A multivariable modeling approach for the design of Power Electronics Based DC Distribution Systems in diesel-electric vessels

Abstract

The benefits of using Power Electronics Based DC Distribution Systems in diesel-electric vessels are well known. However, some aspects must be deeply analyzed to guarantee a safe, robust and stable system by design. A multivariable DC Distribution System mathematical model is presented and described in this work, where all the transmission lines and filters impedances are considered. The model has been tackled under a holistic approach in which the average small signal model of the drives/converters can be easily added and `connected' to the main grid model. The stability and signal power quality analysis, as well as the design of controls and active damping strategies can be conducted through this mathematical model at low computational cost. The usefulness of this model in the early design stages is thus presented in this paper through its application over a realistic design scenario.