Lpv Theory In The Small Wind Power Systems

As one of the most important green power energies all over the world,wind power has become the hot spot.Nowadays,most researches are about giant wind generator which are connected to the power grid,while in remote areas which are out of power grid range,stand-alone wind power system has done great contribution to modernization of these regions.The LPV method used in stand-alone wind power system was studied in this paper. The main work is as follows.Firstly,we can know about the whole control system through analyzing the character the LPV method.Secondly,a kind of polytypic LPV rotor current estimator is designed,and the stator flux and torque are calculated according to the measured value of rotor current and stator current.Thirdly,on the base of traditional generator model,we deduced a new state equation which has an uncertain parameter.With the varying of uncertain parameter,our system is also varying.Finally,the simulation of Matlab shows that the squirrel-cage inductor generator can output a smooth voltage when the wind is fluctuate,so that the whole wind power system has a high robust.In the last,some study ways of LPV method are put forward.