CPC H02M 1/0009 (2021.05) [H02M 1/0016 (2021.05); H02M 1/44 (2013.01)] | 19 Claims |
1. A method for operation of an electrical supply device, which is connected on a network side to an electrical supply network and includes a frequency converter having a network-side power converter and an intermediate circuit, and a network filter, which is connected upstream of the network-side power converter, said method comprising:
during a pulse-blocking operating state of the frequency converter, checking for the presence of a dangerous state of the network filter; and
only in the presence of the dangerous state, actuating only the network-side power converter such that a network perturbation causing the dangerous state of the network filter is at least damped to protect the network filter from the dangerous state.
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