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Swing dynamics as primal-dual algorithm for optimal load control

Zhao, Changhong and Topcu, Ufuk and Low, Steven (2012) Swing dynamics as primal-dual algorithm for optimal load control. In: IEEE Third International Conference on Smart Grid Communications. IEEE , Piscataway, NJ, pp. 570-575. ISBN 978-1-4673-0910-3.

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In electricity transmission networks, loads can provide flexible, fast responsive, and decentralized sources for frequency regulation and generation-demand balancing, complementary to generation control. We consider an optimal load control (OLC) problem in a transmission network, when a disturbance in generation occurs on an arbitrary subset of the buses. In OLC, the frequency-insensitive loads are reduced (or increased) in real-time in a way that balances the generation shortfall (or surplus), resynchronizes the bus frequencies, and minimizes the aggregate disutility of load control. We propose a frequency-based load control mechanism and show that the swing dynamics of the network, together with the proposed mechanism, act as a decentralized primal-dual algorithm to solve OLC. Simulation shows that the proposed mechanism can resynchronize the bus frequencies, balance demand with generation and achieve the optimum of OLC within several seconds after a disturbance in generation. Through simulation, we also compare the performance of the proposed mechanism with automatic generation control (AGC), and discuss the effect of their incorporation.

Item Type:Book Section
Related URLs:
URLURL TypeDescription DOIArticle
Zhao, Changhong0000-0003-0539-8591
Low, Steven0000-0001-6476-3048
Additional Information:© 2012 IEEE. This work is supported by NSF NetSE grant CNS 0911041, ARPA-E grant DE-AR0000226, Southern California Edison, National Science Council of Taiwan, R.O.C. grant NSC 101- 3113-P-008-001, Resnick Institute, and Okawa Foundation.
Group:Resnick Sustainability Institute
Funding AgencyGrant Number
NSF NetSECNS-0911041
Southern California EdisonUNSPECIFIED
National Science Council (Taipei)NSC 101-3113-P-008-001
Resnick Sustainability InstituteUNSPECIFIED
Okawa FoundationUNSPECIFIED
Record Number:CaltechAUTHORS:20130828-101518387
Persistent URL:
Official Citation:Changhong Zhao; Topcu, U.; Low, S., "Swing dynamics as primal-dual algorithm for optimal load control," Smart Grid Communications (SmartGridComm), 2012 IEEE Third International Conference on , vol., no., pp.570,575, 5-8 Nov. 2012 doi: 10.1109/SmartGridComm.2012.6486046
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:40970
Deposited By: Tony Diaz
Deposited On:29 Aug 2013 23:31
Last Modified:10 Nov 2021 04:24

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