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A unified framework for frequency control and congestion management

Zhao, Changhong and Mallada, Enrique and Low, Steven H. and Bialek, Janusz (2016) A unified framework for frequency control and congestion management. In: 2016 Power Systems Computation Conference (PSCC). IEEE , Piscataway, NJ, pp. 1-7. ISBN 978-88-941051-2-4.

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The existing frequency control framework in power systems is challenged by lower inertia and more volatile power injections. We propose a new framework for frequency control and congestion management. We formulate an optimization problem that rebalances power, restores the nominal frequency, restores inter-area flows and maintains line flows below their limits in a way that minimizes the control cost. The cost can be squared deviations from the reference generations, minimizing the disruption from the last optimal dispatch. Our control thus maintains system security without interfering with the market operation. By deriving a primal-dual algorithm to solve this optimization, we design a completely decentralized primary frequency control without the need for explicit communication among the participating agents, and a distributed unified control which integrates primary and secondary frequency control and congestion management. Simulations show that the unified control not only achieves all the desired control goals in system equilibrium, but also improves the transient compared to traditional control schemes.

Item Type:Book Section
Related URLs:
URLURL TypeDescription DOIArticle
Zhao, Changhong0000-0003-0539-8591
Mallada, Enrique0000-0003-1568-1833
Low, Steven H.0000-0001-6476-3048
Additional Information:© 2016 IEEE. This work is supported by ARPA-E grant DE-AR0000226, Los Alamos National Lab through DOE grant DE-AC52-06NA25396, DTRA through grant HDTRA 1-15-1-0003, and Skotech through collaboration agreement 1075-MRA.
Funding AgencyGrant Number
Department of Energy (DOE)DE-AC52-06NA25396
Defense Threat Reduction Agency (DTRA)HDTRA 1-15-1-0003
Subject Keywords:Congestion management, distributed control, frequency control
Record Number:CaltechAUTHORS:20160823-102449874
Persistent URL:
Official Citation:C. Zhao, E. Mallada, S. Low and J. Bialek, "A unified framework for frequency control and congestion management," 2016 Power Systems Computation Conference (PSCC), Genoa, Italy, 2016, pp. 1-7. doi: 10.1109/PSCC.2016.7541028 URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:69848
Deposited By: Tony Diaz
Deposited On:23 Aug 2016 17:50
Last Modified:03 Oct 2019 10:25

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