18. A REVIEW ON VOLTAGE CONTROL OF MULTI TERMINAL VSC-HVDC TRANSMISSION SYSTEM FOR OFFSHORE WIND POWER PLANT

This paper deals with multiterminal voltage source converter (VSC) HVDC transmission systems for the connection of offshore wind power plants to the main land ac grid. A droop-based control scheme is considered. The droop controllers have been designed base on a mixed sensitivity model by tackling a curved improvement issue with straight network imbalance s. The framework is broke down through recreations and tentatively in a scaled stage. Recreations show the control execution during a breeze speed change and a voltage hang in the principal ac network. Test results include wind power changes (increase and decrease) and an eventual VSC loss (both considering grid-side and wind farm VSC loss). In all the cases, the simulation and the experimental results have shown a good system performance.