Effect of voltage on fixed capacitor

[3winding]

What effect does changing the voltage have on a fixed capacitor? Lets say a substation has a 10MVAR capacitor rated at 34.5kV. If the system voltage goes up or down, how does the MVAR output change?

 

[Skogsgurra]

As voltage squared. But losses will also increase at higher voltage. Do not exceed rated voltage.

 

[3winding]

Okay, so if the voltage rises to 37kV what is the output of the caps?

 

[Skogsgurra]

The 10 Mvar (yes, small letters in var, it is a unit of its own) rises to 11.5 Mvar.