A Novel Approach for Maximum Power Tracking From Curved Thin-Film Solar Photovoltaic Arrays Under Changing Environmental Conditions
A Novel Approach for Maximum Power Tracking From Curved Thin-Film Solar Photovoltaic Arrays Under Changing Environmental Conditions
复制标题
在不断变化的环境条件下跟踪弯曲薄膜太阳能光伏阵列最大功率的新方法
DOI：
--
复制
发表时间：
2014
影响因子：
4.4
通讯作者：
V. Agarwal
中科院分区：
文献类型：
--
作者：
Pooja Sharma;S. Duttagupta;V. Agarwal
介绍了一种用于曲面薄膜柔性光伏组件最大功率跟踪的新方法。弯曲FPV组件的功率-电压特性呈现多峰模式。所提出的方法包括建模的弯曲FPV模块和优化使用此模型的功率产量。考虑典型的曲线形状，其相当代表几种实际应用，例如建筑一体化PV（BIPV）、弯曲屋顶、帐篷、浮空器等。结合回归分析，对各种曲线角度的FPV模块进行了广泛的实验，得出了将FPV模块参数[Isc，VOC，和填充因子（FF）]以及环境因素和布局设计参数（曲线形状和角度）。基于这些模型，提出了一种新的“扫描窗口”技术（SWT），以最大限度地提高弯曲FPV组件的功率产量。由于用于弯曲FPV的FF是高度动态的，SWT被证明是高度有效的。太阳角度阈值（根据估计的太阳角度获得）确定是否期望单个或多个功率峰值特性以及是否使用常规扰动和观察方法或SWT。这导致快速准确地跟踪最大功率点。所提出的方法有利于优化布局设计的BIPV和独立的光伏系统。
A novel approach for maximum power tracking from curved thin-film flexible photovoltaic (FPV) modules is described. Power-voltage characteristics of curved FPV modules exhibit multiple-peak patterns. The proposed approach consists of modeling the curved FPV modules and optimizing the power yield using this model. A typical curve shape is considered, which is fairly representative of several actual applications such as building integrated PVs (BIPVs), curved roofs, tents, aerostats, etc. Extensive experimentation with FPV modules for various curve angles, in conjunction with regression analysis, has led to empirical models that relate FPV module parameters[Isc, VOC, and fill factor (FF)] with environmental factors and layout design parameters (curve shape and angle). Based on these models, a new “scanning window” technique (SWT) is proposed to maximize the power yield of curved FPV modules. As the FF for curved FPVs is highly dynamic, the SWT proves to be highly effective. A solar angle threshold (obtained in terms of estimated solar angle) determines whether to expect single or multiple power peak characteristics and whether to use the conventional perturb and observe method or the SWT. This results in fast and accurate tracking of maximum power point. The proposed approach facilitates optimum layout designs for BIPVs and stand-alone PV systems.