| Popis: |
For the permanent magnet synchronous wind generator, a control method based on losses minimization is proposed, in order to solve the problem of the maximum wind energy tracking control, which often neglects the generator losses caused by the deviation between the actual working point and the optimal power point, and leads to the output power loss. Then, considering the loss of generator, the small-signal method is used to establish the transfer functions of the main components, such as the wind turbine, transmission chains, permanent magnet synchronous generator and so on. The zeros and poles of the transfer functions and their related stability are analyzed. The PI controllers of the current loop and power loop are designed, and the calculation method of control parameters is given. The simulation results verify the effectiveness of the proposed method, and show that the maximum wind energy tracking mode based on the loss minimization control (LMC) can reduce the controllable losses of the generator. Finally, compared with the id=0 control and the maximum torque per ampere control (MTPA), the method improves the maximum power tracking performance and increases the power output. |
