摘要
首先,以方位角和倾角作为研究出发点,建立倾斜面上接收到的太阳辐射量的计算模型.通过计算确定了天津地区朝向和偏离正南方位倾斜面的最佳光伏方阵安装方案:朝向正南时,按35°倾角安装;偏离正南时,与不同的方位角对应有一个最佳倾角范围.然后,基于对天津某小区屋顶分布式光伏并网发电系统的研究发现:在光照较强月份,因方位角与安装倾角的不同而带来的发电量差异最大可以达到34%,高于在光照较弱月份表现的差额.就全天发电情况来看:上午时在光电转换量上,太阳辐射量中的直射辐射光电转换量高于散射辐射的部分,而在光电转换速率上,则刚好相反;下午时,散射辐射量占比的变化是减弱发电子系统之间因方位角和安装倾角不同对发电量影响的主要因素.
In this paper, the starting point is based on the azimuth angle and dip angle, the calculation model of the solar radiation received on tilted surface is established, and the optimal PV array installation scheme under PV panel orienting deviating from the south in Tianjin area is determined by calculating: toward the north, the angle is 35°;deviating from south, there should be an optimum dip range with different azimuth angles. Then, based on the research of a rooftop distributed PV grid-connected generation system in a certain plot in Tianjin, it shows that the biggest difference of power generation in high radiation intensity months caused by azimuth and installation inclination can reach 34%, which is higher than that in low radiation intensity months. As for the power generation situation during whole day, in the morning, the amount of photoelectric conversion derived from direct solar radiation is higher than the part of the scattering radiation, while in the photoelectric conversion rate, it is totally opposite. In the afternoon, the variation of the scattering radiation ratio is the main factor to weaken the influence of different azimuth and angle on the power generation.
作者
房丽硕
吕建
霍雨霞
FANG Lishuo;LU Jian;HUO Yuxia(School of Energy and Safety Engineering, TCU, Tianjin 300384, China)
出处
《天津城建大学学报》
2019年第4期284-289,共6页
Journal of Tianjin Chengjian University
基金
国家自然科学基金(5167082843)
关键词
分布式光伏并网发电系统
方位角
最佳倾角
年发电量
distributed photovoltaic grid-connected generation system
azimuth angle
optimum dip
annual power generation
