公开(公告)号：US10811994B2

公开(公告)日：2020-10-20

申请号：US16603326

申请日：2017-04-05

Applicant: SIEMENS AKTIENGESELLSCHAFT

Inventor： Jan Christoph Stankewitz ,  Ewgenij Starschich ,  Markus Vor Dem Berge

IPC: H02M7/483 ,  H02H7/12 ,  H02M1/32

Abstract: A multi-phase multi-stage power converter includes a phase module having a power converter module formed of two-pole submodules connected in series and having a plurality of semiconductor switches connected in series, an energy store charged and discharged by the semiconductor switches, a bypass switch short-circuiting the energy store upon exceeding a first limit voltage, and a signal input for a blocking signal opening all semiconductor switches. The submodules are protected from overloading in a simpler manner by connecting a module arrester in parallel with the power converter module. The module arrester limits the power converter voltage like a valve upon exceeding a second limit voltage. The module arrester operates in blocking mode below the second limit voltage and in conducting mode above the second limit voltage. A current limiting the power converter voltage flows through the module arrester in conducting mode.

公开(公告)号：US20210194247A1

公开(公告)日：2021-06-24

申请号：US17056496

申请日：2018-05-18

Applicant: Siemens Aktiengesellschaft

Inventor： Andreas Lorenz ,  Ewgenij Starschich ,  Mustafa Baris Karacay

IPC: H02J3/36 ,  H02H3/42 ,  H02H3/16 ,  H02H3/087 ,  H02H3/44 ,  H02H3/02

Abstract: In a method for monitoring a high-voltage DC transmission the following are predefined: an amperage threshold value for an amperage of the high-voltage DC transmission, at least one interval length for time intervals and, for each predefined interval length, a change threshold value for a change in the amperage averaged over time intervals of the interval length. The amperage for each terminal of the high-voltage DC transmission is determined, and a change in the amperage averaged over time intervals of the interval length is determined for each predefined interval length. A DC error is determined if the magnitude of the amperage of at least one terminal is greater than the amperage threshold value or if, for an interval length, the magnitude of the averaged change in the amperage of at least one terminal is greater than the change threshold value predefined for the interval length.