| 引用本文: | 李峰,孟少飞.局部阴影条件下的光伏阵列插空列循环静态重构方法[J].电力自动化设备,2021,41(8): |
| LI Feng,MENG Shaofei.ICL static reconstruction method of photovoltaic array under partial shadow condition[J].Electric Power Automation Equipment,2021,41(8): |
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| 摘要: |
| 对于光伏发电系统，局部阴影会导致光伏组件失配和热斑效应形成，采用重构方法可以降低局部阴影影响，减小损耗，提高输出功率。针对网状(TCT)结构光伏阵列，提出一种插空列循环(ICL)静态重构方法。在典型局部阴影类型和奇偶阵列类型情况下，给出了传统TCT结构和3种静态重构方法优化后的阴影分布图，计算了对应的阵列行电流。在MATLAB/Simulink软件中搭建了TCT结构光伏阵列模型，对所提方法和现有静态重构方法进行仿真和对比分析。结果表明，采用所提方法可使受遮蔽光伏组件在整个阵列中的分布更加均衡，有效提高光伏阵列平均输出功率，明显减少输出特性曲线上的峰值个数。所提方法还具有原理简单、易于实现、成本较低等优势，可为光伏电厂建设时阵列结构和重构方法的选择提供参考。 |
| 关键词: 光伏阵列 局部阴影 插空列循环 静态重构 TCT结构 |
| DOI：10.16081/j.epae.202107016 |
| 分类号:TM615 |
| 基金项目:宁夏回族自治区重点研发计划项目(2020BDE03003) |
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| ICL static reconstruction method of photovoltaic array under partial shadow condition |
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LI Feng1,2, MENG Shaofei1
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1.School of Physics and Electrical and Electronic Engineering, Ningxia University, Yinchuan 750021, China;2.Ningxia Key Lab of Intelligent Sensing for Desert Information, Yinchuan 750021, China
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| Abstract: |
| For photovoltaic power generation system, partial shadow leads to mismatch of photovoltaic modules and formation of hot spot effect. Using reconstruction method can reduce the impact of partial shadow and the losses, and increase the output power. For the TCT(Total Cross Tied) structure photovoltaic array, an ICL(Interpolation & Column Loop) static reconstruction method is proposed. In the case of typical partial shadow types and odd-even array types, the shadow distribution diagram of the traditional TCT structure and the optimized diagrams with three static reconstruction methods are given, and the corresponding array row currents are calculated. A TCT structure photovoltaic array model is built in MATLAB/Simulink software, and the proposed method and the existing reconstruction methods are simulated and compared. The results show that, the proposed method can make the distribution of shaded photovoltaic modules in the entire array more balanced, which effectively increases the average output power of photovoltaic array, and significantly reduces the number of peaks on the output characteristic curve. The proposed method also has the advantages of simple principle, easy implementation and low cost, which can provide reference for the selection of array structure and reconstruction method during the construction of photovoltaic power plants. |
| Key words: photovoltaic arrays partial shadow ICL static reconstruction TCT structure |
