Analysis for double-fed AC-excited variable-speed constant-frequency wind power generation system

This paper presents the principle for variable speed constant frequency AC exited wind power system. In the coordinate commutation technology, the AC excited generator´s mathematical mode has established under three-phase static coordinate system, thus was carried on the analysis to it that in the independent movement´s time situation, built system´s simulation module in MATLAB simulation software, and the system was carried on simulation at independent movement, simulation result indicated that the modelling is accuracy, as well as in the wind-power system used variable-speed constant-frequency technology can enhanced the wind energy usage greatly. Improved electrical power system´s stability, and the rotor speed also can changed, enables it has the ability of independent idle work adjustment.