针对早期热斑（功率损失小于25%）光伏组件,分析遮挡、晶体缺陷和隐裂型热斑故障的演化机理,建立组件等效电路模型,利用检测获得的I-V特性数据,通过计算不同类型热斑的I-V特性曲线关键特征量（短路电流处斜率/开路电压处斜率、转折点处电流）和模型参数（光生电流、串联电阻和并联电阻）,研究其对I-V特性的影响作用,分析获得各类热斑的模型参数变化之间的差异性规律,并针对隐裂向隐裂型热斑演化过程中的参数变化进行分析。研究结果表明：不同类型热斑故障的I-V特性关键特征量,以及模型参数,其变化规律具有较为明显的差异性,可初步实现3种热斑类型,以及隐裂和隐裂型热斑的区分判定。
Abstract
For photovoltaic modules with early hot spots （power loss less than 25%）, analyze the evolution mechanisms of occlusions, crystal defects and hidden crack type hot spot faults, establish the equivalent circuit model of the module, and utilize the I-V characteristic data obtained through detection. By calculating the key characteristic quantities （slope at short-circuit current/slope at open-circuit voltage, current at turning point） and model parameters （photogenerated current, series resistance and parallel resistance） of the I-V characteristic curves of different types of hot spots, the influence on the I-V characteristics are studied, and the difference laws among the changes of model parameters of various types of hot spots are analyzed and obtained. And the parameter changes during the evolution process from latent cracking to latent cracking type hot spots are analyzed. The research results show that the key characteristic quantities of I-V characteristics and model parameters of different types of hot spot faults have relatively obvious differences in their variation patterns, which can initially achieve the distinction and determination of three types of hot spots, as well as hidden cracks and hidden crack-type hot spots.
关键词
光伏组件 /
I-V特性 /
特征提取 /
参数计算 /
热斑故障
Key words
PV modules /
current voltage characteristics /
feature extraction /
parameter calculation /
hot spot faults
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参考文献
[1] Khodapanah M, Ghanbari T, Moshksar E, et al.Partial shading detection and hotspot prediction in photovoltaic systems based on numerical differentiation and integration of the P-V curves[J]. IET Renewable Power Generation, 2023, 17(2): 279-295.
[2] Simon M, Meyer E L.Detection and analysis of hot-spot formation in solar cells[J]. Solar Energy Materials and Solar Cells, 2010, 94(2): 106-113.
[3] Goudelis G, Lazaridis P I, Dhimish M.A review of models for photovoltaic crack and hotspot prediction[J]. Energies, 2022, 15(12): 4303.
[4] Hong Y, Zhu M, Sun K W, et al.Research on temperature anomalies caused by the shading of individual solar cells in photovoltaic modules[J]. Solar Energy, 2024, 269: 112343.
[5] Wang A, Xuan Y M.Close examination of localized hot spots within photovoltaic modules[J]. Energy Conversion and Management, 2021, 234: 113959.
[6] 刘恒, 马铭遥, 张志祥, 等. 热斑晶硅光伏组件I-V曲线分析及特征模拟研究[J]. 太阳能学报, 2021, 42(4): 239-246.
Liu H, Ma M Y, Zhang Z X, et al.Study on I-V curve analysis and characteristic simulation of silicon photovoltaic module with hot spot[J]. Acta Energiae Solaris Sinica, 2021, 42(4): 239-246.
[7] Deng S F, Zhang Z, Ju C H, et al.Research on hot spot risk for high-efficiency solar module[J]. Energy Procedia, 2017, 130: 77-86.
[8] Savadogo M, Ouedraogo A, Soro B, et al.Analysis and comparison of doping level effects on a crystalline silicon PV cell under both moderate light concentration and normal illumination modes[J]. Energy and Power Engineering, 2022, 14(10): 523-540.
[9] Reis I E, Riepe S, Koch W, et al.Effect of impurities on solar cell parameters in intentionally contaminated multicrystalline silicon[C]. 24th European Photovoltaic Solar Energy Conference, Hamburg, 2009.
[10] Wang A, Xuan Y M.Multiscale prediction of localized hot-spot phenomena in solar cells[J]. Renewable Energy, 2020, 146: 1292-1300.
[11] Dhimish M, Lazaridis P I.An empirical investigation on the correlation between solar cell cracks and hotspots[J]. Scientific Reports, 2021, 11: 23961.
[12] Mohammed Niyaz H, Meena R, Gupta R.Impact of cracks on crystalline silicon photovoltaic modules temperature distribution[J]. Solar Energy, 2021, 225: 148-161.
[13] Dhimish M, Hu Y H.Rapid testing on the effect of cracks on solar cells output power performance and thermal operation[J]. Scientific Reports, 2022, 12: 12168.
[14] Dhimish M.Micro cracks distribution and power degradation of polycrystalline solar cells wafer: Observations constructed from the analysis of 4000 samples[J]. Renewable Energy, 2020, 145: 466-477.
[15] 方洛迪, 郭倩, 卫东, 等. 遮挡状态下光伏组件多峰输出特性的参数计算与分析[J]. 太阳能学报, 2022, 43(7): 115-121.
Fang L D, Guo Q, Wei D, et al.Parameters calculation and analysis of muti-peak output characteristics of PV module under shading[J]. Acta Energiae Solaris Sinica, 2022, 43(7): 115-121.
[16] Wang Y D, Itako K, Kudoh T, et al.Voltage-based hot-spot detection method for photovoltaic string using a projector[J]. Energies, 2017, 10(2): 230.
基金
浙江省基础公益研究计划（LGG22E070003; LGG20E070003）
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