This paper investigates the warm-up and drainage configuration methods in the steam source pipeline of small turbine steam driven feed water pumps in ultra supercritical units,analyzes the problems existing in the current steam source switching process of small turbine steam driven feed water pump,and addresses these issues by upgrading the heating method for the standby steam source.The renovation significantly enhanced the safety and rapidity of steam source switching,avoiding unit tripping caused by steam source switching and improving the reliability of unit operation.
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