Optimal Hybrid PV Array Topologies to Maximize the Power Output by Reducing the Effect of Non-Uniform Operating Conditions
Optimal Hybrid PV Array Topologies to Maximize the Power Output by Reducing the Effect of Non-Uniform Operating Conditions
复制标题
最佳混合光伏阵列拓扑通过减少不均匀运行条件的影响来最大化功率输出
DOI：
10.3390/electronics10233014
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发表时间：
2021
期刊：
影响因子：
2.9
通讯作者：
T. Senjyu
中科院分区：
文献类型：
--
作者：
Suneel Raju Pendem;Suresh Mikkili;S. Rangarajan;Sudhakar Avv;Randolph E. Collins;T. Senjyu
光伏（PV）系统中心逆变器架构包括各种常规阵列拓扑，诸如简单串联（S-S）、并联（P）、串并联（S-P）、全交叉连接（T-C-T）、桥接（B-L）和蜂窝（H-C）。非均匀工作条件（NUOC）下的传统光伏阵列拓扑结构会产生更高的不匹配功率损耗，并且在输出特性中代表多个最大功率点（M-P-Ps）。T-C-T拓扑在NUOC下的性能优于传统拓扑上级。然而，T-C-T拓扑结构的主要限制是较高的冗余度、较多数量的电连接、较高的布线损耗、在逐行遮蔽模式期间的较差性能以及用于PV模块的重新配置的较多数量的开关和传感器。本文提出了各种最佳的混合光伏阵列拓扑结构，以克服传统的T-C-T阵列拓扑结构的局限性。所提出的混合拓扑结构包括串并联交叉连接（S-P-C-T）、桥链接交叉连接（B-L-C-T）、蜂窝交叉连接（H-C-C-T）、串并联总交叉连接（S-P-T-C-T）、桥链接总交叉连接（B-L-T-C-T）、蜂窝总交叉连接（H-C-T-C-T）和桥链接蜂窝（B-L-H-C）。提出的混合拓扑的性能进行了评估，并与传统的拓扑结构在不同的NUOC。用于比较研究的参数是开路电压、短路电流、全局最大功率点（GMPP）、局部最大功率点（LMPP）、LMPP的数量和填充因子（FF）。此外，还确定了传统和混合阵列拓扑的失配功率损耗和转换效率。基于结果，它被发现的混合阵列拓扑结构最大化的功率输出，通过减轻NUOC的影响，并减少LMPP的数量。
The photovoltaic (PV) system center inverter architecture comprises various conventional array topologies such as simple-series (S-S), parallel (P), series-parallel (S-P), total-cross-tied (T-C-T), bridge-linked (B-L), and honey-comb (H-C). The conventional PV array topologies under non-uniform operating conditions (NUOCs) produce a higher amount of mismatching power loss and represent multiple maximum-power-points (M-P-Ps) in the output characteristics. The performance of T-C-T topology is found superior among the conventional topologies under NUOCs. However, T-C-T topology’s main limitations are higher redundancy, more number of electrical connections, higher cabling loss, poor performance during row-wise shading patterns, and more number of switches and sensors for the re-configuration of PV modules. This paper proposes the various optimal hybrid PV array topologies to overcome the limitations of conventional T-C-T array topology. The proposed hybrid topologies are such as series-parallel-cross-tied (S-P-C-T), bridge-link-cross-tied (B-L-C-T), honey-comb-cross-tied (H-C-C-T), series-parallel-total-cross-tied (S-P-T-C-T), bridge-link-total-cross-tied (B-L-T-C-T), honey-comb-total-cross-tied (H-C-T-C-T), and bridge-link-honey-comb (B-L-H-C). The proposed hybrid topologies performance is evaluated and compared with the conventional topologies under various NUOCs. The parameters used for the comparative study are open-circuit voltage, short-circuit current, global-maximum-power-point (GMPP), local-maximum-power-point (LMPP), number of LMPPs, and fill factor (FF). Furthermore, the mismatched power loss and the conversion efficiency of conventional and hybrid array topologies are also determined. Based on the results, it is found that the hybrid array topologies maximize the power output by mitigating the effect of NUOCs and reducing the number of LMPPs.