System Operating Limit [SOL]

The value (such as MW, Mvar, amperes, frequency or volts) that satisfies the most limiting of the prescribed operating criteria for a specified system configuration to ensure operation within acceptable reliability criteria. System Operating Limits are based upon certain operating criteria. These include, but are not limited to:
Facility Ratings (applicable pre- and post-Contingency Equipment Ratings or Facility Ratings)
• transient stability ratings (applicable pre- and post- Contingency stability limits)
• voltage stability ratings (applicable pre- and post-Contingency voltage stability)
• system voltage limits (applicable pre- and post-Contingency voltage limits)