光伏支架差异冻胀融沉偏移对光伏组件发电量影响的研究  

RESEARCH ON INFLUENCE OF DIFFERENTIAL FROST HEAVE AND THAW SETTLEMENT DEVIATION OF PV BRACKETS ON POWER GENERATION CAPACITY OF PV MODULES

作　　者：吕妍[1] 张慧琪 张谧 王迪[1] 付世博 田航臣 Lyu Yan;Zhang Huiqi;Zhang Mi;Wang Di;Fu Shibo;Tian Hangchen(School of Physics and Electronic Engineering,Northeast Petroleum University,Daqing 163318,China;Engineering Design Institute of CNPC Offshore Engineering Co.,Ltd,Beijing 100028,China;School of Architecture and Civil Engineering,Northeast Petroleum University,Daqing 163318,China)

机构地区：[1]东北石油大学物理与电子工程学院,大庆163318 [2]中国石油海洋工程有限公司工程设计院,北京100028 [3]东北石油大学土木建筑工程学院,大庆163318

出　　处：《太阳能》2023年第6期36-41,共6页Solar Energy

基　　金：大庆市新能源领域“揭榜挂帅”科技攻关项目(HGS-KJ/KJGLB-[2021]第30号);东北石油大学优秀中青年科研创新团队项目(KYCXTD201901)。

摘　　要：大庆地区的地质属于严寒地区的季节性冻土,在冬季时光伏支架基础易发生不均匀冻胀抬升,而在春季时,由于气温升高支架基础易产生融沉现象,出现差异冻胀融沉情况,从而导致光伏支架发生偏移,进而改变光伏组件的安装倾角,最终导致光伏组件发电量受到影响。采用光伏支架因土基差异冻胀融沉引起的偏移程度表征光伏组件安装倾角偏移量,利用光伏发电系统设计软件PVsyst 7.2开展光伏组件安装倾角偏移量对其发电量影响的分析。结果表明:光伏组件日发电量随安装倾角变化在不同节气下呈现不同规律,虽然安装倾角的正负偏移不会使各节气时的日发电量最大值出现在初始安装倾角(最佳安装倾角)时,但在初始安装倾角下光伏组件年总发电量仍为最高,安装倾角正偏移使发电量降低幅度更高。以期通过光伏支架及桩基础差异冻胀融沉偏移研究为保障光伏组件使用寿命和光伏电站发电效率提供参考。The geology of Daqing area belongs to the seasonal frozen soil of severe cold regions.In winter,the foundation of PV brackets is prone to uneven frost heave and uplift.In spring,due to the increase in temperature,the bracket foundation is prone to thaw settlement,resulting in differential frost heave and thaw settlement,which leads to the deviation of PV brackets and changes the installation inclination angle of PV modules.Ultimately,the power generation capacity of PV modules is affected.This paper uses the degree of displacement caused by frost heave and thaw settlement of PV brackets due to differences in soil foundation to characterize the installation inclination angle deviation of PV modules.The PV power generation system design software PVsyst 7.2 is used to analyze the impact of installation inclination angle deviation of PV modules on their power generation capacity.The results show that the daily power generation capacity of PV modules varies with the installation inclination angle under different solar terms.Although the positive and negative deviation of the installation inclination angle does not cause the maximum daily power generation capacity at each solar term to appear at the initial installation inclination angle(optimal installation inclination angle),the annual total power generation capacity of PV modules is still the highest at the initial installation inclination angle.The positive deviation of the installation inclination angle leads to a higher reduction in power generation capacity.It is hoped that the research on differential frost heave and thaw settlement deviation of PV bracket and pile foundation can provide reference for ensuring the service life of PV modules and the power generation efficiency of PV power station.

关 键 词：光伏支架 PHC桩基础 光伏组件 差异冻胀融沉 安装倾角 发电量 偏移 

分 类 号：TM615[电气工程—电力系统及自动化]