Abstract: The national power plant, the unit 3, with a high load stage after starting the grid, has appeared the phenomenon of the unit overheating, the main rethermal steam temperature anomaly, the actual pressure of the main steam and the target pressure frequently deviate, seriously affecting the safe operation of the unit. This paper analyzes the parameters of the start-up stage of the unit, the operation operation and the selection of boiler overheating, and gives the suggestions and preventive measures to improve the stability and safety of the unit operation.
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