Combining Advantages of Specialized Simulation Tools and Modelica Models using Functional Mock-up Interface (FMI)

Abstract

In power plant applications, detailed transient analy- sis of the evaporator results in very large fluid sys- tems, i.e. the model consists of many equations. This is because the evaporator has many tubes and the spatial discretization has to be quite fine in order to appropriately model transient evaporation processes. In such cases, due to performance and workflow rea- sons, we use a specialized in-house tool Dynaplant [1]. Coupling between Dynaplant and a Modelica- simulator helps to benefit in addition from the possi- bility of rapid development of new components in Modelica. Here, it is shown, how the Functional Mock-up Unit (FMU) export from a Modelica model can be used to perform a co-simulation with Dynaplant and an FMU simulator. The FMU is defined via the Func- tional Mock-up Interface (FMI) for Model Exchange v1.0 [2]. Advantages but also restrictions and chal- lenges are covered. Keywords: