CALCULATION AND VALIDATION OF PHOTOVOLTAIC STRING MULTI-PEAK PARAMETERS BASED ON MULTI-PEAK SEPARATION

Shen Minxiang; Guo Qian; Wei Dong; Lu Ting

doi:10.19912/j.0254-0096.tynxb.2023-1752

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (3) : 320-327. DOI: 10.19912/j.0254-0096.tynxb.2023-1752

CALCULATION AND VALIDATION OF PHOTOVOLTAIC STRING MULTI-PEAK PARAMETERS BASED ON MULTI-PEAK SEPARATION

Shen Minxiang¹, Guo Qian¹, Wei Dong², Lu Ting¹

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Abstract

Based on the forward/reverse output characteristic model of solar cells, the influence of fault modules on the I-V output characteristic curve of photovoltaic string is studied, and a multi peak output characteristic model of photovoltaic string is established. Based on the superposition characteristics of photovoltaic string output voltage, a multi peak separation method for string is obtained, and a parameter calculation method for photovoltaic string model with multi peak output characteristic curves is proposed. Starting from the first peak of the multi peak output characteristic curve, the improved particle swarm optimization algorithm is used to calculate the unit model parameters corresponding to the current peak. Then, through the multi peak separation method, combined with the calculated first peak to all model parameters corresponding to the current peak, the single peak curve is separated from the next peak, and the corresponding model parameters are calculated. The multi peak separation and single peak parameter calculation alternate until the tail peak, and all model parameter calculations are completed. The experimental results show that the established multi peak output characteristic model of photovoltaic string can reliably simulate the output characteristics of photovoltaic string under different faults; The proposed multi peak separation based photovoltaic string multi peak parameter calculation method can accurately calculate the photovoltaic string model parameters under different faults.

Key words

solar cells / parameter extraction / particle swarm optimization / multi-peak separation / photovoltaic string

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Shen Minxiang, Guo Qian, Wei Dong, Lu Ting. CALCULATION AND VALIDATION OF PHOTOVOLTAIC STRING MULTI-PEAK PARAMETERS BASED ON MULTI-PEAK SEPARATION[J]. Acta Energiae Solaris Sinica. 2025, 46(3): 320-327 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1752

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