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Has a very important significance in today's increasingly tense conventional energy, the increasingly serious environmental pollution, development and utilization of the resource-rich and non-polluting wind energy resources, To this end, the world competing for the development of wind power industry, wind power technology has been an unprecedented development, the emergence of a variety of wind turbine type, in which the variable speed constant frequency unit to become the mainstream model of wind power. Than constant speed constant frequency unit, VSCF unit do variable motion allows the wind wheel, wind energy utilization factor, to achieve the purpose of better use of wind. Is widely used in large-capacity and grid-connected wind power generation system, wind power system is an important direction for future development. First, based on extensive analysis of relevant data, key research VSCF wind turbine control strategy. The composition of the wind turbine control system to complete the function, introduced the basic theory of wind power. At different stages for the operation of the wind turbine, the use of different control strategies, modeling and simulation study of the overall system using the GH Bladed wind power simulation software. Secondly, taking into account the variable speed constant frequency wind turbine special circumstances and requirements, drawing on the existing thermal power, hydropower, wind power and other related technologies, wind power synchronous brushless excitation system, high-speed synchronous rotary brushless excitation full power inverter \And the crew from theory to practice, in-depth study of the system simulation experimental platform for research into wind power construction. The subject is also an important part of the Changxing Wind Power Technology Co., Ltd. \Their computer model, wind power experiment system platform, the actual operation of the fan three realization detailed way, the wind turbine has been put into use in Tongliao, Inner Mongolia Wind Farm, and run well, further evidence of the program is feasible , practicality and superiority. In addition, with the increasing installed capacity of wind turbines, wind power generation system on the grid growing problem of low voltage ride through a universal concern. In this paper, VSCF wind power system mainstream units - double-fed and full-power converter type is characterized by its actual operation in low voltage crossing analysis, to increase the protection circuit, enhanced low voltage ride through capacity. Its failure not only able to keep the grid smooth and have good low voltage ride through capability.
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