What is the primary objective of maintaining an isochronous governor?

The primary objective of maintaining an isochronous governor is to keep frequency constant under load variations. An isochronous governor is a type of speed governor that ensures the generator runs at a constant speed regardless of changes in load. In a power system, if the load increases or decreases, maintaining system frequency is crucial for the stability and reliability of the electrical grid.

When the load changes, the governor adjusts the fuel or energy input to the generator to respond to those changes, thereby stabilizing the frequency. This regulation is vital for preventing system disturbances, such as frequency drops or spikes, which can lead to operational issues or even blackouts.

Other options, while relevant to power generation and system performance, do not directly express the core functionality of an isochronous governor. Maintaining maximum energy yield is important but is secondary to the necessity of frequency control. Automating system diagnostics and reducing infrastructure costs are beneficial but are not the primary function of governor systems.