US 11,671,000 B2
Method for operating an electrical supply device and electrical supply device
Benno Weis, Hemhofen (DE)
Assigned to SIEMENS AKTIENGESELLSCHAFT, Munich (DE)
Appl. No. 17/416,297
Filed by Siemens Aktiengesellschaft, Munich (DE)
PCT Filed Oct. 30, 2019, PCT No. PCT/EP2019/079641
§ 371(c)(1), (2) Date Jun. 18, 2021,
PCT Pub. No. WO2020/126180, PCT Pub. Date Jun. 25, 2020.
Claims priority of application No. 18214039 (EP), filed on Dec. 19, 2018.
Prior Publication US 2022/0077758 A1, Mar. 10, 2022
Int. Cl. H02M 1/00 (2006.01); H02M 1/44 (2007.01)
CPC H02M 1/0009 (2021.05) [H02M 1/0016 (2021.05); H02M 1/44 (2013.01)] 19 Claims
OG exemplary drawing
 
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.