The present application relates to
renewable energy consumption and
hydrogen energy storage and supply technology, and aims to provide a
hydrogen synthesis storage and supply
system and method for fluctuation
smoothing and spontaneous power generation. The method comprises: using a compressor unit and a hierarchical
energy storage device to replace a storage battery, replacing the charging and discharging process of the traditional battery technology by a
hydrogen storage-hydrogen use process; controlling the operation number of the self-compressor unit according to the remaining available power after
photovoltaic power generation and
hydrogen production, and switching the hydrogen source according to the operation state of the pressure potential
recovery power generation unit; using the relatively low power operation of the compressor unit and the inter-stage air supplement-
high pressure storage strategy to improve the photovoltaic
utilization rate under the non-rated power full-stage operation condition; and recovering the pressure potential in the
hydrogen storage container to generate power, thereby achieving the power supplement of the
chemical production device. The present application can greatly reduce the maintenance cost, has no electrochemical decay and
thermal runaway risk, significantly improves the photovoltaic
utilization rate in the whole life cycle, does not involve
chemical conversion, and has very high efficiency.