Distributed Controllers Seeking AC Optimal Power Flow Solutions Using ADMM

Emiliano Dall-Anese, Yijian Zhang, Mingyi Hong, Sairaj Dhople, Zi Xu

Research output: Contribution to journalArticlepeer-review

47 Scopus Citations

Abstract

This paper focuses on power distribution systems with inverter-interfaced renewable energy sources (RESs), and develops a distributed control framework to steer the RES output powers to solutions of ac optimal power flow (OPF) problems. The design of the distributed control algorithm is based on suitable linear approximation of the ac power-flow equations, and leverages the so-called alternating direction method of multipliers (ADMM). Convergence of the RES-inverter output powers to solutions of the approximate ac OPF problem is established under suitable conditions on the mismatches between the commanded setpoints and actual RES output powers. Overall, since the proposed scheme can be cast as an ADMM with inexact primal and dual updates, the convergence results can be applied to more general distributed optimization settings.
Original languageAmerican English
Pages (from-to)4525-4537
Number of pages13
JournalIEEE Transactions on Smart Grid
Volume9
Issue number5
DOIs
StatePublished - 2018

NREL Publication Number

  • NREL/JA-5D00-67745

Keywords

  • ADMM
  • distributed algorithms
  • distribution systems
  • optimal power flow
  • renewable energy sources

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