考虑氢能交通运输时空特性的电-氢综合能源系统协同优化方法

Collaborative Optimal Method for Electricity-Hydrogen Integrated Energy System Considering Spatial-temporal Characteristics of Hydrogen Transportation

电-氢综合能源系统(EH-IES)在新时代背景下有巨大潜力,受限于现有输氢管道长度,EHIES可视为由多个氢能子系统(HES)和电力网络耦合而成。若要充分利用EH-IES运行灵活性,可在考虑EH-IES协同优化的同时,利用氢储能的可移动性实现氢能在多个HES之间的最优调度。为此,提出了一种“就地制氢-交互运氢”的运行模式。以EH-IES为研究对象、总运行成本最小为目标函数,考虑氢气长管拖车(HT)运输所需时间与HES交互运行,建立了包含可再生能源、电制氢储氢站(PHSS)、HT、电氢负荷的综合能源系统联合优化模型。通过9辆HT、3座PHSS接入IEEE 30节点系统的算例对比分析了各HES交互对系统优化的影响,结果表明:所建立的优化模型能够减少总运行成本,提升风电消纳水平,提高电力系统运行灵活性,验证了所提模式的有效性与可行性。

The electricity-hydrogen integrated energy system(EH-IES)has great potential in the context of the new era.Limited by the length of the existing hydrogen pipeline,the EH-IES can be seen as a coupling of multiple hydrogen energy subsystems(HESs)and the power grid.To make full use of the operation flexibility of EH-IES,the mobility of hydrogen energy storage can be used to achieve the optimal scheduling of hydrogen energy among multiple HESs while considering the collaborative optimization of EHIES.Therefore,an operation mode of“on-site hydrogen production and interactive hydrogen transportation”is proposed.Taking EH-IES as the research object and minimizing the total operation cost as the objective function,considering the hydrogen tube trailer(HT)transportation time and the interactive operation of HESs,a joint optimization model of an IES is established including renewable energy,power-to-hydrogen and storage station(PHSS),HT,and electric load and hydrogen load.Through the case of nine HTs and three PHSSs connected to the IEEE 30-bus system,the influence of HES interaction on system optimization is compared and analyzed.The results show that the established optimization model can reduce the total operation cost,improve the wind power accommodation level,and improve the flexibility of the power system operation,which verifies the effectiveness and feasibility of the proposed model.