Multi-terminal high voltage direct-current (MT-HVdc) technology could be an interesting technology for international submarine interconnectors. Synergies may exist between energy trade and the connection of large-scale offshore wind power to onshore grids, since the capacity utilization of the system can be increased. This paper presents a simplified simulation model of a VSCconnected offshore wind farm for the real-time digital simulator (RTDS). The RTDS works in continuous sustained real-time and is therefore able to perform the simulations fast. The converter bridge is modelled by the assumption of ideal sources. All other components (converter transformer, phase reactors, dc capacitor, etc.) are modelled using their physical representation in standard library blocks. Different operational cases are simulated: normal operation and fault situations in the ac-system. Index Terms — High Voltage Direct Current, Multi-terminal, Offshore Wind, Real-time Digital Simulator, Voltage-Sourced Converter.
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