To understand the operational strategies and effects of photovoltaic-energy storage sys-tems in standalone residential buildings under different electricity pricing modes,a model was de-veloped for the electricity consumption of sample buildings and the power generation of photovol-taic systems.Two operational strategies,namely regular operation mode and mixed operation mode,were developed for photovoltaic-energy storage systems under two scenarios:tiered elec-tricity pricing and time of use electricity pricing.Subsequently,the economic indicators net pres-ent value(NPV)and self consumption rate(SC)of the photovoltaic-energy storage system for single family residential buildings were analyzed for four energy storage unit prices ranging from 1 000 to 2 500 yuan/(kW·h)as the energy storage capacity increased.The results show that the larger the installed capacity of photovoltaic,the higher the initial NPV value.In the conventional operating mode,the self consumption rate of photovoltaic systems with different installed capaci-ties gradually increases with the increase of energy storage capacity,while in the mixed operating mode,the self absorption rate basically does not change with the increase of energy storage capac-ity.In both operating modes,the optimal energy storage capacity considering only economy is lo-cated at the highest point of the NPV curve,and different photovoltaic installed capacities will re-sult in different initial values and rankings of NPV.
关键词
独栋住宅/光伏-储能/电价模式/储能容量
Key words
single residential buildings/photovoltaic-energy storage/electricity pricing model/energy storage capacity
维普
万方数据