Siemens Energy Global Gmbh & Co. Kg

Maxime Delzenne

Guenter Ebner

Günter Ebner

A method operates an arrangement having a DC transmission link or a DC transmission grid to which at least two converters each having an AC voltage side and a DC voltage side are connected. A grid stabilization device is connected to the AC voltage side of one of the converters, subsequently referred to as near converter. The grid stabilization device has for the purpose of grid stabilization an energy store for the buffer storage of energy and/or an energy consumer for the consumption of electrical energy, and the grid stabilization device is isolated on the grid side from at least one other of the at least two converters, subsequently referred to as a remote converter, by way of the near converter. The grid stabilization device is actuated by at least one control signal that is produced and transmitted to the grid stabilization device by the near or the remote converter.

Arrangement having a DC transmission link or DC transmission grid and method for the operation thereof

An electrical converter has an alternating-voltage side with at least two alternating-voltage terminals and a direct-voltage side. At least two series connections connected in parallel and each forming a converter arm of the converter assigned to one of the alternating-voltage terminals. Circular currents can flow between the series connections. According to the method, a load value describing the thermal load of the converter is calculated based on: an active power current value that indicates the active power current component of a phase current flowing across one of the alternating-voltage terminals; a reactive power current value that indicates the reactive power current component of the phase current flowing across the alternating-voltage terminal; and a circular current value that indicates the magnitude of the circular current(s) flowing between the series connections. The converter is controlled while also taking into account this load value.

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Erfurt, Germany

Maxime Delzenne