Abstract Micro-grid is a promising technology for the energy reform in urban areas. This paper takes a building as a case study to construct a micro-grid system, which includes rooftop photovoltaic and pumped storage systems according to the characteristics of the building. Moreover, the cost–benefit analysis of the commercial building micro-grid system is also performed to obtain an in-depth understanding of the feasibility of the project. According to the characteristics of power load of commercial buildings, the working characteristics of the developed micro-grid and the mathematical model of optimal operation of micro-grid in commercial buildings is constructed. The calculation results from the mathematical model show that the dynamic payback period (PBP) of the micro-grid system of commercial buildings is 4.74 years, while the dynamic PBP of the micro-grid system of battery energy storage is 7.95 years. Therefore, the micro-grid system pumped storage has a much better economy than that with battery energy storage.

中文翻译：

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考虑光伏与抽水蓄能的楼宇一体化微电网性能与经济性研究——以佛山市为例

摘要 微电网是城市地区能源改革的一项有前途的技术。本文以某建筑为案例，根据建筑特点构建了一个微电网系统，包括屋顶光伏和抽水蓄能系统。此外，还对商业建筑微电网系统进行了成本效益分析，以深入了解项目的可行性。根据商业建筑用电负荷的特点，构建了已开发微电网的工作特点和商业建筑微电网优化运行的数学模型。数学模型计算结果表明，商业建筑微电网系统的动态投资回收期（PBP）为4.74年，而电池储能微网系统的动态PBP为7.95年。因此，微电网系统抽水蓄能比电池储能具有更好的经济性。