Wave energy power take-off design of hybrid energy storage system
Wave energy power take-off design of hybrid energy storage system
复制标题
混合储能系统波浪能取力器设计
DOI：
10.1049/icp.2023.1999
复制
发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Jiang C
中科院分区：
文献类型：
--
作者：
Jiang C
尽管海洋波浪能资源广泛，但波浪能尚未成为主流的可再生能源。一个原因是从波能转换器提取的具有低平均峰值比的波动功率。本文评估了一种混合动力储能系统的动力起飞，结合锂离子电池和超级电容器单元，提供电力平滑。通过双向DC-DC转换器将能量存储集成到DC链路中，可以有效地使用超级电容器来应对极端的短期功率波动，并使用电池来实现长期功率平衡。通过MATLAB/ Simulink仿真验证了该设计在不同荷电状态和输入海况下提供直流电压调节和吸收波动电流的可行性。在全开关仿真模型上对双闭环PI控制的半桥变换器进行了实验。计算结果表明，所设计的储能装置能够平滑波浪能，平衡电池单元和超级电容器单元的能量密度和功率密度的优势。
Despite widespread marine wave energy resources, wave energy has not become a mainstream renewable energy source. One reason is the fluctuating power with low average to peak ratio extraction from the wave energy converter. This paper evaluates a hybrid energy storage system in the power take-off, combining a lithium-ion battery and super-capacitor unit, to provide power smoothing. The integration of energy storage into the DC-link through bidirectional DC-DC converters enables effective use of the super-capacitor for extreme short-term power fluctuations, with the battery for long-term power balance. The feasibility of this design to provide DC voltage regulation and absorb fluctuating currents under different states of charge and input sea states is verified through MATLAB/ Simulink with representative power data from a kW-scale 20m wave platform. The half-bridge converter with double-closed-loop PI control is tested in a full-witching simulation model. The obtained results confirm that the designed energy storage can smooth the wave power and balance the benefits of energy density and power density in the battery unit and super-capacitor unit respectively.