Restart manner and restart of the uniaxial combined plant

摘要

PROBLEM TO BE SOLVED: To provide a method and a device for restarting a uniaxial combined plant capable of being restarted after the lapse of a short time after an emergency stop.;SOLUTION: In this method, a steam turbine is rotated by introducing starting steam having a temperature lower than an exhaust temperature of a gas turbine into the steam turbine after stopping the uniaxial combined plant connected with the steam turbine and the gas turbine to one axis, the gas turbine is rotated by a rotational force of the steam turbine, the rotating speed of the steam turbine is raised up to ignition rotating speed for igniting the gas turbine and the gas turbine is ignited. The raising and lowering of the rotating speed of the steam turbine are repeated in a rotating speed range equal to or lower the ignition rotating speed by introducing the starting steam until a temperature difference between a staring steam temperature and a metal temperature of the steam turbine is within a prescribed value. After the temperature difference is set within the prescribed value, the rotating speed of the steam turbine is raised up to the ignition rotating speed by the starting steam to ignite the gas turbine.;COPYRIGHT: (C)2010,JPO&INPIT