TY - JOUR
T1 - An Explicit Subcell-Based Photovoltaic Model and Its Application in Fault Diagnosis Under Partial Shading Conditions
AU - Chen, Xinyi
AU - Shen, Yu
AU - Kerekes, Tamas
AU - Wang, Yiye
AU - Zhang, Kanjian
AU - Wei, Haikun
PY - 2023/11/1
Y1 - 2023/11/1
N2 - Photovoltaic (PV) models under partial shading conditions are typically based on the scenario that one whole module or cell is shaded under uniform low irradiance. Nonuniform partial shading on one cell is seldom discussed. However, partial shading in real life is not usually in homogeneous irradiance. To fully examine the PV behavior under partial shading conditions, a cell has to be divided into several subcells to model nonuniform complex shading patterns. Therefore, this article develops a comprehensive mathematical PV model based on a single-diode model covering shading area, shading transmittance, and avalanche breakdown effect on reverse-biased cells. It simulates the output of subcells, cells, submodules, and modules by the calculation of explicit Lambert W function. The proposed model is validated in experimental tests, and its average relative error is under 5%. Compared with other related studies, the proposed model has a decent tradeoff between computation time and model accuracy. The characteristics of the I - V curves based on the proposed model and measured data reveal almost the same information about shading patterns. It demonstrates to be a valuable tool in the application of fault diagnosis.
AB - Photovoltaic (PV) models under partial shading conditions are typically based on the scenario that one whole module or cell is shaded under uniform low irradiance. Nonuniform partial shading on one cell is seldom discussed. However, partial shading in real life is not usually in homogeneous irradiance. To fully examine the PV behavior under partial shading conditions, a cell has to be divided into several subcells to model nonuniform complex shading patterns. Therefore, this article develops a comprehensive mathematical PV model based on a single-diode model covering shading area, shading transmittance, and avalanche breakdown effect on reverse-biased cells. It simulates the output of subcells, cells, submodules, and modules by the calculation of explicit Lambert W function. The proposed model is validated in experimental tests, and its average relative error is under 5%. Compared with other related studies, the proposed model has a decent tradeoff between computation time and model accuracy. The characteristics of the I - V curves based on the proposed model and measured data reveal almost the same information about shading patterns. It demonstrates to be a valuable tool in the application of fault diagnosis.
KW - Avalanche breakdown
KW - Integrated circuit modeling
KW - Mathematical models
KW - Numerical models
KW - Pattern analysis
KW - Photovoltaic systems
KW - Resistance
KW - Schottky diodes
KW - Shadow mapping
KW - Partial shading
KW - shading patterns
KW - photovoltaic (PV) system
UR - http://www.scopus.com/inward/record.url?scp=85174820339&partnerID=8YFLogxK
U2 - 10.1109/JPHOTOV.2023.3318833
DO - 10.1109/JPHOTOV.2023.3318833
M3 - Journal article
SN - 2156-3403
VL - 13
SP - 905
EP - 916
JO - IEEE Journal of Photovoltaics
JF - IEEE Journal of Photovoltaics
IS - 6
M1 - 10271549
ER -