Steam injection into the exhaust gas recirculation line of a gas and steam turbine power plant

A power plant comprising:

• a gas turbine, and
• a heat recovery steam generator connected downstream of the gas turbine in the direction of flow of an exhaust gas,
• wherein the heat recovery steam generator comprises heating surfaces of a high-pressure section, of a medium-pressure section and of a low-pressure section,
• wherein an exhaust gas recirculation line branches off from the heat recovery steam generator downstream of an evaporator of the high-pressure section in the direction of flow of an exhaust gas and opens into the heat recovery steam generator again upstream of the heating surfaces,
• wherein a blower is arranged in the exhaust gas recirculation line,
• wherein a steam feed branches off from a boiler water expansion tank and opens into the exhaust gas recirculation line downstream of the blower in the direction of flow of a recirculated exhaust gas, and,
• wherein an exhaust gas diverter is configured to divert the exhaust gas away from or into the heath recovery steam generator, wherein a mouth of the exhaust gas recirculation line opens upstream of the exhaust gas diverter and downstream of the gas turbine.