摘要
光伏阵受到遮挡形成局部阴影,对发电输出功率产生影响,使其P-V输出特性曲线呈现多峰特点。这会导致用常规最大功率点跟踪(MPPT)方法无法精确寻找到系统最大功率点(MPP)的情况发生。针对该情况,利用局部阴影下光伏阵列最大功率点与电压的关系,提出一种新型多峰全局最大功率点跟踪算法。经测试,在不增加额外补偿阵列的情况下,该算法能够快速准确地跟踪到系统最大功率点,缓解因局部遮阴带来的热斑效应,提高光电转换效率,可使输出功率增加11.27%。
The photovoltaic arrays are shaded locally. This affects the output power of power generation. Its P-V output characteristic curve exhibits multi-peak characteristics. It is difficult to accurately track the global maximum power point(MPP) using the conventional maximum power point tracking(MPPT)method. A new multi-peak global maximum power point tracking algorithm is proposed by making full use of the relationship between the maximum power point and voltage of the PV array under local shadow. Through test, the global maximum power point of the system can be quickly and accurately tracked without additional compensation array. The hot spot effect caused by local shading is effectively alleviated. The photoelectric conversion efficiency is improved, and the output power is increased by 11.27%.
作者
赵俊霞
吴启琴
张乐
沈克强
ZHAO Jun-xia;WU Qi-qin;ZHANG Le;SHEN Ke-qiang(School of Electronics and Information Technology,Sanjiang University,Nanjing Jiangsu 210012,China;School of Electronic Science&Engineering,Southeast University,Nanjing Jiangsu 210096,China)
出处
《电源技术》
CAS
北大核心
2019年第9期1528-1530,1562,共4页
Chinese Journal of Power Sources
基金
国家自然科学基金项目(61674097)
江苏高校品牌专业建设工程资助项目(PPZY2015A033)
关键词
光伏阵列遮挡
局部多峰最大功率点
全局最大功率点
MPPT算法
photovoltaic array occlusion
the maximum power point of local multi peak
the global maximum power point
maximum power point tracking (MPPT) algorithm
