Secondary reheating boiler reheating steam temperature control method based on flue gas baffle adjustment

The invention discloses a secondary reheating boiler reheating steam temperature control method based on flue gas baffle adjustment, and the method is characterized in that a tail flue of a secondary reheating boiler is divided into three mutually independent and parallel flues, namely a primary low reheating flue, a secondary low reheating flue and a low passing flue; a primary low-reheat flue baffle is arranged at an outlet of the primary low-reheat flue, a secondary low-reheat flue baffle is arranged at an outlet of the secondary low-reheat flue, and a low-passing flue gas baffle is arranged at an outlet of the low-passing flue. According to the method, the opening degrees of the three baffles are decoupled, so that each baffle opening degree only corresponds to one target value, independent variables and dependent variables are mapped one by one, the operation difficulty of a control system is reduced, and the response and convergence speed of the control system is increased. 本发明公开了一种基于烟气挡板调节的二次再热锅炉再热汽温控制