Based on the control difficulties in the operation process of the unit after the bypass heating alteration

a complete control strategy was proposed under the bypass heating condition

which realizes the bypass automatic control under the heating condition and meets the needs of the unit heating regulation at the same time. Aiming at the influence of bypass switching on and off and working condition disturbance on the operation stability of steam turbine under the heating condition

as well as the change of unit safety boundary

a set of logic design scheme including bypass blocking and overriding was proposed

which effectively guarantees the unit's safety and stability. Aiming at the changing characteristics of the steam turbine flow characteristics and the boiler's response to temperature and pressure characteristics in the state of bypass heating

an optimization strategy for coordination correction was proposed

which improved the quality of network-related control of the unit. The control scheme proposed in this paper has been applied in the supercritical once-through furnace unit. It has been verified the control strategy can realize the automatic control of the bypass system

and the control effect of the coordinated variable load is good. After the bypass RB acts

the unit can transition smoothly

realizing the bypass supply Automatic and safe control of the unit under thermal conditions.