1 research outputs found
Large-Signal Stability Criteria in DC Power Grids with Distributed-Controlled Converters and Constant Power Loads
The increasing adoption of power electronic devices may lead to large
disturbance and destabilization of future power systems. However, stability
criteria are still an unsolved puzzle, since traditional small-signal stability
analysis is not applicable to power electronics-enabled power systems when a
large disturbance occurs, such as a fault, a pulse power load, or load
switching. To address this issue, this paper presents for the first time the
rigorous derivation of the sufficient criteria for large-signal stability in DC
microgrids with distributed-controlled DC-DC power converters. A novel type of
closed-loop converter controllers is designed and considered. Moreover, this
paper is the first to prove that the well-known and frequently cited
Brayton-Moser mixed potential theory (published in 1964) is incomplete. Case
studies are carried out to illustrate the defects of Brayton-Moser mixed
potential theory and verify the effectiveness of the proposed novel stability
criteria