Parallel operation of permanent magnet synchronous generator based windmills connected to HVDC-VSC link

Development and implementation of a control scheme for wind farms based on Permanent Magnet Synchronous Generators (PMSGs) connected to a single HVDC-VSC converter is the main objective of this paper. The presented scheme is based on computing the optimal frequency at which the power converter must work to extract the maximum power from parallel operated PMSG based windmills. The power extraction from wind turbines connected to PMSGs and its control, grid-side converter control which is connected to AC grid are discussed in detail. The control scheme is validated by means of case studies using PSCAD/EMTDC simulation software on a wind farm consisting of two wind turbines.