STEAM TURBINE CONTROL SYSTEM AND STEAM TURBINE OPERATION MODE AT HIGH UNSTEADY EXHAUST PRESSURE

摘要

FIELD: power industry.;SUBSTANCE: invention relates to power engineering. The control system intended for implementation of logical algorithm of safety in unsteady mode for the purpose of prevention of automatic shutdown of the turbine by the exhaust pressure caused by pressure jump at the turbine exhaust caused by sharp decrease of flow rate through the turbine in connection with sudden pressure boost at the turbine exhaust. When conditions of full load dropping are detected by means of a mismatch of 50 load by power and confirmed by auxiliaries, the normal mode settings of automatic shutdown by pressure at the turbine exhaust are blocked for a delay period while transitional operating tolerances are active. The steam turbine operation method according to the invention is also presented.;EFFECT: invention allows to provide safe functioning of steam turbines in unsteady operating mode.;10 cl, 5 dwg