Abstract

This paper presents a simulation model of a power generation unit consisting of an internal com-bustion engine, a synchronous generator and electrical loads. The internal combustion engine model is primarily based on thermodynamic and mechanical sub-models that describe the processes occurring inside the engine. For the combustion model, a phenomenological modeling approach is applied, in which the injection profile obtained from a coupled hydraulic simulation serves as an input to the combustion model. The synchronous generator is described using a per-unit (PU) based SimscapeTM model. By coupling the two models, the interaction between the internal combustion engine and the synchronous generator is simulated in order to analyze the overall behavior of the power generation unit under various operating conditions. The overall model enables a very accurate prediction of the generator behavior and serves as a basis for the optimization of operating strategies and system configuration. For validation of the simulation model, measurements were carried out on a power generator under varying load conditions. The simulation results show a high level of agreement with the measurement data under dynamic operating conditions.