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Distributed Optimal Voltage Control with Asynchronous and Delayed Communication

Magnússon, Sindri and Qu, Guannan and Li, Na (2020) Distributed Optimal Voltage Control with Asynchronous and Delayed Communication. IEEE Transactions on Smart Grid, 11 (4). pp. 3469-3482. ISSN 1949-3053. doi:10.1109/tsg.2020.2970768.

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The increased penetration of volatile renewable energy into distribution networks necessities more efficient distributed voltage control. In this paper, we design distributed feedback control algorithms where each bus can inject both active and reactive power into the grid to regulate the voltages. The control law on each bus is only based on local voltage measurements and communication to its physical neighbors. Moreover, the buses can perform their updates asynchronously without receiving information from their neighbors for periods of time. The algorithm enforces hard upper and lower limits on the active and reactive powers at every iteration. We prove that the algorithm converges to the optimal feasible voltage profile, assuming linear power flows. This provable convergence is maintained under bounded communication delays and asynchronous communications. We further numerically test the performance of the algorithm using the full nonlinear AC power flow model. Our simulations show the effectiveness of our algorithm on realistic networks with both static and fluctuating loads, even in the presence of communication delays.

Item Type:Article
Related URLs:
URLURL TypeDescription
Magnússon, Sindri0000-0002-6617-8683
Li, Na0000-0001-9545-3050
Additional Information:© 2020 IEEE. Manuscript received July 4, 2019; revised November 2, 2019 and January 22, 2020; accepted January 22, 2020. Date of publication January 31, 2020; date of current version June 19, 2020. This work was supported in part by NSF under Grant 1608509, NSF CAREER under Grant 1553407, and ARPA-E through the NODES program, and in part by the Harvard Climate Change Solution Funds. Paper no. TSG-00949-2019.
Funding AgencyGrant Number
Advanced Research Projects Agency (ARPA)UNSPECIFIED
Harvard UniversityUNSPECIFIED
Subject Keywords:Distributed Optimization, Smart Grid, Voltage Control, Distributed Control
Issue or Number:4
Record Number:CaltechAUTHORS:20200210-131833697
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Official Citation:S. Magnússon, G. Qu and N. Li, "Distributed Optimal Voltage Control With Asynchronous and Delayed Communication," in IEEE Transactions on Smart Grid, vol. 11, no. 4, pp. 3469-3482, July 2020, doi: 10.1109/TSG.2020.2970768.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:101205
Deposited By: Tony Diaz
Deposited On:10 Feb 2020 21:33
Last Modified:16 Nov 2021 18:00

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