ISO New England strives to keep all stakeholders informed about conditions on the region’s power system. Here are explanations of different notifications you may see in the power system status report or in the Seven-Day Capacity Forecast.
Conditions are considered normal when electricity supply is sufficient to meet expected demand plus required operating reserves.
A Master/Local Control Center Procedure No. 2 (M/LCC 2) alert is issued either for the entire region or for a local area to notify power system personnel and wholesale electricity market participants when abnormal conditions on the region’s power system exist or are anticipated. M/LCC 2 is not a request for conservation.
The ISO implements ISO Operating Procedure No. 4: Action During a Capacity Deficiency (OP 4) when available resources are insufficient to meet anticipated electricity demand plus required operating reserves.
OP 4 is an implicit part of the reliability design of the power grid in New England. It was envisioned that instances would occur when required operating reserves could not be maintained and that appropriate contingency measures needed to be in place.
Action 1, Power Caution: This is an advisory that available capacity resources are insufficient to meet anticipated demand plus operating reserve requirements, and ISO New England has implemented OP 4. This is not a request for electricity conservation.
Action 2 ISO New England is declaring an Energy Emergency Alert (EEA) Level 1.
Action 3 ISO New England has requested voluntary load curtailment of market participants’ facilities in New England.
Action 4, Power Watch: This is a public advisory that high demand for electricity in the region has created the need to conserve electricity. Voluntary electricity conservation by the public is requested. The public can conserve electricity at home and at work by turning off unnecessary lights, equipment, and appliances, and minimizing the use of air conditioning. People who require air conditioning and other electrical appliances for health and safety reasons should not restrict their use.
A follow-up notification is issued once the Power Watch has been lifted.
Action 5 ISO New England is arranging to purchase available emergency capacity and energy, or energy only, (if capacity backing is not available) from market participants or neighboring regions. Control Area to Control Area transactions will normally be used as a last resort, when market-based emergency energy transactions are not available, or not available in a timely fashion.
Action 6 Local Control Centers (LCCs) are implementing a voltage reduction of 5% of normal operating voltage requiring more than 10 minutes to implement. ISO New England is declaring an EEA Level 2 which also applies to Actions 8, 10, and 11. ISO New England is alerting the New York Independent System Operator that sharing of reserves within Northeast Power Coordinating Council may be required. ISO New England is counting load shed capability available as part of OP-7 to meet its Disturbance Control Standard requirements.
Action 7 ISO New England has requested generators not subject to a capacity supply obligation to voluntarily provide energy for reliability purposes.
Action 8 ISO New England and LCCs are implementing a voltage reduction of 5% of normal operating voltage that is attainable within 10 minutes.
Action 9 LCCs are requesting all of the customer generation not contractually available to market participants and voluntary load curtailment by large industrial and commercial customers.
Action 10, Power Warning: This is a public notification that immediate reduction in power usage is needed to help protect the region’s electricity system. The public is urged to reduce electricity use immediately. The public can conserve electricity at home and at work by turning off unnecessary lights, equipment, and appliances, and minimizing the use of air conditioning. People who require air conditioning and other electrical appliances for health and safety reasons should not restrict their use.
A follow-up notification is issued once the Power Warning has been lifted.
Action 11 ISO New England has requested each New England state governor reinforce Power Warning appeals, as initiated in Action 10.
ISO New England declares a Minimum Generation Emergency (CROP.25005) for one of the following reasons:
As part of its Seven-Day Capacity Forecast, the ISO issues these alerts to notify wholesale electricity market participants and government regulators, including both utility and air regulators, when the combination of forecasted cold weather conditions and anticipated capacity outlook could impact reliable operation of New England’s power system. They are not requests for public conservation.
For details, see SOP-RTMKTS.0050.0007: Perform Cold Weather Condition Operations.
This means the ISO is forecasting an Energy Emergency (SOP-RTMKTS.0120.0025) in the Seven-Day Capacity Forecast. The Energy Emergency is declared when the ISO forecasts a shortage of fuel for generators resulting in a potential loss of operable generating capacity needed to meet requirements for system demand for electricity and ten-minute operating reserves.