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Title: Cyber Network Design for Secondary Frequency Regulation: A Spectral Approach

Abstract

We present a preliminary theoretical framework based on spectral graph theory that captures how the cyber topology of a distributed secondary frequency control scheme impacts the stability, optimality, and transient performance of our power system as a cyber-physical network. We show that a collection of polynomials defined in terms of the cyber and physical Laplacian eigenvalues encode information on the interplay between cyber and physical networks. It is demonstrated that to understand the impact of adding cyber connectivity, one should separate the low-damping and high-damping regimes. Although adding cyber connectivity always improves the performance for high-damping systems, it is not the case for low-damping scenarios. Based on the theoretical study, we discuss how a good cyber network should be designed. Our empirical study shows that for practical systems, the number of communication channels that is needed to achieve near-optimal performance is usually less than twice the number of buses.

Authors:
ORCiD logo [1];  [2];  [2]
  1. National Renewable Energy Laboratory (NREL), Golden, CO (United States)
  2. California Institute of Technology
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1478180
Report Number(s):
NREL/CP-5D00-72608
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Conference
Resource Relation:
Conference: Presented at the 2018 Power Systems Computation Conference (PSCC), 11-15 June 2018, Dublin, Ireland
Country of Publication:
United States
Language:
English
Subject:
24 POWER TRANSMISSION AND DISTRIBUTION; frequency control; eigenvalues and eigenfunctions; laplace equations; power system stability; topology; network topology; transmission line matrix methods

Citation Formats

Zhao, Changhong, Guo, Linqi, and Low, Steven H. Cyber Network Design for Secondary Frequency Regulation: A Spectral Approach. United States: N. p., 2018. Web. doi:10.23919/PSCC.2018.8442814.
Zhao, Changhong, Guo, Linqi, & Low, Steven H. Cyber Network Design for Secondary Frequency Regulation: A Spectral Approach. United States. doi:10.23919/PSCC.2018.8442814.
Zhao, Changhong, Guo, Linqi, and Low, Steven H. Thu . "Cyber Network Design for Secondary Frequency Regulation: A Spectral Approach". United States. doi:10.23919/PSCC.2018.8442814.
@article{osti_1478180,
title = {Cyber Network Design for Secondary Frequency Regulation: A Spectral Approach},
author = {Zhao, Changhong and Guo, Linqi and Low, Steven H.},
abstractNote = {We present a preliminary theoretical framework based on spectral graph theory that captures how the cyber topology of a distributed secondary frequency control scheme impacts the stability, optimality, and transient performance of our power system as a cyber-physical network. We show that a collection of polynomials defined in terms of the cyber and physical Laplacian eigenvalues encode information on the interplay between cyber and physical networks. It is demonstrated that to understand the impact of adding cyber connectivity, one should separate the low-damping and high-damping regimes. Although adding cyber connectivity always improves the performance for high-damping systems, it is not the case for low-damping scenarios. Based on the theoretical study, we discuss how a good cyber network should be designed. Our empirical study shows that for practical systems, the number of communication channels that is needed to achieve near-optimal performance is usually less than twice the number of buses.},
doi = {10.23919/PSCC.2018.8442814},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {8}
}

Conference:
Other availability
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