The configuration of a fixed-speed wind turbine is based on a gearbox and an asynchronous generator, which is usually a squirrel-cage induction generator to reduce costs. The gearbox links the wind turbine shaft with the rotor of a fixed-speed generator, providing the high rotational speed required by the generator. The generator produces electricity through a direct grid connection, and a set of capacitors is used to compensate reactive power. Due to lack of a frequency converter, the generator speed is dictated by the grid frequency. One disadvantage of fixed-speed operation is poor aerodynamic efficiency, particularly at partial-load operation. From the electrical system’s standpoint, another disadvantage is that this type of operation has a detrimental effect on voltage because asynchronous generators demand reactive power from the grid.