Abstract: The necessity of hydrogen production by using valley electricity is introduced, and the economy is analyzed. The hydrogen generation unit can be used to adjust the power grid load according to the demand, to improve the deployment capacity of renewable energy, to guarantee the national energy security, and to effectively reduce carbon dioxide emission. The hydrogen can be used for hydrogen energy storage, fuel gas by injection of natural gas, oil product refining or steelmaking, and fuel cell vehicles, etc., which can bring economic benefits from hydrogen production using valley electricity. It is suggested that more efforts should be put to increase the research and development investment of low-cost and high-energy efficiency electrolyzer, to carry out the relevant research on pipeline hydrogen transportation, and to carry out the research on the application scheme of renewable energy hydrogen production in refining and chemical enterprises.

Key words: renewable energy, renewable power, energy storage, hydrogen production using valley power