large disturbances; ii) only a part of generators are controllable; iii) no load measurement is required; iv) communication connectivity is required only for the controllable generators. To this end, benefiting from the concept of “virtual load demand”, we first design the distributed controller for the controllable generators by leveraging the primal-dual decomposition technique. We then propose a method to estimate the virtual load demand of each controllable generator based on local frequencies. We derive incremental passivity conditions for the uncontrollable generators. Finally, we prove that the closed-loop system is asymptotically stable and its equilibrium attains the optimal solution to the associated economic dispatch problem. Simulations, including small and large-disturbance scenarios, are carried on the New England system, demonstrating the effectiveness of our design.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1109/pesgm40551.2019.8974065DOIArticle
https://resolver.caltech.edu/CaltechAUTHORS:20180809-152132536Related ItemJournal Article
ORCID:
AuthorORCID
Wang, Zhaojian0000-0002-4998-6339
Liu, Feng0000-0003-2279-2558
Pang, John0000-0002-6485-7922
Low, Steven0000-0001-6476-3048
Mei, Shengwei0000-0002-2757-5977
Additional Information:© 2019 IEEE.
Record Number:CaltechAUTHORS:20200210-125626205
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20200210-125626205
Official Citation:Z. Wang, F. Liu, J. Pang, S. Low and S. Mei, "Distributed Optimal Frequency Control Considering a Nonlinear Network-Preserving Model," 2019 IEEE Power & Energy Society General Meeting (PESGM), Atlanta, GA, USA, 2019, pp. 1-1. doi: 10.1109/PESGM40551.2019.8974065
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:101204
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:10 Feb 2020 21:11
Last Modified:10 Feb 2020 21:11

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