What type of generation usually does not count towards a Balancing Authority's contingency reserve?

The distinction regarding what types of generation typically do not count toward a Balancing Authority's contingency reserve is essential in understanding how resource planning and reliability are managed in electric power systems. Static VAR generators, which are used primarily for reactive power support, do not generate active power or assist in meeting the real power demands during emergencies or contingencies. Their primary function is to help maintain voltage stability and improve power quality, not to provide a source of energy that can be called upon during a generation shortfall.

In contrast, load shedding is deliberately reducing load to maintain system reliability during emergencies, while reliable generation refers to power sources that can be counted on to produce energy when needed. Interruptible load represents contracts where customers agree to reduce their consumption during peak times or contingencies, which can provide necessary reserves.

Since static VAR generators do not produce active power, they are not considered a resource that can effectively respond to contingency events in the same way that the other types of options could. Thus, they do not contribute to a Balancing Authority's contingency reserve requirements despite their importance for overall system stability.