Abstract

Power-electronics-based Medium Voltage Direct Current (MVDC) shipboard power systems, consisting of several interconnected feedback-controlled switching converters, suffer from potential degradation of stability induced by negative incremental resistances due to the presence of constant power loads (CPLs). To tackle such a problem, we propose a system-level stabilizing control methods acting on the source side converters. It relies on the Port Controlled Hamiltonian (PCH) representation of a Buck Converters. Based on this approach an Interconnection and Damping Assignment Passivity Based Control (IDA-PBC) law is designed. Simulation results for a MVDC Microgrid using converter switching models confirm the correctness and effectiveness of the designed controller while evaluating him against the well research Linearizing State Feedback (LSF).

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