Abstract
Liquid Air Energy Storage (LAES) is a thermo-mechanical-based energy storage technology, particularly suitable for storing a large amount of curtailed wind energy. The integration of LAES with wind power is clearly dynamic, but seldom has been addressed in terms of the integration strategy. To reveal the dynamic characteristics of LAES when smoothing wind power, both the component- and system-level dynamic models of a LAES discharging unit were established, followed by wind power decomposition and the power following tests. The first result shows that a 300 kW LAES discharging unit is more suitable for responding to the wind power component with time scale greater than ∼ 125 s (0–0.008 Hz). To address the faster-frequency (0.008–0.5 Hz) component of wind power, the hybrid storage solutions combining LAES with batteries were proposed and analysed both technically and economically. The comparison results show that the annual cost of a wind-battery system doubles more than that of a wind-LAES-battery system; and the larger the wind farm, the more economic advantages offered by the hybrid storage solution. Overall, this work investigated the dynamic characteristics of the integrated wind-LAES-battery energy systems for the first time. The result reveals the technical feasibility and economic advantages of hybrid energy storage systems for wind integration.
| Original language | English |
|---|---|
| Article number | 122415 |
| Journal | Applied Thermal Engineering |
| Early online date | 14 Jan 2024 |
| DOIs | |
| Publication status | E-pub ahead of print - 14 Jan 2024 |
Bibliographical note
Acknowledgement:Ting Liang acknowledge the partial support from Priestley Joint Ph.D. Scholarship from the University of Birmingham (UK) and University of Melbourne (Australia); Yongliang Li acknowledge the Co-Cool project and Hi-CAES project;
Keywords
- Liquid air energy storage (LAES)
- Wind integration
- Wind power decomposition
- Integrated/hybrid storage system
- Battery
- Economic comparison