关键词: 太阳能资源, 容配比, 发电量, 投资 , 收益率

Abstract: The output of photovoltaic modules can hardly reach the nominal power due to the characteristics of solar resources. Therefore, the utilization rate of electrical equipment is low. The cost of per kWh PV generation can be reduced through improving the utilization rate of electric equipments by changing the capacity ratio of PV modules and electrical equipment. Based on an analysis of the solar energy resources of two cities, the Golmud City with abundant solar resources and the Nanjing City with relatively poor solar resources, the output power of PV modules with different capacity ratios and the power reaching inverter after output power reduction is calculated in this paper. Then the power limit ratios of PV projects with different capacity ratios are analyzed and the PV generation increment with different capacity ratios is accordingly calculated. The increments of initial investment and annual operating costs under different capacity ratios are determined. Finally, based on the calculated increments mentioned above, the internal rate of return(IRR) of the investment increment is analyzed.

Key words: solar energy resources, capacity ratio, generation output, investment, internal rate of return