Steam turbine main control auxiliary system and unit coordination control system

The utility model discloses a steam turbine main control auxiliary system and a unit coordination control system, which relate to the field of coal-fired thermal power unit control, and judge the deviation between a manual control instruction and a main valve instruction through a first difference judgment module respectively connected with a manual control instruction input end and a main valve instruction end; the situation that the deviation between a manual set value and a master valve instruction value of a coal-fired thermal power generating unit is too large due to the problems of keyboard abnormity, input errors and the like is avoided, and a first selection module connected with a first difference value judgment module is arranged between a manual control instruction input end and a master valve instruction end; the process that a steam turbine master control system executes manual instruction input of an operator is limited, a series of abnormal conditions such as unit load oscillation, valve rapid