基于地形分布式模拟的四川省太阳能资源评估

利用四川省气象站常规观测数据和1∶25万数字高程(DEM)数据,根据地形因子(坡度和坡向)建立太阳辐射分布式模型,计算实际地形下的四川省太阳总辐射时空分布情况;评估分析了能体现太阳能资源的稳定度、资源丰富度、可利用价值等指标.结果表明:四川省复杂地形下的太阳总辐射多年平均年总量为1 800~7 200 MJ/m~2,盆地内与高原山地上总辐射值差异较大;总辐射冬季较小,夏季较大,在1981-2010年间降低5%;四川省太阳能资源自西向东规律分布,在太阳能资源稳定且丰富,可利用日数较长,具有开发利用价值的四川省攀西和三州(阿坝州、甘孜州、凉山州)地区可合理利用太阳能资源,在交通不便地区安装小型分布式发电设施;四川省高原和山地以东的盆地地区太阳能资源较差,但仍存在少量太阳能资源丰富地区,有适用中小型分布式发电设施的可能.

Assessment of Solar Energy Resource in Sichuan Based on Distributed Modeling on Rugged Terrains

A distributed model based on 1:250 000 DEM data and meteorological data has been established to calculate the solar total radiation (STR) over rugged terrains in Sichuan province, and the result is compared with the neighboring provinces at the same latitude. The indexes reflecting the stability of solar energy source, resource richness and use value (UV) are assessed and analyzed in this paper. The results show that the annual average STR of Sichuan Province is 1 800-7 200 MJ/m². There is a big difference in STR between the basin and plateau regions of the province. STR is more in summer than in winter and was reduced by 5% during 1981-2010. The STR in Sichuan province is regularly distributed from west to east. In Aba autonomous prefecture in the northern part of the province, Ganzi autonomous prefecture in the west and Liangshan autonomous prefecture in the south, the solar energy resource is rich and stable, with a sunshine duration of above 6 hours per day. The solar energy resource in these regions has development value. Although the traffic is inconvenient in some places, small-or medium-sized solar generators can be installed. In the basin area which is to the east of the plateau and mountainous areas, solar energy is poor. But there are some areas suitable for small-sized solar generators.