Research on Steam Bypass Pressure Control of Gas-Steam Combined Cycle Generator Units
The purpose of the study on steam bypass pressure control strategy is to achieve fully automatic control and steam pressure protection of the steam bypass system during the startup,shutdown,boiler parallel and backflow processes of the unit,as well as during load shedding or tripping of the unit.Based on the com-missioning and optimization of the steam bypass system of two units in a foreign gas-steam combined cycle power plant,several pressure control methods and control problems in the steam bypass during the startup,shutdown,and operation of the unit are analyzed.The aim is to provide assistance for the configuration or sys-tem optimization of the bypass control system of the same or similar type of generator unit,and to provide a ref-erence for the design of the bypass control strategy of the steam turbine generator unit with intermediate re-heating and steam header system.
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