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【Applied Energy最新原创论文】风电微网中电氢联合储能系统应用

AEii国际应用能源  · 公众号  ·  · 2023-07-05 21:30

正文

原文信息

Hybrid lithium-ion battery and hydrogen energy storage systems for a wind-supplied microgrid

原文链接:

https://www.sciencedirect.com/science/article/pii/S030626192300675X

Highlights

•Hybrid LIB-H 2 storage achieves lower cost of wind-supplied microgrid than single storage.

•LIB provides frequent intra-day load balancing, H 2 is deployed to overcome seasonal supply–demand bottlenecks.

•By 2050, the role of H 2 relative to LIB increases, but LIB remains important.

•System cost is sensitive to the cost of all H 2 components and LIB energy storage capacity cost.

摘要

具有高比例可再生能源(如风能)的微电网存在间歇性和不稳定的电力供应问题,导致时间上供需不匹配。锂离子电池和储氢是有前景的短期储能和长期储能技术。因此,电氢联合储能系统可以提供一种更具成本效益和可靠性的解决方案,以平衡可再生能源微网的负荷需求。现有文献已对电氢联合储能系统进行了建模,然而,未来不确定性的成本下降和性能提升将如何影响长期的系统成本和构成仍然未知。本文中,作者开发了一个混合整数线性规划模型用于优化加拿大100%风电微网(风力发电机、电解制氢、燃料电池、氢储能及锂离子电池)的容量配置。相比于锂电池或储氢单一储能,电氢联合储能系统能够显著降低成本。敏感性分析表明储氢系统组件会显著影响微网总成本,而锂电池系统的影响主要由储能容量成本决定。针对效率而言,电解制氢效率的降低导致总系统成本增加最大,而燃料电池效率提升则具有最高降低总系统成本的潜力。随着技术的发展,储氢系统在微电网中将扮演更重要的角色(即其规模更大,并在更长的时段内承担更多的能量调节),而锂电池将继续提供微网的频繁日内平衡调节。

更多关于“Hybrid energy storage system”的文章请见:

https://www.sciencedirect.com/search?qs=hybrid%20energy%20storage%20system&pub=Applied%20Energy&cid=271429

Abstr act

Microgrids with high shares of variable renewable energy resources, such as wind, experience intermittent and variable electricity generation that causes supply–demand mismatches over multiple timescales. Lithium-ion batteries (LIBs) and hydrogen (H 2 ) are promising technologies for short- and long-duration energy storage, respectively. A hybrid LIB-H 2 energy storage system could thus offer a more cost-effective and reliable solution to balancing demand in renewable microgrids. Recent literature has modeled these hybrid storage systems; however, it remains unknown how anticipated, but uncertain, cost reductions and performance improvements will impact overall system cost and composition in the long term. Here, we developed a mixed integer linear programming (MILP) model for sizing the components (wind turbine, electrolyser, fuel cell, hydrogen storage, and lithium-ion battery) of a 100% wind-supplied microgrid in Canada. Compared to using just LIB or H 2 alone for energy storage, the hybrid storage system was found to provide significant cost reductions. A sensitivity analysis showed that components of the H 2 subsystem meaningfully impact the total microgrid cost, while the impact of the LIB subsystem is dominated by its energy storage capacity costs. Regarding efficiency, decreased electrolyzer efficiency causes the greatest increase in total system cost, whereas increased fuel cell efficiency has the greatest potential to reduce total system cost. As technologies evolve, the H 2 subsystem assumes a greater role (i.e., it is larger and receives/supplies more energy over more hours) compared to the LIB subsystem, but LIB continues to provide frequent intra-day balancing in the microgrid.

Keywords

Hydrogen

Lithium-ion battery

Energy storage

Wind energy

Energy optimization

Techno-economic analysis

Graphics

Fig. 1. Methodology Overview.

Fig. 2. Hourly Energy Flows Through All Components of the Microgrid (First 48 Hours of the 2020 Hybrid Base Case). Positive values correspond to energy supply, and negative values correspond to energy consumption.







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