一种小型并网风力发电系统及其控制策略

Novel Small-scaled Wind Generation System with Corresponding Control Strategy

提出并分析了一种小型并网风力发电系统,该系统采用了新的电路拓扑结构,并在传统的小型并网型风电系统的基础上引入一条储能支路,使得系统可以收集微弱的风能,以提高风能利用率。该系统采用了一种基于电池荷电状态的控制策略,根据电池在不同荷电状态下的不同工况将控制策略分为多个模态,同时可以有效地根据不同风速调整系统的工作模态,因此具有延长电池使用寿命与针对小型风场的适应性。最后实验结果表明了所述小型风力发电系统的有效性以及理论分析的可靠性。

A small-scaled grid-tie wind generation system(SGWGS)was proposed and analyzed. Novel circuit topologies were employed,and based on the traditional SGWGS,an additional branch for energy storage was introduced into. As a result,weak wind energy could be collected,and the utilization rate of wind power was promoted. The system also adopted a novel control strategy based on the state-of-charge(SOC)of the battery. This control strategy could be divided into several modes according to different working conditions of different SOC andhad the ability to adjust operating mode for the system to adapt to variable wind speed efficiently. Thus the system wasable to harvest the prolonged lifetime for the battery and high flexibility towards small-scaled wind farm. At last,experiments were conducted to verify the availability of the proposed SGWGS with its control strategy and the reliability of the theoretical analysis.