氢能在使用过程中只有水产生，是一种优秀的二次能源，但其环保性应考虑制氢所用的一次能源以及运输等环节，利用电网无法消纳的弃光电解水制绿氢并掺入天然气中，利用天然气管网输送，可保证氢能的环保清洁。建立了一种考虑质子交换膜（proton exchange membrane, PEM）电解槽启停特性的优化运行模型，该模型在处理间歇性能源、氢气需求量波动和时变电价时能够得到最优生产计划，实现时变电价、氢气生产、光伏出力和运行成本四者的平衡；生产计划显示不同时段电解槽负载，验证了模型的正确性。通过改变约束条件中的最低负载，结果表明，待机和空闲状态的比例随着最低负载的降低而降低，运行成本随之也有小幅度减小，当到达临界值6.1%后，运行成本不再发生变化。

Hydrogen, which produces only water during usage, is an excellent secondary energy source. However, its environmental impact should consider the primary energy sources used for hydrogen production, as well as transportation. The use of the grid can not absorb the abandoned photoelectrolysis water to produce green hydrogen and incorporate it into natural gas, and the use of natural gas pipeline network transportation can ensure the environmental protection and clean hydrogen energy. An optimal operation model considering the start-stop characteristics of proton exchange membrane (PEM) electrolytic cell was established. The model can obtain the optimal production plan when dealing with intermittent energy, hydrogen demand fluctuation and time-varying electricity price, and achieve the balance of time-varying electricity price, hydrogen production, photovoltaic output and operating cost. The production plan shows the load of electrolyzer in different periods, which verifies the correctness of the model. By changing the minimum load in the constraint condition, the results show that the proportion of standby and idle state decreases with the decrease of the minimum load, and the running cost also decreases slightly. When the critical value reaches 6.1%, the running cost no longer changes.