Development of a hybrid model for shipboard power systems

In this paper we have described a hybrid automaton based approach towards the development of a simplified Medium Voltage Direct-Current (MVDC) Shipboard Power System (SPS) model. SPS is considered a good subject of hybrid modeling and hybrid control system design as it combines a variety of continuous component dynamics, discrete control actions as well as a variety of switching components. Therefore, a hybrid system model can provide an accurate and effective way to simulate the system and represent the combined behaviors of SPS. Within the hybrid automata model represented in this paper, continuous power system dynamics are modeled in the form of differential algebraic equations (DAEs) and discrete events dynamics are represented by discrete finite automations (DFAs). Simulation results indicate that the proposed modeling scheme is effective and suitable particularly for system-level studies and control algorithm design for MVDC SPS.