High-accuracy maximum power point estimation for photovoltaic arrays

Wang, Jen-Cheng; Su, Yu‐Sheng; Shieh, Jiann-Cherng; Jiang, Joe‐Air

doi:10.1016/j.solmat.2010.10.032

Cited by 72 publications

(40 citation statements)

References 31 publications

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“…All of the aforementioned phenomena are opposite to the voltage ones (Figure ). These experimental results verify that the current at the MPP of the thin film PV module can also be accurately estimated using our previous theoretical method . Moreover, it is confirmed that there is a proportional relationship between the short‐circuit current I sc and the current I mp of the MPP, which is almost constant and equal to 0.93.…”

Section: Resultssupporting

confidence: 85%

“…After careful inspection of Figure , we find that the ratios of V mp / V oc remain almost constant, close to 0.78. Furthermore, from the values of V mp and V oc , we can also directly estimate the ratio of I mp and I sc at the MPPs of the thin film PV modules through the theoretical method . Figure also shows the irradiation intensity dependence of I mp / I sc ratio for the thin film PV modules.…”

Section: Resultsmentioning

confidence: 99%

“…The open‐circuit voltage V oc under standard test conditions can be obtained from the datasheet for the thin film PV modules. In practical applications, the voltage V mp of a thin film PV module operated at the MPP is near linearly proportional to the open‐circuit voltage V oc of a thin film PV module operated under different environmental conditions, that is, varying irradiation intensities and temperatures . In order to directly estimate the MPP of thin film PV modules, the voltage V mp at the MPP can be expressed as proportional to the open‐circuit voltage V oc :

V_{mp} = m V_{oc}

where m is defined as the ratio of V mp to V oc .…”

Section: Theoretical Basis Of the Proposed Methodsmentioning

confidence: 99%

See 2 more Smart Citations

A novel analytical model for determining the maximum power point of thin film photovoltaic module

Jiang

Liang

Wang

et al. 2012

Progress in Photovoltaics

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Achieving the maximum power output from photovoltaic (PV) modules is indispensable for the operation of grid‐connected PV power systems under varied atmospheric conditions. In recent years, the study of PV energy for different applications has attracted more and more attention because solar energy is clean and renewable. We propose an efficient direct‐prediction method to enhance the utilization efficiency of thin film PV modules by tackling the problem of tracking time and overcoming the difficulty of calculation. The proposed method is based on the p–n junction recombination mechanism and can be applied to all kinds of PV modules. Its performance is not influenced by weather conditions such as illumination or temperature. The experimental results show that the proposed method provides high‐accuracy estimation of the maximum power point (MPP) for thin film PV modules with an average error of 1.68% and 1.65% under various irradiation intensities and temperatures, respectively. The experimental results confirm that the proposed method can simply and accurately estimate the MPP for thin film PV modules under various irradiation intensities and temperatures. In future, the proposed method will be used to shed light on the optimization of the MPP tracking control model in PV systems. Copyright © 2012 John Wiley & Sons, Ltd.

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Section: Resultssupporting

confidence: 85%

Section: Resultsmentioning

confidence: 99%

V_{mp} = m V_{oc}

where m is defined as the ratio of V mp to V oc .…”

Section: Theoretical Basis Of the Proposed Methodsmentioning

confidence: 99%

See 1 more Smart Citation

A novel analytical model for determining the maximum power point of thin film photovoltaic module

Jiang

Liang

Wang

et al. 2012

Progress in Photovoltaics

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“…The parallel resistance R sh is relatively high, and it can generally be ignored, and the characteristic PV current I pv can be expressed as a function in terms of the voltage V pv . This is known as the Shockley equation given by

I_{italicpv} = I_{g} - I_{italicsat} \{exp [\frac{q ((), V_{pv} + I_{pv} R_{s})}{nkT}] - 1\},

where q , n , and k are the physical constants and I g , I sat , R s , and T are experimental parameters. Here, q is the electron charge (C), n is the ideality factor of the diode, and k is the Boltzmann's constant (eV‐K −1 ).…”

Section: Theoretical Basis Of the Proposed Methodsmentioning

confidence: 99%

“…Here, q is the electron charge (C), n is the ideality factor of the diode, and k is the Boltzmann's constant (eV‐K −1 ). The ideality factor ( n ) of the diode is usually set as ‘1’ when only the diffusion current dominates or approximately ‘2’ when the recombination current dominates . I g is the light‐generated photocurrent (A), I sat is the reverse saturation current (A), R s is the series resistance (ohm), and T is the ambient temperature (K).…”

Section: Theoretical Basis Of the Proposed Methodsmentioning

confidence: 99%

On evaluating the effects of the incident angle on the energy harvesting performance and MPP estimation of PV modules

Jiang

Wang

Kuo

et al. 2013

Int. J. Energy Res.

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SUMMARY The incident angle is a critical factor impacting the performance of fixed photovoltaic (PV) modules. Off‐normal incidence leads to significant changes in the current–voltage (I–V) characteristics and serious deterioration in the performance of fixed PV modules, resulting in difficulties in achieving optimal use of the available solar energy and retaining the maximum power output. To investigate this problem in depth, we develop a theoretical method based on the material properties and recombination mechanisms of the semiconductor, which can be used to directly evaluate the incident angle dependence of the energy harvesting performance and the maximum power point (MPP) estimation of PV modules composed of different materials from their I–V characteristic curves under irradiation. The proposed method is a simple approach with a low calculation burden. The performance of the proposed method is evaluated by examining the characteristics of the open‐circuit voltage, short‐circuit current, MPP, and the maximum output power of PV modules constructed of different semiconductor materials with respect to the various incident angles. The results are discussed in detail. The experimental results demonstrate that the proposed method could be used to optimize the performance of fixed PV modules and realize MPP control of PV systems during practical operation. Copyright © 2013 John Wiley & Sons, Ltd.

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A novel power benefit prediction approach for two-axis sun-tracking type photovoltaic systems based on semiconductor theory

Kuo

Wang

Chou

et al. 2012

Prog. Photovolt: Res. Appl.

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High-accuracy maximum power point estimation for photovoltaic arrays

Cited by 72 publications

References 31 publications

A novel analytical model for determining the maximum power point of thin film photovoltaic module

A novel analytical model for determining the maximum power point of thin film photovoltaic module

On evaluating the effects of the incident angle on the energy harvesting performance and MPP estimation of PV modules

A novel power benefit prediction approach for two-axis sun-tracking type photovoltaic systems based on semiconductor theory

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