Electromagnetic Transient Modeling of Power Electronics in Modelica, Accuracy and Performance Assessment

This paper presents the Electromagnetic Transient (EMT) modeling and simulation of power electronics in Modelica, a declarative equation-based language. In this paper, modeling of switching components such as diodes, insulated-gate bipolar transistors (IGBT) and multi-level converters using ideal and nonideal components are investigated. A three-phase three-level and a single-phase two-level converter with an open-loop controller are simulated in Modelica and EMTP®. The accuracy and performance of simulations are compared using the variable and fixed-step solvers. Analytical solutions are used for verification of results as well.