The Grid Conditions dashboard has two displays: Operating Reserves and Daily PRC. The Operating Reserves meter shows the current state of grid conditions as well as the amount of operating reserves. The Daily PRC graph shows both recent and current Physical Responsive Capability (PRC), which is the total amount of frequency responsive Resource capability On-Line in Real-Time.
The Grid Conditions meter displays the current state of ERCOT grid conditions.
Green = The grid is operating under normal conditions.
Yellow = Energy conservation is requested.
Orange (Energy Emergency Level 1) = Emergency operations have begun due to low power reserves, but there are no controlled outages at this time. Energy conservation is requested.
Red (Energy Emergency Level 2) = The emergency level has been raised due to continued low power reserves. Energy conservation is requested. It is advised to create a plan in case controlled outages are needed later. Those with critical medical needs should register with their local utility and have a backup plan.
Black (Energy Emergency Level 3) = The highest level of emergency operations. Local electric utilities have been instructed to begin controlled outages. Health and safety should be made a priority by using city or county instructions and resources. Energy conservation is critical.
The Daily PRC graph shows the amount of operating reserves that represent Physical Responsive Capability (PRC), which includes the generation and load resources that are available to respond quickly to system events in case of sudden changes, such as an unexpected outage at a large generating unit. Reserves help ERCOT maintain system frequency at 60 Hz, the industry standard.