MULTILINE HVDC STATION WITH MMC AND CSC INPUTS

摘要

It is presented a power converter for transferring power between a first high voltage DC connection being a voltage stiff DC connection, a second high voltage DC connection being a current stiff DC connection and a high voltage AC connection. The power converter comprises a power converter assembly comprising: a first voltage source converter, a first current source converter, and a second voltage source converter, connected serially in the mentioned order between a positive terminal and a negative terminal of the first high voltage DC connection; and a plurality of transformers connected on one side to the high voltage AC connection and on a second side to respective AC sides of converters. The positive terminal of the second high voltage DC connection is connected on to a point between the first current source converter and the first voltage source converter, and the negative terminal of the second high voltage DC connection is connected to a point between the first current source converter and the second voltage source converter.