Coordinated control strategy for multi-terminal VSC-HVDC based wind farm interconnection

For wind farms in near sea, in which doubly-fed induction generator (DFIG) runs, located at different site respectively, multi-terminal VSC-HVDC (Voltage Source Converter based HVDC) helps to resolve connection for each other and transmitting electrical power into main grid. The paper models wind farms, VSC-HVDC, designs control system and specially takes their control together into account in order to get a coordinated control strategy for grid, wind farm and VSC-HVDC. Simulation is done on PSCAD/EMTDC in the case of normal and faulty running respectively. The response results validate correctness and effectiveness of coordinated control strategy and controllers.