What is the primary role of a voltage regulator in a substation?

The primary role of a voltage regulator in a substation is to maintain a constant output voltage level. Voltage regulators are essential for ensuring the stability and reliability of the electrical supply. They automatically adjust the output voltage in response to fluctuations in the load or input voltage, ensuring that the voltage delivered to the distribution network remains within specified limits. This is crucial for protecting both equipment and consumers from the damages caused by overvoltage or undervoltage scenarios.

Maintaining a consistent voltage level helps prevent disruptions in service and prolongs the lifespan of electrical devices. In some cases, voltage regulators may also help manage the system's overall power quality by reducing voltage flicker and harmonics, but their primary function remains centered around output voltage stabilization.