Research on Output Characteristics of Different PV Array Structures with Partial Shadow

Yun, Zhonghua; Jiang, Jun

doi:10.1088/1755-1315/94/1/012107

Cited by 1 publication

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“…In [8], the author studied four different system configurations, the derivation for the explicit expression of mean time to system failure, steady-state availability and cost-benefit analysis were performed. In [9], the author studied causes of the hot spot phenomenon and analyzed the output characteristics of photovoltaic arrays under shadow conditions. In [10], the author pointed out that partial shading conditions instigate the mismatch in the PV electrical characteristics and it induces the degradation in PV output energy.…”

Section: Introductionmentioning

confidence: 99%

Archives of Electrical Engineering

Wei,

2022

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The mismatch effect of photovoltaic (PV) arrays due to different illumination intensity has a significant impact on the output characteristics and output power of PV arrays, which is crucial to understand the output characteristics of PV arrays and optimize the array configuration in order to improve the value of the maximum power point. This paper illustrates the short-circuit current mismatch of series circuits, and the open-circuit voltage mismatch of parallel circuits and proposes corresponding solutions for each mismatch phenomenon. The output characteristics of multi-stage series PV arrays and multi-stage parallel PV arrays under complex illumination are analyzed by using the peak point approximation calculation method, and the distribution law of peak voltage points as well as the 𝐼-𝑉 (Current-Voltage) characteristic equation of each operating section are proposed. On this basis, the output characteristics of 3 × 3 centralized PV arrays are analyzed and verified by simulation. By comparing series and parallel PV arrays with the same condition, as well as several groups of centralized PV arrays with the same topology and different types of illumination distribution, this paper proposes a configuration optimization method for PV arrays. Matlab/Simulink simulation results confirm that the output power of parallel arrays is greater than that of series arrays under the same configuration and illuminationt distribution type, and the peak point is less than that of series arrays under the same configuration and lighting conditions; while in centralized PV arrays, the fewer series modules are shaded, the greater the output power and the less the peak point.

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Section: Introductionmentioning

confidence: 99%

Archives of Electrical Engineering

Wei,

2022

View full text Add to dashboard Cite

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Research on Output Characteristics of Different PV Array Structures with Partial Shadow

Cited by 1 publication

References 2 publications

Archives of Electrical Engineering

Archives of Electrical Engineering

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