LOADING PERFORMANCES AND OPTIMAL DESIGN OF BRACKET-FOUNDATION OF FLAT UNIAXIAL PHOTOVOLTAIC TRACKERS

Wang Longwei; Li Ru; Dou Hongqiang; Xie Senhua

doi:10.19912/j.0254-0096.tynxb.2023-1015

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (10) : 345-353. DOI: 10.19912/j.0254-0096.tynxb.2023-1015

LOADING PERFORMANCES AND OPTIMAL DESIGN OF BRACKET-FOUNDATION OF FLAT UNIAXIAL PHOTOVOLTAIC TRACKERS

Wang Longwei¹, Li Ru¹, Dou Hongqiang², Xie Senhua²

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Abstract

Taking a large-scale photovoltaic power station in alpine and high-altitude area with flat uniaxial photovoltaic racking system as the background, relying on ABAQUS finite element simulation software, we constructed an integrated three-dimensional finite element model of large-span flat uniaxial photovoltaic bracketing-foundation-panel, explored the loading characteristics of the key components of the flat uniaxial photovoltaic tracking system and the mechanism of instability deformation in an extreme environment, and provided the targeted optimization design suggestions. The results show that, under extreme wind load, the maximum stress of purlins in this large-span PV system reaches 544.4 MPa and the maximum displacement of columns reaches 76.3 mm at the maximum tracking angle, resulting in the potential risk of yield damage of local purlins and H-type steel piles; the deformations of superstructure members are related to their locations, and the overall performance shows that they are distributed in a wavy pattern along the long axis of the main girder, the mid-span position of the two columns also has a large displacement. The maximum deformation under wind load is even 153.2 mm, which is most obvious at the cantilever end of the PV module, and it is proposed to enhance the strength of the local components or change the local structural characteristics to enhance the overall stability of the large-span flat uniaxial tracking PV system.

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photovoltaic system / numerical modeling / load limits / flat uniaxial / mechanical properties / trackers

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Wang Longwei, Li Ru, Dou Hongqiang, Xie Senhua. LOADING PERFORMANCES AND OPTIMAL DESIGN OF BRACKET-FOUNDATION OF FLAT UNIAXIAL PHOTOVOLTAIC TRACKERS[J]. Acta Energiae Solaris Sinica. 2024, 45(10): 345-353 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1015

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