Control of Offshore DFIG-based Wind Farm Grid with Line-Commutated HVDC Connection

Abstract

The paper considers a control solution for integration of large offshore DFIG-based wind farms with a common collection bus controlled by a STATCOM into the main onshore grid using line-commutated HVDC connection. The main focus of the paper is a mathematically grounded study of the power system interactions that resulted in a plant model appropriate for a formal control design. A design procedure is described and the controlled system is validated using PSCAD/EMTDC simulations confirming high performance of the proposed control strategy in both normal operation conditions and faults