ABSTRACT
Most wind turbines are connected to the electric power grid. Wind turbines are not only a new kind of power plant that transform wind energy into electricity, they also have other traits that power companies, utilities and grid operators are not used to. Wind speed is constantly changing, in a way that is hard to predict, and so the power production will vary. Wind turbines are comparatively small and are usually connected to the distribution grid, while large conventional power plants are connected to the transmission grid, with much higher voltage levels.
