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A novel photovoltaic-pumped hydro storage microgrid applicable to rural areas

机译：一种适用于农村地区的新型光伏抽水蓄能微电网

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This paper proposes a novel photovoltaic-pumped hydro storage microgrid design, which is more cost-effective than photovoltaic-battery systems. Existing irrigation infrastructure is modified in order to store energy at a low cost. This energy storage system pumps water from the bottom of a water well to a reservoir at ground level to store surplus energy in the form of gravitational potential energy. This stored water can be released back to the well through a turbine to generate clean electricity when it is needed, or it can be used for irrigation. This microgrid needs a complex management system that takes into account energy generation, energy demand, water demand, energy tariff, and system losses to determine pump power, turbine flow rate, as well as irrigation times. The proposed energy management system considers the current and future state of the system and compares cost-saving and feed-in income for each decision by using two forecasting methods and a multi-level optimisation algorithm. The performance of the management system is experimentally verified on a real pump and turbine. The objective of this study is not only to manage pump power and turbine flow rate, but also to manage irrigation times and water volume. The results show that adding irrigation and water management assist the energy management system in using stored water more efficiently. As a result, electricity costs are reduced by more than 31% compared to existing management methods. The proposed system is simulated in MATLAB to calculate annual electricity costs. The payback period and lifetime benefit of the proposed storage are calculated to investigate the economic aspects of the system.
机译：本文提出了一种新颖的光伏泵蓄水微电网设计，它比光伏电池系统更具成本效益。修改了现有的灌溉基础设施，以便以低成本存储能源。该能量存储系统将水从水井底部抽至地面的水库，以重力势能的形式存储多余的能量。所存储的水可以在需要时通过涡轮机释放回井中以产生清洁电力，也可以用于灌溉。这种微电网需要一个复杂的管理系统，该系统必须考虑能源产生，能源需求，水需求，能源关税和系统损耗，以确定泵的功率，涡轮机流量以及灌溉时间。拟议中的能源管理系统考虑了系统的当前和未来状态，并通过使用两种预测方法和多级优化算法比较了每个决策的成本节省和供电收入。管理系统的性能已在真实的泵和涡轮机上进行了实验验证。这项研究的目的不仅在于管理泵的功率和涡轮机的流量，还在于管理灌溉时间和水量。结果表明，增加灌溉和水管理有助于能源管理系统更有效地利用储存的水。结果，与现有管理方法相比，电力成本降低了31％以上。所提出的系统在MATLAB中进行仿真以计算年度电费。计算建议存储的投资回收期和生命周期收益，以调查系统的经济方面。

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