Grid-connected VSC-HVDC wind farm system and control using permanent magnet induction generators

In this paper the use of the permanent magnet induction generator (PMIG) as a direct drive, direct online solution for wind energy conversion is considered. A wind farm system with several PMIGs connected to a single voltage source converter (VSC) is proposed. This VSC forms part of a utility grid-connected HVDC transmission system. A PMIG model and control strategies for the VSCs are derived. A 3 MW wind farm consisting of ten 300 kW PMIGs are simulated to demonstrate the dynamic operation of the system.