公开(公告)号：EP4439964A1

公开(公告)日：2024-10-02

申请号：EP23165757.8

申请日：2023-03-31

申请人： Hitachi Energy Ltd

发明人： Hafner, Ying-Jiang ,  Kumar-Nayak, Khirod ,  Sahu, Malaya Kumar ,  Abdalrahman, Adil ,  Nami, Ashkan

IPC分类号： H02M7/5387 ,  H02M7/757 ,  H02M1/00 ,  H02J3/36

CPC分类号： H02M7/5387 ,  H02M7/7575 ,  H02M1/0003 ,  H02M1/0025 ,  H02J3/36

摘要： A converter station is provided comprising at least two converters, including a first voltage source converter and a second voltage source converter. The converter station is configured to be connected to a direct current (DC) system and to an alternating current (AC) system. The converter station further comprises converter control units connected to the first voltage source converter and to the second voltage source converter, respectively. The converter control units obtain phase currents of the first and second voltage source converters, respectively. Each converter control unit comprises a damping controller, which in turn comprises a regulator. The damping controllers determine current differences between the phase currents of the two converter stations and generate damping control signals by means of the regulators, which multiply the current differences with a gain to generate damping control signals. The converter control units combine the damping control signals with respective converter reference voltages, thereby providing modified converter reference voltages for the voltage source converters.