EP 3994792 A1 20220511 - METHOD FOR PRECHARGING MODULES OF A MODULAR MULTILEVEL CONVERTER
Title (en)
METHOD FOR PRECHARGING MODULES OF A MODULAR MULTILEVEL CONVERTER
Title (de)
VERFAHREN ZUM VORLADEN VON MODULEN EINES MODULAREN MULTILEVELSTROMRICHTERS
Title (fr)
PROCÉDÉ DE PRÉCHARGE DE MODULES D'UN CONVERTISSEUR MULTINIVEAU MODULAIRE
Publication
Application
Priority
EP 2019072860 W 20190827
Abstract (en)
[origin: WO2021037346A1] The invention relates to a method for precharging half bridge modules and full bridge modules of a modular multilevel converter (400), the modular multilevel converter (400) having at least one phase module branch (18) with half bridge modules (3_1, 3_2, 3_3) and full bridge modules (3_4, 3_5, 3_6, 3_7) connected electrically in a series circuit, and each of the half bridge modules (3_1, 3_2, 3_3) and full bridge modules (3_4, 3_5, 3_6, 3_7) having at least a first module connection (212), a second module connection (215, 315), two electronic switching elements (202, 206) and an electrical stored energy source (210). In the method, in a first charging phase (501) after the multilevel converter (400) is connected to an energy supply system (409) with the electronic switching elements (202, 206, 302, 306) of the half bridge modules and of the full bridge modules not actuated, the stored energy sources (210) of the half bridge modules and of the full bridge modules are charged up in an uncontrolled manner. In a second charging phase (502), the electronic switching elements (202, 206, 302, 306) of at least some of the full bridge modules (3_5, 3_6, 3_7) are actuated such that the half bridge modules (3_1, 3_2, 3_3) are charged up further.
IPC 8 full level
H02M 1/36 (2007.01)
CPC (source: EP US)
H02M 1/08 (2013.01 - US); H02M 1/36 (2013.01 - EP US); H02M 7/4835 (2021.05 - EP US); H02M 7/53871 (2013.01 - US); H02M 7/483 (2013.01 - EP US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2021037346 A1 20210304; EP 3994792 A1 20220511; US 2022302852 A1 20220922
DOCDB simple family (application)
EP 2019072860 W 20190827; EP 19769032 A 20190827; US 201917638949 A 20190827