Abstract: The steam water separation reheater system of a certain M310 unit is equipped with a dedicated microcomputer controller to automatically control the pressure of the steam heated by the secondary reheater during the start-up and shutdown of the steam turbine. During the turbine speed increase period, the controller automatically controls the amount of steam entering the secondary reheater heating tube bundle to ensure that the reheated steam entering the intermediate pressure cylinder does not contain any moisture. After synchronous grid connection and load increase to about 5% of the rated load, the controller sets the secondary reheater pressure setting value according to the turbine load. Then, by increasing the flow of fresh steam entering each steam water separation reheater, the heating steam pressure of the secondary reheater gradually increases according to the power level until it reaches the steam parameters during normal operation. This article briefly introduces the pressure logic of the GSS system.