Analysis of wind power data for optimising DFIGs

This paper evaluates various wind power estimation models to represent the wind energy for machine design and control purposes. Traditionally, linear, quadratic and cubic formulas have been used for interpolating wind power curves but have their limitations. Due to the fluctuating nature of wind power, they may not be accurate to model the actual wind speed profile and nor convenient for wind turbine generator design and control which demands a representative site-specific wind speed profile. On the basis of the DFIG equivalent circuit, loss components and maximum efficiency of DFIGs are derived and these are taken into account when optimising DFIGs to match the specific site of development.