直驱式小型风力发电机MPPT控制

MPPT Control of Directly Driven Small Wind Turbine Generator System

以基于永磁同步发电机的直驱式小型风力发电机组为研究对象,为了在不使用机械传感器的情况下实现最大功率点跟踪(MPPT)控制,提高系统可靠性和降低控制成本,提出了一种利用发电机输出端电压有效值和功率之间的关系曲线进行MPPT控制方法。该方法的主要贡献为:1)不使用机械传感器也能获得很好的MPPT控制效果;2)通过对风力涡轮机和永磁同步发电机组成的系统进行建模,减小了理论分析和计算的难度。仿真实验验证了所提出方法的有效性。

Addressed the issues of control for directly driven small wind turbine generator system （WTGS） based on permanent magnet synchronous generators （PMSG）. In order to achieve maximum power point tracking （MPPT） with no mechanical sensors, improve the reliability of WTGS and reduce its cost, a method was proposed by using U-P curve to achieve MPPT. The contributions of the method were as follows, 1） a good MPPT control effect was obtained without sensors, 2） In order to reduce the difficulty of theoretical analysis and computation of the whole system, a WTGS model consisting of wind turbine and PMSG was presented. The efficiency of the proposed method is verified.