Why do hydro-electric generators typically exhibit better governor response than thermal generators?

Hydro-electric generators exhibit better governor response largely due to the nature of their operation and the physical attributes of water as a power source. The correct choice highlights that hydro-electric generators have significant amounts of stored energy in the form of potential energy in reservoirs. This stored energy allows for rapid adjustments in power output in response to frequency variations in the grid.

The governor of a hydro-electric generator can quickly manipulate the flow of water through the turbines. Since water can be controlled and released immediately, hydro-electric generators can react faster compared to thermal generators, which rely on combustion processes to generate steam and drive turbines. The thermal inertia involved in heating water to produce steam introduces a delay in response time, making it less agile in frequency regulation.

While it's true that thermal generators do often carry spinning reserve, this does not translate to a faster response in governor function. Additionally, while water's conductive properties are important in electrical contexts, they don’t relate to the speed of governor response. Advanced governors can enhance performance in hydro-electric systems, but this is not the main reason for their superior response capabilities. The stored energy and the direct control of water flow fundamentally contribute to the quicker adjustment mechanisms inherent in hydro-electric systems.