If a generator raises its VAR output, what should the system operator expect to happen to system voltage?

When a generator raises its VAR (volt-ampere reactive) output, the system operator should expect the system voltage to increase. This is because VARs are associated with reactive power, which is necessary for maintaining and regulating voltage levels in the electrical system.

When a generator injects additional reactive power into the grid by increasing its VAR output, it provides support for the voltage at its connection point and throughout the surrounding network. Higher reactive power levels can help raise the local voltage, counteracting any voltage drops that may occur due to power flows or other system dynamics.

Therefore, an increase in VAR output typically leads to an increase in the system voltage, ensuring better voltage stability and reliability of the entire electrical grid. This is crucial for maintaining efficient operation of the system and preventing voltage-related issues that can impact the reliability of power supply.