Optimal power flow in microgrids with energy storage

Yoash Levron, Josep M. Guerrero, Yuval Beck

Research output: Contribution to journalArticlepeer-review

Abstract

Energy storage may improve power management in microgrids that include renewable energy sources. The storage devices match energy generation to consumption, facilitating a smooth and robust energy balance within the microgrid. This paper addresses the optimal control of the microgrid's energy storage devices. Stored energy is controlled to balance power generation of renewable sources to optimize overall power consumption at the microgrid point of common coupling. Recent works emphasize constraints imposed by the storage device itself, such as limited capacity and internal losses. However, these works assume flat, highly simplified network models, which overlook the physical connectivity. This work proposes an optimal power flow solution that considers the entire system: the storage device limits, voltages limits, currents limits, and power limits. The power network may be arbitrarily complex, and the proposed solver obtains a globally optimal solution.

Original languageEnglish
Article number6469193
Pages (from-to)3226-3234
Number of pages9
JournalIEEE Transactions on Power Systems
Volume28
Issue number3
DOIs
StatePublished - 2013
Externally publishedYes

Keywords

  • Distributed generation (DG)
  • energy storage
  • microgrid
  • optimal power flow (OPF)
  • smart grid

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