Siemens Aktiengesellschaft

Siemens Energy Global Gmbh & Co. Kg

Marcus Zeller

Klaus Würflinger

Klaus Wuerflinger

Gerald Franz Giering

Dominik Schuster

Ulrich Halfmann

Christian Blug

Guenter Ebner

Kai Trunk

Alexander Broy

Matthias Foehr

Li Shang-Jaeger

David DÖRING

Günter Ebner

Li Shang-JÄGER

A device for preparing a high-voltage direct current transmission includes a first busbar which is connectable to a plurality of first energy generation or consumer units and a second busbar which is connectable to a plurality of second energy generation or consumer units. A transformer system includes a first primary coil which is connectable to the first busbar, a second primary coil which is connectable to the second busbar, and a secondary coil system which is inductively coupled to the first primary coil and the second primary coil to transform power routed on the first and second busbars to increased AC voltage. A converter system is connected to the secondary coil system to convert the increased AC voltage into DC voltage for the high-voltage direct current transmission. A converter station and an energy providing system are also provided.

Device for preparing a high-voltage direct current transmission, converter station and energy providing system

A method and a device provide protection for a multi-terminal HVDC grid against faults. The method includes measuring a DC displacement voltage having a polarity and a value, determining if a short circuit fault exists by comparing the DC displacement voltage with a threshold displacement voltage and identifying a fault type based on the polarity and the value of the DC displacement voltage. The disclosed device contains a converter having a positive pole and a negative pole, a DC-switch substation, a DC line connecting the converter and the DC-switch substation and a transient fault detector. The transient fault detector contains a positive voltage sensor sensing a positive transient voltage of the positive pole and a negative voltage sensor sensing a negative transient voltage of the negative pole and a control unit which is adapted to derive a DC displacement voltage from the positive and the negative transient voltages.

Transient protection for multi-terminal HVDC grid

Growing community of inventors

Erlangen, Germany

Marcus Zeller