Thermal power plant and control method for thermal power plant

Abstract

A thermal power plant, which includes: a boiler; a steam turbine driven by steam from the boiler; a turbine bypass line bypassing the steam turbine to supply steam; a condenser for cooling exhaust steam of the steam turbine to produce condensate water; a low-pressure feed water heater for heating the condensate water with extraction steam from the steam turbine; and a deaerator for deaerating the condensate water with the extraction steam, includes: a hot water heater for producing hot water from the condensate water fed from the condenser, by using main steam of the turbine bypass line as a heat source; a hot water tank for storing the hot water; and a hot water pump for feeding the hot water stored in the hot water tank to a downstream flow of the low-pressure feed water heater or to the deaerator