浙江省光伏最佳倾角及斜面总辐射研究
Research on Optimum Tilt Angle for PV Array and Global Solar Radiation on Inclined Surfaces in Zhejiang Province
中文摘要：
基于浙江省1993—2021年日照时数、太阳总辐射及散射辐射观测数据，采用Angstrom-Prescott模型、斜面辐射模型，计算各个站点的水平面、最佳斜面的太阳总辐射量，并对比分析其空间分布特征差异。结果表明：浙江省水平面的年平均总辐射为4500～4910 MJ·m－2；浙江省最佳倾角角度为23°～27°，最佳斜面的年平均总辐射为4749～5365 MJ·m－2，总体呈现由东北向西南递减的趋势，其中杭州湾一带及舟山沿海地区为高值区，浙西南山区为低值区；浙江省最佳倾斜面上的太阳总辐射较水平面上总辐射值有明显提升，增加量为240～460 MJ·m－2，增加了5.3%～9.4%；浙北北部地区太阳总辐射增加量较大，达到360 MJ·m－2（7.7%）以上，浙南地区太阳总辐射增加量较小，低于280 MJ·m－2（6.2%）。
中文关键词：
太阳辐射，最佳倾角，斜面辐射
KeyWords：
global solar radiation, optimum tilt angle, solar radiation on inclined surface
Abstract：
Based on sunshine hours, global radiation observational data and scattered radiation data in Zhejiang Province during 1993－2021, we utilize Angstrom-Prescott model and tilt radiation model to calculate the global solar radiation on optimum tilt angle and on horizontal plane at different stations and to analyze the differences in spatial distribution characteristics. The results show that the annual average global solar radiation on horizontal plane in Zhejiang Province ranges between 4500 and 4910 MJ·m－2. The optimum tilt angle for PV array is 23°～27°in Zhejiang Province. And the annual average global solar radiation on optimum inclined surfaces reachs 4749～5365 MJ·m－2, which exhibits a decreasing tendency from the northeast to the southwest. The higher value is identified around Hangzhou Bay and in Zhoushan coastal areas, and the lower value is in the mountain area of southwestern Zhejiang. The global solar radiation on optimum inclined surfaces is significantly enhanced than that on horizontal planes, with the increase of 240～460 MJ·m－2 (5.3%～9.4%). The increase is more prominent in the north of Zhejiang, with the increment over 360 MJ·m－2 (7.7%), while the increase is relatively small in the south of Zhejiang, lower than 280 MJ·m－2 (6.2%).