基于变步长扰动观测法的风能并网系统MPPT算法研究

Study on MPPT Algorithm for a Direct-Drive Wind Power System Based on Variable Step Observation

建立了包含风机、永磁同步发电机、双boost电路以及逆变电路的整个直驱式风力发电系统的仿真模型。基于风力机的运行特性,提出了一种MPPT算法,该算法以双boost电路的输入电压为控制变量。在MATLAB7.6的simulink平台下进行了仿真,仿真结果表明了该算法的正确性,样机实验也证实了该控制策略的有效性。

An overall dynamic model for direct drive wind power system, including wind-turbine, permanent magnet （PM） synchronous generator, double boost circuit and inverter is established. Based on the introduction of wind turbine operation characteristics, the maximum power extraction control method using the input voltage of double Boost circuit as the control variable was put forward. The simulink results and experiment under MATLAB7.6 testify the validity of the theory and the control strategy.