Which voltage level is commonly used to reference the size of reactive power resources?

The commonly referenced voltage level for sizing reactive power resources is 230 kV. This specific voltage level is often used as a standard in planning and operational processes pertaining to reactive power because it strikes a balance between the higher transmission voltages and lower distribution voltages.

At the 230 kV level, utility operators can more easily manage reactive power flow across a wider area while also ensuring sufficient capacity to support local load demands. The 230 kV voltage level is significant in the electric grid's operation since it typically allows for more extensive transmission of electricity with lower losses compared to lower voltage levels.

Moreover, reactive power resources, such as synchronous condensers or capacitors, are critical at this voltage level to maintain voltage stability and ensure system reliability as they help compensate for the inductive loads prevalent in electric systems. Thus, operators tend to prefer this level for active discussions and resource planning regarding reactive power management.