Study On Wind Generator Synchronized Pitch Control

With the rapid development of modern economic, the increasing consumption of traditional energy sources such as oil and coal year by year, the traditional energy resources are near a exhausted station, therefore, to search some clean, renewable, pollution-free resources is urgent. At present, a large number of clean energy technologies were developed, it is show that wind energy exploiting technology has a clean, pollution-free and reusable, and other advantages, it occupies a prominent position in renewable clean energy development process, in the current context of promotion of sustainable energy, wind is of great value, it can bring great economic and social benefits, the world attach to great importance.With the wind generating capacity continues to increase, a single large fan blades have weighed to several tons, for so much inertia, if using the unified pitch control to keep up with the speed of change is very difficult to respond, above the above factors, the paper put forward the independent pitch control theory. Variable-pitch system as one of the core parts of the large wind turbine control system, it has a very important role for the safety, stability, and efficient operation of wind power generation unit.The paper aim at the variable paddle control system of double feed wind generator to established a track mathematics model of variable paddle control system, raise the sliding mode control theory based on nature random wind speed, to control the pitch angle according to feedback of pitch location; Besides, the paper also designed a controller combine with coordination control mechanism, it makes every paddle controller can adjust itself according to others. The controller makes pitch angles keep consistent in whole variable paddle process, achieve the purpose of synchronous pitch. It is much effective to improve control performance of pitch system.