The turbine governor mainly functions in:

The primary function of a turbine governor is to control turbine speed. This is crucial because maintaining optimal speed ensures that the turbine operates efficiently and safely. The governor achieves this by continuously monitoring the turbine's rotational speed and adjusting the input—typically the fuel flow or steam flow—to keep the speed within the desired operating range.

When the turbine speed deviates from its set point, the governor makes real-time adjustments. For instance, if the speed increases beyond the set point, the governor reduces the fuel or steam supply, thereby slowing down the turbine. Conversely, if the speed decreases, it may increase the supply to bring it back to the desired level. This automatic regulation helps prevent damage to the turbine and maintains a stable power output.

Although adjusting fuel flow and regulating steam flow are important for the operation of a turbine, these actions are typically carried out as part of the governor's overall task of controlling speed. Cooling turbine components is also important in managing the health and efficiency of the turbine, but it is not the primary function of the governor.