The invention discloses a method for controlling off-peak power generation through linkage of three gas cabinets. A
blast furnace gas cabinet, a first converter cabinet and a second converter cabinet operate in a grid-connected mode. In the
electricity price valley period, the supply amount of
blast furnace gas and converter gas is increased, the
blast furnace gas usage amount of a
gas generator set is reduced, outsourcing low-price
electricity is increased, and meanwhile surplus
blast furnace gas and converter gas are stored; and in the
electricity price peak period, the supply amount of
blast furnace gas and converter gas is reduced, the
blast furnace gas usage amount of the
gas generator set is increased, the external electricity purchase amount is increased, and the stored gas is increased and conveyed to the
gas generator set for consumption so as to reduce the cabinet capacity. In the
electricity price valley period and the
electricity price peak period,
coal gas is allocated through linkage among the blast furnace
gas cabinet, the first converter cabinet, the second converter cabinet, the gas generator set and the production user, peak shifting power generation is achieved based on the change of the cabinet capacity, the
electric energy time value is fully excavated, and the
coal gas power generation benefit is improved.