A Generic Digital Model of Multiphase Synchronous Generator for Shipboard PowerSystem

Electric ship power system loads, such as high power weapons and laser guns require flexible controlled power with high power quality. A multiphase synchronous generator provides high quality power with fewer ripples and a smoother current on the DC side. Improving the modeling and simulation of synchronous generators has been a subject of investigation for several decades. Modeling is traditionally based on the dq reference frame to obtain constant coefficients and to simplify the calculations. In this paper, a multiphase synchronous generator has been modeled. Better modeling of a multiphase machine is needed for shipboard power system analysis. The digital model is developed on the simulation platform of PSCAD/EMTDC, using the implicit integration method as the solver for a set of algebraic-differential-integral equations describing the performance of devices. The validity and accuracy of the modeling algorithm are verified by comparing steady state and transient performance of user-defined model with the standard model.