To increase MVAR output from a generator, what parameter is adjusted?

The adjustment of the excitation system of a generator is pivotal for increasing the MVAR (megavolt-ampere reactive) output. The excitation system provides the necessary DC current to the rotor windings of a synchronous generator, which influences the magnetic field strength and, consequently, the reactive power output.

When the excitation is increased, the magnetic field strength rises, allowing the generator to produce more reactive power. This adjustment directly impacts the voltage output of the generator, enabling it to better respond to fluctuations in load and maintain voltage stability within the power system.

While power factor, load, and voltage level do play significant roles in the operation of a generator, it is the excitation that specifically controls and enhances the MVAR output, which is crucial for managing reactive power in power systems, ensuring efficient voltage regulation, and supporting the overall stability of the grid.