How does rpm of steam turbine change with time?

The RPM of a steam turbine typically changes over time in response to variations in load demand and steam supply. During startup, the RPM gradually increases as steam pressure builds and the turbine accelerates. Under stable operating conditions, the RPM remains relatively constant, but it can fluctuate due to changes in load, steam flow, or operational adjustments. If the load decreases, the RPM may drop, while an increase in load can cause the RPM to rise, depending on the control mechanisms in place.