METHOD FOROPERATING AN ELECTRICAL CIRCUIT AND ELECTRICAL CIRCUIT

摘要

A method for operating an electrical circuit, in particular of a converter is described. The circuit, in at least one embodiment, includes a line-side converter that is coupled to a capacitor. The line-side converter includes at least two series connections, each including at least two power semiconductor elements, and each of the at least two series connections being connected parallel to the capacitor. The line-side converter is coupled to an energy supply system. The DC voltage that is present at the capacitor is determined. A maximum voltage is predetermined. If the DC voltage present at the capacitor is determined to be greater than the maximum voltage, then at least two of the power semiconductor elements are switched into their conductive state in such a manner that the capacitor is discharged in the direction of the energy supply system.

主权项

1. A method for operating an electrical circuit inducing a line-side converter coupled to a capacitor, the line-side converter including at least two series connections, each of the at least two series connections including at least two power semiconductor elements and each of the at least two series connections being connected parallel to the capacitor, the line-side converter being further coupled to an energy supply system, the method comprising:
determining a DC voltage being present at the capacitor; switching, when the DC voltage is greater than a maximum voltage, at least two of the power semiconductor elements into a conductive state such that the capacitor is discharged in a direction of the energy supply system; and switching, when the DC voltage equals the maximum voltage, the at least two power semiconductor elements into a non-conductive state such that the capacitor is discharged in a direction of a load.