FERC Order 764 15 minute Scheduling

FERC Order 764 Topics Implementation timeline FERC Requirements WECC Requirements Impacts PS, RT, ATF WIT Displays

FERC Order 764 November 12, 2013 implemented 15 minute scheduling FERC Order 764

FERC Order 764 15 minute Scheduling Intra-hour scheduling intervals: WECC scheduling intervals shall be defined as: xx:00 – xx:15, xx:15-xx:30, xx:30-xx:45, and xx:45- xx:00. Intra-hour profiling on a Request for Interchange (e-Tag) shall be in intervals with start and stop times of: xx:00, xx:15, xx:30, and xx:45. Schedules will be allowed in 15 minute, 30 minute, 45 minute, 1-hour or longer blocks provided the start and stop times are as above. (For example, a customer may have an e-Tag that starts at xx:15 and ends at xx:00, for a 45 minute e-Tag.) The exception to this rule is the start/stop time for curtailed and re- loaded e-Tags which are determined by reliability related reasons.

FERC Order 764 15 minute Scheduling Requests for Interchange submitted within the hour will allow the use of firm or non-firm Transmission Service Reservations, and Network Integration Transmission Service rights, including but not limited to the use of Point-to-Point Redirect reservations, Point-to-Point Resale reservations, or Original reservations. The FERC order allows intra-hour scheduling to all transmission customers taking service under the OATT.

FERC Order 764 15 minute Scheduling Requests for Interchange submitted within the hour will allow the use of new or existing Transmission Service Reservations. The FERC order did not mandate that a customer only use transmission rights purchased prior to the hour, and also did not mandate that TSPs allow for the acquisition of transmission rights within the hour. The recommendation allows a customer to purchase transmission service during the hour if there is Available Transfer Capability.

FERC Order 764 15 minute Scheduling Preemption of Requests for Interchange (e-Tags): e-Tags utilizing firm transmission capacity would preempt an e-Tag utilizing non-firm transmission capacity if the e-Tag was submitted at least 20 minutes before the impacted scheduling interval. E-Tags utilizing non-firm transmission capacity with a higher OATT transmission priority would preempt e-Tags utilizing a lower OATT transmission priority non-firm transmission capacity if the e-Tag was submitted at least 20 minutes before the impacted scheduling interval. This recommendation eliminates the “no bumping” rule that many WECC Transmission Providers currently have in Business Practices.

FERC Order 764 15 minute Scheduling Requests for Interchange Timing: A Request for Interchange (e- Tag) must be submitted at least 20 minutes prior to the start of the impacted WECC scheduling interval to be considered “On Time.” A request submitted less than 20 minutes prior to the impacted WECC scheduling interval is considered “Late” and will be marked “Late” by the Interchange Authority. “Late” e-Tags may be accepted at the discretion of the Transmission Service Provider. The current NERC INT Standards and companion NAESB Standards include Timing Tables that define when Requests for Interchange must be submitted to obtain an “On Time” classification by the Interchange Authority.

FERC Order 764 15 minute Scheduling Intra-hour scheduling profiles submitted in Pre- Schedule: Requests for Interchange submitted in the Pre-Schedule horizon may be submitted using the WECC intra-hour scheduling intervals. This is at the customer’s discretion and is not required.

FERC Order 764 15 minute Scheduling Curtailments: If needed, Reliability Limits (curtailments) will occur prior to the top of the hour (as they do today) for all scheduling intervals in the upcoming hour that exceed a path scheduling limit, and Reliability Limits (curtailments/reloads) will occur within the hour as needed.

FERC Order 764 15 minute Scheduling ATC Calculation: At a minimum, ATC will continue to be calculated as Transmission Service Providers currently calculate today. Order 764 neither requires Transmission Service Providers to provide an intra-hour transmission product nor requires more frequent calculations of ATC than what occurs today.

FERC Order 764 15 minute Scheduling However, FERC did not preclude a Transmission Service Provider from offering a sub-hourly product if it chooses. Transmission Providers should note that 15-minute scheduling may require more frequent calculation of their hourly transmission than the minimum current requirements due to schedules adjusted or transmission sold during the hour potentially impacting ATC on the path.

FERC Order 764 15 minute Scheduling Ramp Rates: The top of the hour ramp will remain 20 minutes. Ramp duration for the intra-hour scheduling intervals will be a 10-minute straddle ramp. There was concern in the Task Force that if volume is heavy and there is a large NSI change for the intra-hour intervals, a 10-minute ramp may not be sufficient time to fully ramp in expected values. It is recommended that a re-evaluation of the ramp duration be performed approximately 6 months after the implementation of 15-minute scheduling (or at such time as there is sufficient intra-hour scheduling volume to create a data sample set) to ensure the ramp rates are appropriately set.

FERC Order 764 15 minute Scheduling Net Scheduled Interchange Accounting and Sub- Hourly Schedule Integration: Net Scheduled Interchange will remain as it is today, integrating to an hourly value at the end of each hour. Schedules with duration of less than 1 hour will integrate using currently defined rounding rules per NAESB WEQ- 004-19.1. Explain the problem with (4) 50mw 15 minute schedule. 50mw x 15 min = 12.5 mw current rounding 13mw 4 x 13mw = 52mw on 50mw of transmission The problem is known and we will have to see what impacts are created This is due to 60 min hour rounding for sub-hourly schedules

FERC Order 764 15 minute Scheduling Coordinated Checkouts of Balancing Authorities: The Task Force recommends that Balancing Authority Checkouts should occur for Net Scheduled Interchange values as reflected below: The WIT currently supports sub-hourly checkouts show them webScheduler also supports sub-hourly checks outs Show the class the MWH selection feature on Interchange Summary in WIT and web Scheduler Show the class the AGC minute files

Net Schedule Interchange FERC Order 764 Net Schedule Interchange Horizon Value Check Out Preschedule – 15:00 PPT Hourly MW Integrated Value Always check out Real Time Before-the-Hour Hourly MW Integrated Value and non-integrated MW Values for each scheduling interval within the hour. Only upon a value change Real Time Intra-Hour XX:00-XX:15 Non-integrated MW Value Real Time Intra-Hour XX:15-XX:30 Real Time Intra-Hour XX:30-XX:45 Real Time Intra-Hour XX:45-XX:00 Real Time Reliability Curtailments Hourly Integrated Value Check after Hour Completes Real Time After-the-Hour – Hrly NSI After-the-Fact – Hourly NSI

FERC Order 764 15 minute Scheduling The Net Scheduled Interchange value being checked out before and after the hour is the integrated hourly MW value we use today. The Net Scheduled Interchange value being checked out for the individual intra-hour scheduling intervals will be a non-integrated 15-minute MW value. This is to ensure the adjacent BAs are driving to the same NSI value for each schedule interval as required by NERC standards.

FERC Order 764 15 minute Scheduling ATF checking of Net Actual Interchange remains unchanged, conducted on the Hourly MW Value.

FERC Order 764 15 minute Scheduling Inter-hour schedules totals received by WALC BA November 2013 39 December 2013 20 January 2014 12 February 2014 34 March 2014 47 April 2014 36

FERC Order 764 Questions