The invention belongs to the technical field of thermoelectricity, and relates to a
cogeneration set for combining a steam-driven
heat pump with a heat storage device and a peak regulation method for the
cogeneration set. The
cogeneration set comprises a
steam turbine, the steam-driven
heat pump and the heat storage device basically, and is used for
peak load regulation. By combining the steam-driven
heat pump with the heat storage device, switching between a heat storage mode and a heat release mode is conducted according to the requirement on power generation dispatching of a thermal power
plant, and the purpose that the grid power generation of the thermal power
plant is changed when
heat supply is ensured is achieved; and the steam
exhaust heat is recovered through a condenser and an
evaporator of the steam-driven heat pump, so that the
heat supply cost of the thermal power
plant is reduced. According to the cogeneration set, the
peak load regulation range of the thermal power plant is expanded, the
power regulation range of the
power grid is further expanded, more grid power
generation time is provided for
renewable energy sources, such as
wind power, and the problems such as wind curtailment are finally solved; and the external heating capacity of the thermal power plant of which the heating capacity is limited can be improved with the recovered steam
exhaust heat. The cogeneration set is suitable for participating in
peak load regulation.