SHORT-TERM TRANSMISSION OUTAGE REQUESTS. A. MINIMUM ADVANCE NOTICE TIME - RESPONSE TIME FOR SHORT-TERM TRANSMISSION OUTAGES Outages of transmission facilities may require extensive study and coordination, first by the LCC to assess local area reliability and perform rudimentary congestion analysis and then by ISO to assess bulk power system reliability and perform warranted detailed congestion analysis. Operating policies at the LCCs define minimum advance notice times for the submittal of Short-Term Transmission Outage requests from the TOs to the LCCs. These notice times are critical and designed to provide the LCCs with enough time to assess TO Short-Term Transmission Outage requests before denying them or forwarding them to ISO for further analysis and ultimate approval. Similarly, ISO needs enough time to assess the Short-Term Transmission Outage requests and deny or approve them. Furthermore, Approved outages must be known in time for use in the settlement of the Day Ahead Markets (DAMs), and TOs must know in time to coordinate final steps to arrange equipment and manpower needed to do the work. To provide adequate time for this analysis and coordination, application advance notice times, and ISO response times, have been established. Transmission Facilities
