JOINT PROBABILITY DISTRIBUTION MODEL FOR FLUCTUATING WIND LOAD ON UPPER AND LOWER SURFACES OF LARGE-SPAN FLEXIBLE PV ARRAYS BASED ON WIND TUNNEL TESTS

Zhang Chunwei; Ke Shitang; Yu Wei; Wang Lishan; Ren Hehe; He Zhengdong

doi:10.19912/j.0254-0096.tynxb.2024-0454

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (7) : 701-709. DOI: 10.19912/j.0254-0096.tynxb.2024-0454

Special Topics of Academic Papers at the 102th Annual Meeting of the China Association for Science and Technology

JOINT PROBABILITY DISTRIBUTION MODEL FOR FLUCTUATING WIND LOAD ON UPPER AND LOWER SURFACES OF LARGE-SPAN FLEXIBLE PV ARRAYS BASED ON WIND TUNNEL TESTS

Zhang Chunwei¹, Ke Shitang¹, Yu Wei¹, Wang Lishan¹, Ren Hehe¹, He Zhengdong²

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Abstract

Taking the 5×3 PV arrays of State Power Investment Group Flexible PV Demonstration Base in Yancheng, Jiangsu as the research object, synchronous rigid body pressure wind tunnel tests were designed and carried out on the upper and lower surfaces. The three-dimensional spatial correlation of fluctuating wind load was analyzed, the edge distribution model and joint probability distribution model of fluctuating wind load on the upper and lower surfaces of PV arrays were established based on Copula theory. Research has shown that under the most unfavorable wind direction angles of 0 ° and 180 °, the maximum overall fluctuating wind load of PV arrays occurs at the windward leading edge of row #3. The overall fluctuating wind load on the upper and lower edges of PV panels is controlled by the upper and lower surfaces respectively; Taking the kernel density function as the edge distribution model, Frank Copula and Gumbel Copula functions are the optimal functions for constructing the joint probability distribution models of “overall- upper/lower surfaces” fluctuating wind load on the upper/lower edge of PV arrays respectively; The proposed joint probability distribution models can accurately describe the binary distribution characteristics of fluctuating wind load in PV arrays, and achieve effective prediction of overall fluctuating wind load based on single surfaces of PV panels.

Key words

photovoltaic systems / wind tunnels / wind load / spatial correlation / joint probability distribution

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Zhang Chunwei, Ke Shitang, Yu Wei, Wang Lishan, Ren Hehe, He Zhengdong. JOINT PROBABILITY DISTRIBUTION MODEL FOR FLUCTUATING WIND LOAD ON UPPER AND LOWER SURFACES OF LARGE-SPAN FLEXIBLE PV ARRAYS BASED ON WIND TUNNEL TESTS[J]. Acta Energiae Solaris Sinica. 2025, 46(7): 701-709 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0454

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