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Claes Hillberg

Peter Karl Steimer

Peter Daehler

Bjoern Oedegard

Georg Traxler-Samek

Christoph Schaub

Steve Aubert

Gerhard Linhofer

A power plant, and a method for using an electrical unit therefor are disclosed, wherein, an electrical machine can be connected to a power network via a converter and a block transformer. A method is disclosed for using the electrical unit, wherein the converter disconnects the block transformer from the machine in the event of a malfunction of the block transformer.

Method for using an electric unit

A converter system is provided for the switching of at least three voltage levels and for the switching of two voltage levels. A method is also provided for the operation of a converter system for the switching of at least three voltage levels and for the operation of a converter system for the switching of two voltage levels.

Converter system and method for the operation of such a converter

A method is specified for operating a transformer ( ) from a drivable voltage source ( ), in which the voltage source, ( ) produces an output voltage (u ) for feeding active power and/or a reactive component via the transformer ( ) into an electrical AC voltage supply network ( ), and an output current (i ) from the voltage source ( ) is monitored for a maximum permissible value (i ) in which the magnetic flux (&phgr;) of the transformer ( ) is determined continuously, and, when the maximum permissible value (i ) of the output current (i ) is exceeded, the voltage source ( ) is disconnected from the transformer ( ). In response to a start signal (S ), an output voltage (u ) is formed as a function of a transformer voltage (u ), which was determined most recently before the maximum permissible value (i ) of the output current (i ) was exceeded, and as a function of a first magnetic flux (&phgr; ), which was determined most recently before the maximum permissible value (i ) of the output current (i ) was exceeded, and of a second magnetic flux (&phgr; ) determined at the time of the start signal (S ), the output voltage (u ) being applied to the transformer ( ) for an adjustable time period (T ) after an adjustable switching time (t ). An apparatus is also specified for carrying out the method.

Method for operating a transformer from a drivable voltage source, as well as an apparatus for carrying out the method

The method according to the invention is for compensation currents to be produced which have arbitrary phases and/or arbitrary amplitudes. To this end, a compensation unit (,) is proposed which is connected to the polyphase system via a transformer unit (,). The compensation unit (,) in this case comprises at least a switching unit (,) and an energy storage unit (,), which is connected to the transformer unit (,) via the switching unit (,).

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Möhlin, Switzerland

Claes Hillberg