System Conditions

  NYISO System States

Normal State

  Alerts

  Notices

  • Reserve Pick-up

    Not In Effect



  • Thunderstorm Alert

    Not In Effect

  

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Definitions of terms used:

System State:  This provides the general state of NYISO system condition which can be Normal, Alert or Major Emergency.
Reference: Emergency Operations section 1.2.1

Normal State:  The condition that the NYS Power System is in when the Transmission Facilities Under ISO Operational Control are operated within the parameters listed for Normal State in the Reliability Rules.
Reference: Tariffs

Alert State:  The Alert State exists when conditions on the NYS Power System are more severe than in the Warning State.
Reference: Emergency Operations section 2.1

Major Emergency State:  An Emergency accompanied by abnormal frequency, abnormal voltage and/or equipment overloads that create a serious risk that the reliability of the NYS Power System could be adversely affected.
Reference: Tariffs

Thunder Storm Alert:  Thunderstorm Watch (New York City) - when actual or anticipated severe weather conditions under which region-specific portions of the NYS Transmission System are operated in a more conservative manner by reducing transmission transfer limits.
Reference: Tariffs section for Storm Watch
NYSRC Reliability Rules section IR-4

Reserve Pick-Up:  The NYISO may enter this RTD-CAM mode when necessary to re-establish schedules if the ACE is greater than 100 MW.
Reference: Transmission and Dispatching Operations section 6.2.1