Large-scale electric vehicles(EVs) connected to the micro grid would cause many problems. In this paper, with the consideration of vehicle to grid(V2 G), two charging and discharging load modes of EVs were constructed...Large-scale electric vehicles(EVs) connected to the micro grid would cause many problems. In this paper, with the consideration of vehicle to grid(V2 G), two charging and discharging load modes of EVs were constructed. One was the disorderly charging and discharging mode based on travel habits, and the other was the orderly charging and discharging mode based on time-of-use(TOU) price;Monte Carlo method was used to verify the case. The scheme of the capacity optimization of photovoltaic charging station under two different charging and discharging modes with V2 G was proposed. The mathematical models of the objective function with the maximization of energy efficiency, the minimization of the investment and the operation cost of the charging system were established. The range of decision variables, constraints of the requirements of the power balance and the strategy of energy exchange were given. NSGA-Ⅱ and NSGA-SA algorithm were used to verify the cases, respectively. In both algorithms, by comparing with the simulation results of the two different modes, it shows that the orderly charging and discharging mode with V2 G is obviously better than the disorderly charging and discharging mode in the aspects of alleviating the pressure of power grid, reducing system investment and improving energy efficiency.展开更多
在“双碳”背景下,电制氨技术(renewable power to ammonia,RePtA)因能规模化消纳可再生能源与绿氢而受到广泛关注。然而,RePtA系统中可再生能源制氢量具有明显波动性,这对哈伯-博世合成氨工艺的稳定运行带来挑战。对此,提出了一种合成...在“双碳”背景下,电制氨技术(renewable power to ammonia,RePtA)因能规模化消纳可再生能源与绿氢而受到广泛关注。然而,RePtA系统中可再生能源制氢量具有明显波动性,这对哈伯-博世合成氨工艺的稳定运行带来挑战。对此,提出了一种合成氨离散多稳态柔性运行策略,并使用PSO-MILP算法建立了一个协同化工运行调度的容量配置两阶段优化模型,基于内蒙古某在建示范项目,对比分析了3种不同柔性方案的技术经济性能。研究表明:离散多稳态柔性策略相比传统稳态策略,经济性大幅度提高,年收益可增加6715万元;相比完全柔性策略,合成氨工艺的运行稳定性显著增强,生产负荷波动率降低了78.16%。该优化模型可以兼顾RePtA系统的投资经济性与运行安全性,其成果有望为实际生产运行提供一定指导。展开更多
基金Project(3502Z20179026)supported by Xiamen Science and Technology Project,China。
文摘Large-scale electric vehicles(EVs) connected to the micro grid would cause many problems. In this paper, with the consideration of vehicle to grid(V2 G), two charging and discharging load modes of EVs were constructed. One was the disorderly charging and discharging mode based on travel habits, and the other was the orderly charging and discharging mode based on time-of-use(TOU) price;Monte Carlo method was used to verify the case. The scheme of the capacity optimization of photovoltaic charging station under two different charging and discharging modes with V2 G was proposed. The mathematical models of the objective function with the maximization of energy efficiency, the minimization of the investment and the operation cost of the charging system were established. The range of decision variables, constraints of the requirements of the power balance and the strategy of energy exchange were given. NSGA-Ⅱ and NSGA-SA algorithm were used to verify the cases, respectively. In both algorithms, by comparing with the simulation results of the two different modes, it shows that the orderly charging and discharging mode with V2 G is obviously better than the disorderly charging and discharging mode in the aspects of alleviating the pressure of power grid, reducing system investment and improving energy efficiency.
文摘在“双碳”背景下,电制氨技术(renewable power to ammonia,RePtA)因能规模化消纳可再生能源与绿氢而受到广泛关注。然而,RePtA系统中可再生能源制氢量具有明显波动性,这对哈伯-博世合成氨工艺的稳定运行带来挑战。对此,提出了一种合成氨离散多稳态柔性运行策略,并使用PSO-MILP算法建立了一个协同化工运行调度的容量配置两阶段优化模型,基于内蒙古某在建示范项目,对比分析了3种不同柔性方案的技术经济性能。研究表明:离散多稳态柔性策略相比传统稳态策略,经济性大幅度提高,年收益可增加6715万元;相比完全柔性策略,合成氨工艺的运行稳定性显著增强,生产负荷波动率降低了78.16%。该优化模型可以兼顾RePtA系统的投资经济性与运行安全性,其成果有望为实际生产运行提供一定指导。
