The controlling effects of automatic regulating systems in heat power engineering for home-made supercritical 600 MW units aren't properly good in operation. On the basis of analysing the structure and features of the automatic regulating systems

and through methods

such as bring reasonable front feed into said systems

adopting proper simplification

and selecting more suitable regulating objects etc.

the optimization of control for main automatic regulating systems

e.i. the coordinated control system

as well as combustion system and feed-water system for boilers adopting direct feed coal-pulverizing system equipped with double-inlet and double-outlet mills

has been carried out. The practical application shows that the regulating systems after optimization can satisfy the control requirements of units.