System for reheat steam temperature turndown control in heat recovery steam generators

A power generation system comprising:

• a gas turbine configured to generate power, and expel exhaust gases through an exhaust;
• and,
• a heat recovery steam generator having a gas inlet in communication with the exhaust of the gas turbine, the heat recovery steam generator comprising:
• a high-temperature section including a first reheater coupled in a parallel orientation with at least one high-pressure superheater, the first reheater separated from the at least one superheater by at least one barrier wall;
• an evaporator coupled downstream from the high-temperature section, the evaporator configured to extract heat from gases exiting the high-temperature section;
• and,
• a damper system upstream from the evaporator, the damper system configured to divert gas exiting from an outlet of the first reheater and the outlet of the at least one superheater.