刘鑫蕊;高超;王智良;

• 1:东北大学信息科学与工程学院

摘要(Abstract)：

光伏并网发电系统中,当光伏板输出功率突变时,直流侧母线电压波动幅度较大,若控制不当,将直接影响系统的正常工作。为提高母线电压的控制性能,提出一种基于非线性扰动观测器的直接功率控制方法。该方法无需增加额外的传感器,利用扰动观测器,对光伏板输出功率进行实时观测,并将其作为前馈量加入到功率内环,使功率内环给定含有输入功率信息。针对功率内环,重新定义了控制输入量,省去了同步旋转坐标变换环节。详细介绍了观测器及功率内环的设计过程,并给出内外环参数整定方法。最后通过仿真验证了所提方法的正确性和有效性。

关键词(KeyWords)： 光伏并网逆变器;直流侧母线电压;非线性扰动观测器;直接功率控制;前馈;双闭环

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(61573094,61703289)~~

作者(Author): 刘鑫蕊;高超;王智良;

Email:

DOI: 10.13335/j.1000-3673.pst.2019.0223

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