| Abstract |
The simulation of transmission and distribution grids comes with a trade-off between the number ofmodeled components and the modeling depth on the one hand and the simulation speed on the otherhand. An example system of a grid converter of a 2MW full scale converter system is used to showa step-by-step model order reduction. Starting from a detailed switched model the order reduction isshown in two steps. First, the well-known averaging method is used to provide a time-continuous modeland a time-continuous approximation of non-linear effects for the low-frequency range, that are usuallylost due to averaging, are included.In a second step the model order reduction is continued based on the analytical equations of the continuoussystem. An order reduction method for linear systems is applied on a linear, time-invariant subsystemof the converter. The application of mathematical order reduction methods on the full average model revealsthe limitation of these methods for the system in view, which stands in contrast to standard orderreduction examples. An outlook is given on the application of advanced order reduction methods. |
