Quasistationary AC Analysis Using Phasor Description With Modelica

The investigation of large technical systems by simu-lating long time periods requires very effective methods. If only sinusoidal quantities occur in the electrical domain, phasor analysis can be used to de-scribe the steady-state behaviour of this part of the physical system. In this paper, modelling of AC cir-cuits and electromechanical drives with electrical AC subsystems is presented using the well-known phasor method within Modelica. To this end, some funda-mentals concerning phasor description are repeated before a possible implementation of AC circuits with-in Modelica is proposed. This implementation uses a new Modelica-library which is still under construc-tion. The main content of this library is introduced. Furthermore, some statements are given concerning the library’s usage when coupling with other domains or with transient submodels, or when switching be-tween transient and phasor analysis, respectively. Finally, three examples are presented