陈晓龙;杨志颖;李永丽;李斌;李博通;

• 1:天津大学电气自动化与信息工程学院

摘要(Abstract)：

提出了一种基于最大功率跟踪策略(maximum power point tracking,MPPT)施加梯形电压扰动的、适用于含有多个光伏发电系统的直流微电网孤岛检测方法,该方法通过检测并网点电压的变化特性是否符合孤岛情况下的理论分析结果来识别孤岛。首先,根据局部区域微电网内不同光伏阵列(photovoltaic array,PVA)所受光照强度和温度均相同的特点,推导了不同PVA输出电流之间的关系,进而提出了基于环境系数的扰动同步性策略。然后,提出了PVA在端口电压恒定以及变化时分别对应的静态等值电路以及动态等值电路,能够准确反映PVA在不同电压扰动时段的功率变化特性。最后,提出了基于梯形电压扰动的孤岛检测方法,深入挖掘了梯形电压扰动蕴含的冗余判据,提高了孤岛检测的准确性,并利用PSCAD/EMTDC仿真软件验证了所提方法的有效性。

关键词(KeyWords)： 孤岛检测;光伏阵列;直流微电网;电压扰动

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金青年基金资助项目(51707131)~~

作者(Author): 陈晓龙;杨志颖;李永丽;李斌;李博通;

Email:

DOI: 10.13335/j.1000-3673.pst.2020.0741

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