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

Autor: Chevalier, Samuel, Ibanez, Federico Martin, Cavanagh, Kathleen, Turitsyn, Konstantin, Daniel, Luca, Vorobev, Petr
Rok vydání: 2020
Předmět:
Druh dokumentu: Working Paper
Popis: 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.
Databáze: arXiv