Abstract
Shaanxi province has three land forms which are Shaanxi’s northern plateau, Guanzhong plain and Qinba mountain land in the south of Shaanxi province. So the climate type is also divided into three types and the solar energy resources distribution has a big gap between different regions. PV modules, as the core component of off-grid home photovoltaic power system, their output power are mainly influenced by sun radiation, array tile angle, temperature and so on. Based on the reasons above, in order to apply off-grid home photovoltaic power system in Shaanxi region, this paper designs different systems with different configuration, and makes the performance prediction. The results show that the capacity of PV modules reaches to the largest in Shaanxi northern region, reach minimum in Shaanxi southern region and the output power in the winter is less than in the summer and reach minimum in the spring and autumn. In light of the characteristics above, this research select different type and configuration in different areas systematically, and the performance analysis shows that the configuration can meet the basic life demand of power to the people whose power is not available.
Highlights
It is about 870 kilometers from Shaanxi northern to Shaanxi southern
The climate type is divided into three types and the solar energy resources distribution has a big gap between different regions
PV modules, as the core component of off-grid home photovoltaic power system, their output power are mainly influenced by sun radiation, array tile angle, temperature and so on
Summary
It is about 870 kilometers from Shaanxi northern to Shaanxi southern. Shaanxi province has three landforms which are Shaanxi northern plateau, Guanzhong plain and Qinba mountain land in south of Shaanxi. Shaanxi northern region belongs to warm temperate zone arid and semiarid climate. Guanzhong belongs to warm temperate zone semi-humid climate and Shaanxi southern region belongs to north subtropical humid climate. In this case, the distribution of solar energy resource has a big gap in different regions, especially between north and south in Shaanxi province, the annual total sunshine radiation is 3830-5750 MJ/m2, the annual sunshine hours is 12702900 hours and sunshine percentage is 28% - 64%. Off-grid home photovoltaic power system mainly consists of PV modules, batteries, controller and inverter. Based on the above reasons, in order to apply off-grid home photovoltaic power system in Shaanxi region, this paper designs different system with different configuration, and makes the performance prediction
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