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arXiv · 2011.06707

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
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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.

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Samuel Chevalier, Federico Martin Ibanez, Kathleen Cavanagh, Konstantin Turitsyn, Luca Daniel, Petr Vorobev. 2020-11-13. Network Topology Invariant Stability Certificates for DC Microgrids with Arbitrary Load Dynamics. https://arxiv.org/abs/2011.06707

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