COMPARISON OF WIND VIBRATION RESPONSE OF FLEXIBLE DRAGGING SUPPORT STRUCTURE AND TRADITIONAL RIGID SUPPORT STRUCTURE OF PHOTOVOLTAIC MODULES

Guo Tao; Yang Yuanming; Sun Zhen; Zhao Jianguang

doi:10.19912/j.0254-0096.tynxb.2023-0920

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (10) : 317-325. DOI: 10.19912/j.0254-0096.tynxb.2023-0920

COMPARISON OF WIND VIBRATION RESPONSE OF FLEXIBLE DRAGGING SUPPORT STRUCTURE AND TRADITIONAL RIGID SUPPORT STRUCTURE OF PHOTOVOLTAIC MODULES

Guo Tao¹, Yang Yuanming^1,2, Sun Zhen¹, Zhao Jianguang³

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Abstract

In recent years, the development of flexible support systems for photovoltaic modules has enabled photovoltaic projects to be effectively applied in disadvantaged landforms such as woodlands, slopes and canyons. In order to accurately explore the vibration characteristics of photovoltaic modules under the flexible support system, taking a project photovoltaic array as the research object, considering the influence of stable structure and load-bearing structure, the finite element models of the photovoltaic panels with traditional rigid support system and the flexible “mooring-photovoltaic panel array structure” support system respectively were established. Based on the Davenport wind spectrum, using the AR autoregressive technique to simulate the fluctuating wind load, the wind vibration response analysis was carried out. The economic benefits, wind vibration characteristics of the two support methods and the vibration effects of the stable structure on the flexible support. The result shows were compared： 1）The rigid support is mainly dominated by lateral swing, the average amplitude is about 0.5 cm, and its wind vibration coefficient is evenly distributed, the recommended value is 2.0. 2） The flexible support system mainly vibrates in the downwind direction, with an average amplitude of about 12.3 cm, which is larger than that of rigid system, and the recommended value of wind vibration coefficient is 1.7-1.8. 3）The construction cost of the flexible support system is about 40% higher than that of the traditional rigid support, but the covering area is reduced by about 32%. It shows that the flexible support is inferior to the traditional rigid support in terms of wind resistance and economy, but the advantage is mainly in the high adaptability to the terrain, and it can be used as a substitute for rigid support in inferior terrain. 4） The ground anchor drag structure has obvious restraint effect on displacement of photovoltaic panels. Therefore, the ground anchor drag structure can be appropriately added to increase the wind resistance of flexible support photovoltaic array.

Key words

photovoltaic modules / flexible support / rigid support / wind-induced vibration coefficient / mooring drag structure

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Guo Tao, Yang Yuanming, Sun Zhen, Zhao Jianguang. COMPARISON OF WIND VIBRATION RESPONSE OF FLEXIBLE DRAGGING SUPPORT STRUCTURE AND TRADITIONAL RIGID SUPPORT STRUCTURE OF PHOTOVOLTAIC MODULES[J]. Acta Energiae Solaris Sinica. 2024, 45(10): 317-325 https://doi.org/10.19912/j.0254-0096.tynxb.2023-0920

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