Research on the optimal control method of wind and electric energy conversion

The author first analyses the energy conversion of wind power generation and the main factor of influencing output power from the perspective of energy conversion and equilibrium. With the method of coordinate transformation, the output power is decomposed into active component and reactive component. Then based on the ideas of optimal control of wind and electric energy conversion, the relation expression of revolving speed and maximum output power was deducted. According to the voltage balance equation, the calculation relationship was given which can be used to predict the rotational speed of fan from the measurable direct voltage. Lastly adopting the observing method of speed senseless, an optimal control system of wind and electric energy conversion is established. The system can successfully realize the prediction and adjustment and control of revolving speed. The experimental simulation proves that the control strategy put forward is simple and effective and it also has the characteristics of high output conversion efficiency and good dynamic performance.