US 12,009,738 B2
Assembly having a multilevel power converter
Rodrigo Alonso Alvarez Valenzuela, Nuremberg (DE); and Sebastian Semmler, Nuremberg (DE)
Assigned to Siemens Energy Global GmbH & Co. KG, Erlangen (DE)
Appl. No. 17/611,255
Filed by Siemens Energy Global GmbH & Co. KG, Munich (DE)
PCT Filed May 15, 2019, PCT No. PCT/EP2019/062505
§ 371(c)(1), (2) Date Nov. 15, 2021,
PCT Pub. No. WO2020/228951, PCT Pub. Date Nov. 19, 2020.
Prior Publication US 2022/0231612 A1, Jul. 21, 2022
Int. Cl. H02M 1/32 (2007.01); H02M 7/12 (2006.01); H02M 7/483 (2007.01); H02M 7/757 (2006.01); H02J 3/36 (2006.01)
CPC H02M 1/32 (2013.01) [H02M 7/12 (2013.01); H02M 7/4835 (2021.05); H02M 7/7575 (2013.01); H02J 3/36 (2013.01)] 21 Claims
OG exemplary drawing
 
1. An assembly having a multilevel power converter, comprising:
at least one phase module having a plurality of modules, each with a first electrical module terminal and a second electrical module terminal;
said plurality of modules including modules of a first type, which are configured to output a voltage of exclusively one polarity or zero voltage at said first electrical module terminal and said second electrical module terminal thereof;
said plurality of modules including modules of a second type, which are configured to output a voltage of one polarity, a voltage of opposite polarity, or zero voltage at said first electrical module terminal and said second electrical module terminal thereof; and
a voltage limiting device connected to said at least one phase module and configured to limit a voltage occurring across said modules of the second type depending on the polarity of said voltage; and wherein:
said at least one phase module comprises an AC voltage terminal, a first DC voltage terminal, and a second DC voltage terminal;
said first DC voltage terminal and said second DC voltage terminal are connected to a direct-current transmission link; and
said direct-current transmission link includes two different conductor types that differ from each other with regard to a capacitance per unit length thereof.