A shade dispersion interconnection scheme for partially shaded modules in a solar PV array network
A shade dispersion interconnection scheme for partially shaded modules in a solar PV array network
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太阳能光伏阵列网络中部分遮蔽模块的遮光分散互连方案
DOI：
10.1016/j.energy.2017.07.161
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
S. Jena
中科院分区：
文献类型：
--
作者：
P. Satpathy;Renu Sharma;S. Jena
太阳能光伏（SPV）阵列是由许多模块相互连接的网络，以提供所需的终端电压和电流。在现场条件下，大型光伏阵列提供的功率低于阵列额定功率。本文研究了模块化互联方案对光伏阵列可用功率变化的敏感性。该方法涉及计算机算法的开发，该算法需要发展新的连接方案，以在所有遮阳条件下最大化功率。综合多个阴影的最小功率损耗对应的连接方案，形成一种创新的连接方案。该连接方案被认为是最优连接方案。利用原型现场试验，对3 × 3尺寸的小型SPV阵列和7 × 7尺寸的相对较大的SPV阵列进行了各种可能的遮光模式的评估。与早期的互联方案相比，其发电的优点得到了强调。结果表明，该连接方案在性能和冗余度方面优于目前已知的最佳连接方案。该方案可以很方便地应用于子阵列，而子阵列又可以合成更大的SPV阵列。
Solar Photovoltaic (SPV) arrays are networks of many modules interconnected to provide required terminal voltage and current. In field conditions, large PV arrays deliver lower power than array rating. In this paper, sensitivity of modular interconnection schemes in variation of available power from PV array is investigated. The approach involves the development of a computer algorithm that is required to evolve the new connection scheme to maximize power under all shading conditions. Connection schemes corresponding to minimum power loss for several shadows which are synthetized and an innovative connection scheme is evolved. This connection scheme is considered as the optimal connection scheme. The emerged connection scheme is evaluated for a small SPV array of size 3 × 3 and a comparatively large SPV array of size 7 × 7 using a prototype field experiment for various possible shading patterns. The merit of its energy generation compared to earlier interconnection schemes is highlighted. It is found that the proposed connection scheme excels in performance and redundancy over the hitherto known best interconnection schemes. The scheme may be very conveniently applied to subarrays which in turn can be synthesized for larger SPV arrays.