Siemens Aktiengesellschaft

Siemens Energy Global Gmbh & Co. Kg

Roland Schuster

Henrik Stiesdal

Jesper Moeller

Thomas Hammer

Jörg Dorn

Peter Menke

Dominik Ergin

Joerg Dorn

Hans-Joachim Knaak

Herbert Gambach

Jan Thisted

Christian Schacherer

Volker Hussennether

Thomas Westerweller

Adnan Chaudhry

Torsten Priebe

Changjiang Zhan

Peter Weitzenfelder

Michael HÖLZER

Ben Rennings

An arrangement contains a polyphase transformer which has primary windings and secondary windings. The secondary windings are connected to form a star circuit, the star point of which is connected to earth potential by means of an overvoltage-limiting device. The overvoltage-limiting device has a first overvoltage-limiting component. A switch, which electrically bridges the first overvoltage-limiting component in its closed state, is assigned to the first overvoltage-limiting component.

Star point grounding with overvoltage limitation for a polyphase transformer

A multilevel power converter has at least one phase module with a plurality of modules connected between positive and negative DC voltage connections. The phase module has a first phase module branch connected to the positive DC voltage connection, and a second phase module branch connected to the negative DC voltage connection. Each of the modules has at least two electronic switching elements and an electric energy storage unit. A third phase module branch connects the first phase module branch to the second phase module branch. A switching device connects an AC voltage connection of the multilevel power converter to a first connection node between the first phase module branch and the third phase module branch in a first switch position and connects the AC voltage connection to a second connection node between the third phase module branch and the second phase module branch in a second switch position.

Multilevel power converter

A converter station for the transmission of electrical power has a diode rectifier with a DC terminal and an AC terminal. At least one transformer is connected to the AC terminal. In order to render the converter station as compact as possible, the diode rectifier is arranged in an insulating material.

Converter station with diode rectifier

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Erlangen, Germany

Roland Schuster