Effects of large-scale photovoltaic power stations on near-surface microclimate in Mu Us sandy land —A case study of Yidangwan photovoltaic power station at Jingbian County, Shaanxi Province

Li Mengchao; Qu Jianjun; Tan Lihai; Wang Jingqi; Wang Yanxi

doi:10.13961/j.cnki.stbctb.2025.02.022

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Effects of large-scale photovoltaic power stations on near-surface microclimate in Mu Us sandy land —A case study of Yidangwan photovoltaic power station at Jingbian County, Shaanxi Province

- Effects of large-scale photovoltaic power stations on near-surface microclimate in Mu Us sandy land —A case study of Yidangwan photovoltaic power station at Jingbian County, Shaanxi Province
- Bulletin of Soiland Water Conservation Vol. 45, Issue 2, Pages: 211-222(2025)
- 作者机构：
  
  1. 西北大学城市与环境学院,陕西,西安,710127
  2. 南方海洋科学与工程广东省实验室(广州),广东,广州,511458
  3. 中国科学院西北生态环境资源研究院,甘肃,兰州,730000
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2025.02.022
  CLC： P426.1
- Online First：16 May 2025，
  
  Published：2025
- 稿件说明：
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Li Mengchao, Qu Jianjun, Tan Lihai, et al. Effects of large-scale photovoltaic power stations on near-surface microclimate in Mu Us sandy land —A case study of Yidangwan photovoltaic power station at Jingbian County, Shaanxi Province[J]. Bulletin of Soiland Water Conservation, 2025, 45(2): 211-222.
DOI：

Li Mengchao, Qu Jianjun, Tan Lihai, et al. Effects of large-scale photovoltaic power stations on near-surface microclimate in Mu Us sandy land —A case study of Yidangwan photovoltaic power station at Jingbian County, Shaanxi Province[J]. Bulletin of Soiland Water Conservation, 2025, 45(2): 211-222. DOI： 10.13961/j.cnki.stbctb.2025.02.022.

摘要

[目的] 揭示光伏电站内外近地表微气象特征的差异，评估毛乌素沙地大型光伏电站布设对近地表微气象的影响，为光伏电站风沙防治和生态修复提供科学依据。[方法] 利用自动气象站的观测数据，通过对比对照点和站内各观测点得到微气象要素(风速、风向、气温、相对湿度、辐射)评估毛乌素沙地大型光伏电站的布设对近地表微气象的影响。[结果] ①相比对照区域，两种光伏阵列在2 m高度处的风向均发生显著变化，呈现出更为单一的特征。②光伏阵列区域的气温有所降低，固定可调光伏板间和板下的最大降温分别为0.92 ℃和0.97 ℃，而平单轴光伏板间和板下的最大降温分别为2.24 ℃和2.46 ℃。③光伏阵列区域的空气相对湿度有所增加，固定可调光伏区域的最大增幅出现在12月，板间和板下分别增加了3.77%和2.31%；平单轴光伏区域在3月份增幅最大，板间和板下分别增加了15.86%和15.44%。④光伏阵列对辐射的影响主要体现在光伏板下区域，其中固定可调光伏板下和平单轴光伏板下的太阳辐射量最大分别减少了91.30%和88.27%，光合有效辐射量最大分别减少了91.06%和82.29%。[结论] 大型光伏电站具有改变风向，降低气温，增加相对湿度以及减少地表太阳辐射量和光合有效辐射量的作用。其中，平单轴光伏阵列在“降温增湿”方面的效果优于固定可调光伏阵列。

Abstract

[Objective] The differences in near-surface micrometeorological characteristics inside and outside photovoltaic (PV) power plants were revealed

and the impact of large-scale PV power plant deployment on near-surface microclimate in Mu Us sandy land was evaluated

in order to provide a scientific basis for wind-sand control and ecological restoration in PV power plants. [Methods] Observational data were gathered from automatic weather stations to assess how the layout of photovoltaic power stations in the Mu Us sand land affects the near-surface microclimate. Microclimate elements (wind speed

wind direction

air temperature

relative humidity

and radiation) were compared between control points and various observation points within the station. [Results] ① Compared to the control area

both types of photovoltaic arrays exhibited significant changes in wind direction at a height of 2 m

presenting a more monotonous pattern. ② The temperature within the photovoltaic array areas was reduced. The maximum temperature decreases recorded between and beneath the fixed adjustable photovoltaic panels were 0.92 ℃ and 0.97 ℃

respectively. In comparison

the horizontal

single-axis photovoltaic panels showed maximum temperature reductions of 2.24 ℃ and 2.46 ℃ between and beneath the panels

respectively. ③ The relative humidity of the air in the photovoltaic array area increased

with the greatest increments occurring in the fixed adjustable photovoltaic area in December

where the inter-panel and under-panel areas increased by 3.77% and 2.31%

respectively. The horizontal

single-axis photovoltaic area experienced the largest increase in March

with inter- and under-panel areas rising by 15.86% and 15.44%

respectively. ④ The impact of the photovoltaic arrays on radiation was predominantly observed beneath the panels

with maximum reductions in solar radiation beneath the fixed adjustable and horizontal

single-axis photovoltaic panels of 91.30% and 88.27%

respectively

and maximum reductions in photosynthetically active radiation of 91.06% and 82.29%

respectively. [Conclusion] The deployment of large-scale photovoltaic power stations can alter wind direction

reduce air temperature

increase relative humidity

and decrease surface solar radiation and photosynthetically active radiation. Notably

the horizontal

single-axis photovoltaic array outperformed the fixed adjustable photovoltaic array in terms of its capacity to lower temperature and increase humidity.

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Keywords

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