Model-based monitoring an operation of a converter

摘要

A converter 11 comprises an alternating current side with three alternating current phases and an electric load 13 is connected to the three alternating current phases. Electric phase currents of the phases are measured and the measurement results are used to control the operation of the converter 11. A mathematical model, which is capable of modelling an operation of the electric load 13 is used to calculate the phase currents and it is checked with the calculated values whether at least one of the electric phase currents and/or a corresponding measured current value is plausible and/or is leading to plausible results of the operation of the converter 11. The converter may be supplying a driving motor of a rail vehicle.