STEAM TURBINE OPERATION
S team turbines are started based on operating instructions which is developed by original equipment manufacturer. Start-up includes a sequence of actions followed as according to various parameters. During start-up of turbine maintaining the limit values of operating parameters. Start-up of turbine is a complicated operation as it consists of starting of various equipment and auxiliary systems. Turbine start up is a transient & non-stationary actions like, Transient heating Varying steam flows Acceleration of rotors Three basic phases can be distinguished in the process of steam t urbine unit Turbine preparation to start-up, Running-up to idle run and synchronization, Loading. o Turbine to start-up begins with turning gear or barring gear. o The turning gear operated by electric (electric turning gear) or hydraulic (hydraulic turning gear) o Before start up of turbine it is thermally stablished o its deflection line must coincide with the gravity deflec