Wind power plant integration in voltage source converter HVdc grids with voltage droop control

Abstract

This paper introduces the use of a diode-based HVdc rectifier for the integration of a large off-shore wind power plant into an existing HVdc voltage source converter-based grid. The proposed control system allows for the wind power plant to energize the complete HVdc grid, in order to contribute to service restoration in the case of a black-out. The system exhibits good response to wind power plant black-start operation, rectifier breaker trip and reclosure, and short-circuit ride through at the on-shore ac-grid. The technical feasibility of the proposed topology has been validated by means of detailed PSCAD simulations using frequency dependent parameters for cable modeling.