王春艺 赵亮亮 杨   峰（中国航空规划设计研究总院有限公司，北京市 100120）

Selection Strategy for Installation Inclination Angle of Distributed Photovoltaic

Systems on Roofs with Limited Space

WANG Chunyi ZHAO Liangliang YANG Feng

(China Aviation Planning and Design Institute(Group)Co.,Ltd.,Beijing 100120，China)

Abstract：The solar irradiation calculation model of a distributed photovoltaic (PV) system for roofs with limited space considering array shadow shading is studied, and eight representative cities in China are selected to study the effects of different installation inclination angles on the installed capacity, power generation and rate of return on capital of the project. The findings show that it is not necessary to use the optimal inclination angle of total annual irradiation as the installation inclination angle for distributed PV projects on roofs with limited space. Appropriately lowering the installation inclination can significantly increase the installed capacity and power generation with essentially no impact on the rate of return on capital. This phenomenon is more pronounced for projects in high latitudes.

Key words：roofs with limited space;distributed PV systems;PV array spacing;installation inclination angle;optimal inclination angle;installed capacity;power generation;rate of return on capital

摘　要：研究有限空间屋面考虑阵列阴影遮挡的分布式光伏系统太阳辐照计算模型，并选取我国有代表意义的 8 个城市，研究不同安装倾角对项目装机量、发电量和资本金收益率的影响。结果表明：对于有限空间屋面上的分布式光伏项目，不必采用年总辐照量最佳倾角作为安装倾角，适当降低安装倾角，可在基本不影响资本金收益率的前提下，显著增加装机量和发电量，此现象对于高纬度地区项目更加明显。

关键词：有限空间屋面；分布式光伏系统；光伏阵列间距；安装倾角；最佳倾角；装机量；发电量；资本金收益率

中图分类号：TM615                　  文献标识码：A

doi：10.3969 / j. issn.1003 － 8493.2024.06.011