考虑低碳排放的并网型风电制氢加氢站优化运行

Optimal Operation of Hydrogen Refueling Stations by Grid-Connected Wind Power Considering Low Carbon Emissions

并网型风电制氢系统能满足加氢站的稳定加氢需求,因此有必要对并网型风电制氢加氢站的优化运行进行研究。建立了电-氢耦合模型,分别采用两个方案设定目标函数,考虑了电力功率约束、氢气容量约束和风电的零弃风运行等约束条件,采用改进粒子群算法求解上述模型。算例结果表明,所提求解算法收敛性较好。若仅考虑加氢站购电费用最小,会出现加氢站与电网的联络线功率波动较大的问题,对电网并不友好;若综合考虑购电费用和联络线波动性,虽加氢站购电费用小幅提升,但联络线功率波动性明显改善,对电网更友好。以目前的电-氢相互转换效率,两个方案中氢燃料电池都未参与考虑峰谷电价差的电量平移,也不参与联络线功率的平滑作用。

The hydrogen production system based on grid-connected wind power can meet the stable hydrogena-tion demand of hydrogen refueling stations.Therefore,it is necessary to study the optimal operation of hydro-gen refueling stations based on grid-connected wind power.An electricity-hydrogen coupling model considering constraints such as power balance constraints,hydrogen capacity constraints,and zero wind curtailment of wind turbines was established.Two schemes are adopted to set objective function respectively.The improved parti-cle swarm algorithm is used to solve the above model.The results of an example show that the proposed algo-rithm has good convergence.Only considering the minimum electricity purchase cost of the hydrogen refueling station,the power of the connecting line between the hydrogen refueling station and the power grid fluctuates greatly,which is not friendly to the power grid.Comprehensively considering the electricity purchase cost and the connecting line volatility,the electricity purchase cost of the hydrogen refueling station is slightly increased,but the connecting line power fluctuation is significantly improved,which is more friendly to the power grid.With the current electricity-hydrogen mutual conversion efficiency,the hydrogen fuel cells in the two schemes do not participate in the electric quantity shift considering the peak-to-valley electricity price difference,nor do they participate in the smoothing effect of the connecting line power.