Network Topology Invariant Stability Certificates for DC Microgrids with Arbitrary Load Dynamics

Samuel Chevalier, Federico Martin Ibanez, Kathleen Cavanagh, Konstantin Turitsyn, Luca Daniel, Petr Vorobev

Research output: Contribution to journalArticlepeer-review

Abstract

DC microgrids are prone to small-signal instabilities due to the presence of tightly regulated loads. This paper develops a decentralized stability certificate which is capable of certifying the small-signal stability of an islanded DC network containing such loads. Utilizing a novel homotopy approach, the proposed standards ensure that no system eigenmodes are able to cross into the unstable right half plane for a continuous range of controller gain levels. The resulting ``standards" can be applied to variety of grid components which meet the specified, but non-unique, criteria. These standards thus take a step towards offering plug-and-play operability of DC microgrids. The proposed theorems are explicitly illustrated and numerically validated on multiple DC microgrid test-cases containing both buck and boost converter dynamics.

Original languageEnglish
JournalIEEE Transactions on Power Systems
DOIs
Publication statusPublished - 2021

Keywords

  • Constant power load
  • Load modeling
  • Microgrids
  • microgrids
  • Numerical stability
  • parameterization
  • Power system stability
  • small-signal stability
  • Stability criteria
  • stability criteria
  • Standards
  • Thermal stability

Fingerprint

Dive into the research topics of 'Network Topology Invariant Stability Certificates for DC Microgrids with Arbitrary Load Dynamics'. Together they form a unique fingerprint.

Cite this