Dynamic Reactive Power Control in Offshore HVDC Connected Wind Power Plants.

This paper presents a coordinated reactive power control for a HVDC connected cluster of offshore wind power plants (WPPs). The reactive power reference for the WPP cluster is estimated by an optimization algorithm aiming at minimum active power losses in the offshore AC Grid. For each optimal reactive power set point, the OWPP cluster controller generates reactive power references for each WPP which further sends the AC voltage/reactive power references to the associated WTs based on their available reactive power margin. The impact of faults at different locations in the offshore grid, such as wind turbine (WT) terminal, collector cable, and export cable, on the dynamic voltage profile of the offshore grid is investigated. Furthermore, the dynamic reactive power contribution from WTs from different WPPs of the cluster for such faults has also been studied. [ABSTRACT FROM AUTHOR]