The test study on optimization of sliding pressure operation mode for three 600 MW units has been presented

the variation of main characteristic parameters under sliding pressure operation carried out through adopting different open-degree of the steam-governing valve for units being compared and analysed.the control curves under sliding pressure operation with bettter operating efficiency having been determined.After revising

the new control curves make the workdone in high-pressure cylinder to be improved

and make the coal consumption rate for supplied power from the units to be lowered.