  This paper describes variable speed wind turbine (Types 3 and 4, IEC
61400-27-1) simulations based on an open-source solution to be applied to
Bachelor and Master Degrees. It is an attempt to improve the education quality
of such sustainable energy by giving an open-source experimental environment
for both undergraduate and graduate students. Indeed, among the renewable
sources, wind energy is currently becoming essential in most power systems. The
simulations include both one-mass and two-mass mechanical models, as well as
pitch angle control. A general overview of the structure, control, and
operation of the variable speed wind turbine is provided by these easy-to-use
interactive virtual experiments. In addition, a comparison between commercial
and open-source software packages is described and discussed in detail.
Examples and extensive results are also included in the paper. The models are
available in Scilab-Xcos file exchange for power system education and
researcher communities.
