Modelling and simulation of diesel electrical aggregate voltage controller with current sink

In the paper modeling and simulation of a diesel motor with speed control system and generator with voltage system as complex, nonlinear and multivariable systems are presented. Mathematical models for every part of a diesel electrical aggregate (diesel motor with its speed control system, synchronous generator, synchronous exciter, self-excited compounding unit, voltage controller and load) are developed and connected in a common model of the aggregate. Based upon these mathematical models of the aggregate, a simulation model is made using the "Matrix/sub x/" simulation software package. The paper also deals with comparison of characteristics seen from the simulation aspect and measurements. Bringing into the model new current sink simulation results, it better matches experimental results. So, this model can be used for selection of the diesel electrical aggregate´s type and for analyzing the quality of load supply.