Doubly-fed wind power generation system based on direct power control and its low voltage ride-through source code

For the currently widely used doubly-fed wind power generation system, this report proposes a stator-side direct power control algorithm based on a multi-frequency point proportional integral resonant controller. Compared with the traditional control method, it simplifies the control structure and provides Under symmetrical grid conditions, 75% of controller resources can be saved. At the same time, the single-loop design enables the system to have good response speed. Combined with the active crowbar circuit and flux stabilization algorithm, the system uses a unified approach to achieve its symmetrical and asymmetrical low voltage ride-through, meeting the relevant standards of the State Grid's wind power system. A set of 7.5kw doubly-fed wind power generation laboratory system including the host computer system was independently established to verify the effectiveness of the control algorithm. Some research results have been promoted and applied in actual industrial situations, and the 2MW product-level wind power system is in the testing stage.