基于储能船舶的海岛群电-氢混合能量调度策略

Hybrid Energy Dispatching Strategies for Island Group Electric Hydrogen Based on Energy Storage Ships

海岛/海上新能源的开发面临着电能送出难的问题。对于尚未通过海底电缆互联的海岛电网而言,富余新能源的制氢外送和电池外送模式各具优缺点。为结合2种外送模式的优点,提出了一种基于储能船舶的近海海岛群电-氢混合传输模式。首先,提出了基于储能船舶的海岛群能量互联共享模式,以电池包和储氢罐为载体,实现能量的灵活转化和在岛屿之间的灵活转移;其次,构建了电能-氢能转换效率的数学分析模型,并在综合考虑电池损耗和制氢效率的基础上,探讨了富余新能源在制氢与电池存储之间的最优功率分配机制,以厘清在不同新能源出力场景下2种外送模式的优劣;然后,通过搭建氢能储运成本分析模型,研究了压强、体积等压缩储氢关键参数与经济成本的关系,并提出了相应的电-氢混合输送日运行调度优化模型;最后,基于珠海市某群岛实际地理数据开展仿真分析,结果验证了所提方法的可行性和有效性。

The development of island/offshore new energy is often hindered with the difficulty in power transmission.For an island power grid that has not been interconnected through any submarine cables,the hydrogen generation and the battery delivery modes for the surplus new energy have their own advantages and disadvantages.To combine the advantages of the two modes,a hybrid electric hydrogen transmission mode based on the energy storage ships is proposed in this paper.Firstly,the energy interconnection and sharing mode of island groups based on the energy storage ships is put forward.The battery pack and the gas storage tank are used as carriers to realize the flexible transformation of the energy and the flexible transfer between the islands;Secondly,the mathematical analysis model of the electric and hydrogen energy conversion efficiency is constructed.By comprehensively considering the battery loss and the hydrogen production efficiency,the optimal power distribution mechanism between the hydrogen production and the battery storage for the surplus new energy is discussed to clarify the advantages and disadvantages of the two delivery modes under different new energy output scenarios;Then,by building the cost analysis model of the hydrogen energy storage and transportation,the relationship between the key parameters of the compressed hydrogen storage such as the pressure,the volume and the economic cost is studied,and the corresponding daily operation scheduling optimization model of the electric hydrogen mixed transportation is presented.Finally,simulation analysis is carried out based on the actual geographical data of an archipelago in Zhuhai City,Guangdong province.The results verify the feasibility and effectiveness of the proposed method.