Efficiency and Fault-Ride-Through Performance of a Diode-Rectifier and VSC-Inverter based HVDC Link for Off-shore Wind Farms

Autores UPV
Año
Revista IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS

Abstract

This paper includes a technical feasibility study on the use of a HVDC diode based rectifier together with an onshore voltage source converter for the connection of large offshore wind farms. A distributed control algorithm for the wind farm is used, where all the wind turbines contribute to the offshore grid voltage and frequency control, while allowing wind turbine optimal power tracking. Moreover, the proposed system shows good fault ride-through performance to solid faults at onshore connection point, wind farm ac-grid and HVDC line. The technical feasibility of the proposed solution has been validated by means of detailed PSCAD simulations. The efficiency of the complete system has also been studied and found to compare favorably with that of a VSC-HVDC rectifier station.