What is the role of governor in hydro-power plant?

The governor in a hydro-power plant is a crucial device that regulates the turbine's speed and ensures stable power output. It automatically adjusts the flow of water to the turbines based on the demand for electricity and the load on the system, maintaining optimal performance and preventing overspeed conditions. By responding to changes in electrical demand, the governor helps maintain grid stability and enhances the overall efficiency of the power generation process.