Siemens Energy Global Gmbh & Co. Kg

Siemens Aktiengesellschaft

Kunal Sharma

German Kuhn

Alexander Rentschler

Martin Pieschel

Rainer Gruber

Friedemann Augsburger

Felix Kammerer

Michael Beck

Wilfried Hofmann

Christian Pfeifer

Lutz Hanel

Priyanka Gugale

Michael Karl

Maximilian Dürre

Juan Pablo Ricon Castejon

Jens Rosendahl

Nicol Hildebrand

Martin Leubner

Nico Remus

Juan Pablo Rincon Castejon

A device controls a power flow in an AC network and has a series converter with a DC side to connect to a DC link and an AC side to connect to the AC network via a series transformer. The device further has a bridging arrangement between the series transformer and the series converter configured to bridge the series converter. The bridging arrangement contains at least one bridging branch having a switching unit with antiparallel thyristors and a resistance in series with the switching unit. Furthermore, a method of operation operates the device.

Converter arrangement and method of operation for said converter arrangement

A system contains a double fed induction machine having a stator and a rotor, a fly wheel coupled to the rotor, and a control device for providing a rotor voltage and a rotor current to the rotor. The control device is connected to the rotor and the stator and is capable of generating the rotor voltage and rotor current in response to an electrical signal that is applied to the stator. The control device has a multilevel converter and a control unit for controlling the multilevel converter.

Systems containing a double fed induction machine and a fly wheel, and methods of operating such systems

An arrangement contains an asynchronous machine having a rotor and a stator. The arrangement is set up in a generator mode for feeding electrical energy into an AC voltage network. The arrangement is characterized in that the asynchronous machine can be doubly fed. The asynchronous machine can be connected in a matrix configuration to the AC voltage network by a modular multi-level converter, and the modular multi-level converter is set up in a motor mode of the arrangement for starting up the asynchronous machine while short-circuiting the rotor or the stator.

Arrangement comprising an asynchronous machine and method for operating same

A current-limiting circuit for limiting the magnitude of an alternating current. The circuit includes a coil unit and a capacitor unit, which are connected electrically in series, and a bypass device for electrically bridging the capacitor unit on occasion of an overcurrent. The bypass device has a first bypass branch and a second bypass branch connected electrically in parallel with the first bypass branch. A third bypass branch is connected electrically in parallel with a second bypass element of the second bypass branch.

Current limiting circuit for limiting the magnitude of an alternating current

A converter arrangement converts an alternating input voltage having an input frequency into an alternating output voltage having an output frequency. The converter arrangement includes a direct converter on an input side having a plurality of input terminals and input-side converter units, transformers, the number of which matches the number of input terminals, and a direct converter on an output side having output-side converter units, and a number of output terminals, which number matches the number of input terminals. Each transformer is connected on the primary side to each input terminal via one each input-side converter unit, and is connected on the secondary side to each output terminal via one each output-side converter unit.

Modular matrix AC/AC multipoint converter having higher-frequency transformers

An arrangement contains an asynchronous machine, which, in generator operation, is configured to feed electric power into an AC network. Accordingly, the asynchronous machine can be dual-fed by a modular multi-stage converter in a matrix configuration. The asynchronous machine has a rotor and the modular multi-stage converter is connected to the rotor of the asynchronous machine.

Arrangement for injecting electric power into an AC network by means of an asynchronous machine, and method for operating the asynchronous machine

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Erlangen, Germany

Kunal Sharma