Example of how a Variable Energy Resource (VER) is modeled in the 15-minute RTUC FMMs

FERC Order 764 Compliance 15-Minute Scheduling and Settlement

Version 1.0

January 21, 2014

RTUC run #1 is executed at 8:52.5. The RTUC study horizon is

Interval number / Start Time / End Time
1 / 9:15 / 9:30
2 / 9:30 / 9:45
3 / 9:45 / 10:00
4 / 10:00 / 10:15
5 / 10:15 / 10:30
6 / 10:30 / 10:45
7 / 10:45 / 11:00

Interval #2 is the binding interval and interval #3, -#7 are advisory intervals.

A VER resource has a MF Pmin = 0 and Pmax = 120MW. Its bid curve is -$10 from 0 to 100MW for both HE 10 and HE11. Its Self-Schedule for HE 10 and HE 11 is 100MW. It submits its VER 5-minute forecast every 5-minute on a rolling basis and wants to use its own forecast. Assume that the latest VER forecast submitted in SIBR before 8:52.5 RTUC run is

Forecast Interval number / Start Time / End Time / VER forecast MW
1 / 9:15 / 9:20 / 60
2 / 9:20 / 9:25 / 70
3 / 9:25 / 9:30 / 80
4 / 9:30 / 9:35 / 65
5 / 9:35 / 9:40 / 75
6 / 9:40 / 9:45 / 85
7 / 9:45 / 9:50 / 60
8 / 9:50 / 9:55 / 70
9 / 9:55 / 10:00 / 80
10 / 10:00 / 10:05 / 65
11 / 10:05 / 10:10 / 75
12 / 10:10 / 10:15 / 85
13 / 10:15 / 10:20 / 60
14 / 10:20 / 10:25 / 70
15 / 10:25 / 10:30 / 80
16 / 10:30 / 10:35 / 65
17 / 10:35 / 10:40 / 75
18 / 10:40 / 10:45 / 85
19 / 10:45 / 10:50 / 60
20 / 10:50 / 10:55 / 70
21 / 10:55 / 11:00 / 80

For each 15-mintue RTUC market interval, RTUC will calculate the simple average of 3 5-minute VER forecasts within the interval to get the 15-minute VER forecast. So

Interval number / Start Time / End Time / VER Forecast
1 / 9:15 / 9:30 / 70
2 / 9:30 / 9:45 / 75
3 / 9:45 / 10:00 / 70
4 / 10:00 / 10:15 / 75
5 / 10:15 / 10:30 / 70
6 / 10:30 / 10:45 / 75
7 / 10:45 / 11:00 / 70

RTUC will use the 5-minute VER Forecast as the resource capacity limit. Its bid curve is curtailed by the forecast

Interval number / Start Time / End Time / MW range / Bid Price
1 / 9:15 / 9:30 / 0 to 70 / -10
2 / 9:30 / 9:45 / 0 to 75 / -10
3 / 9:45 / 10:00 / 0 t0 70 / -10
4 / 10:00 / 10:15 / 0 to 75 / -10
5 / 10:15 / 10:30 / 0 to 70 / -10
6 / 10:30 / 10:45 / 0 t0 75 / -10
7 / 10:45 / 11:00 / 0 to70 / -10

Its Self-Schedule is also curtailed

Interval number / Start Time / End Time / Self-Schedule
1 / 9:15 / 9:30 / 70
2 / 9:30 / 9:45 / 75
3 / 9:45 / 10:00 / 70
4 / 10:00 / 10:15 / 75
5 / 10:15 / 10:30 / 70
6 / 10:30 / 10:45 / 75
7 / 10:45 / 11:00 / 70

Assume that VER’s LMP is way above its bid price of -10$/MWh, VER is awarded at its VER forecast at each 15-minute forecast

Interval number / Start Time / End Time / MW award / Binding/Advisory
1 / 9:15 / 9:30 / 70
2 / 9:30 / 9:45 / 75 / B
3 / 9:45 / 10:00 / 70 / A
4 / 10:00 / 10:15 / 75 / A
5 / 10:15 / 10:30 / 70 / A
6 / 10:30 / 10:45 / 75 / A
7 / 10:45 / 11:00 / 70 / A

CMRI will post the MW award and VER forecast at each binding/advisory 15-minute interval.

The next RTUC run #2 executed at 9:07.5. The RTUC study horizon is

Interval number / Start Time / End Time
1 / 9:30 / 9:45
2 / 9:45 / 10:00
3 / 10:00 / 10:15
4 / 10:15 / 10:30
5 / 10:30 / 10:45
6 / 10:45 / 11:00

Assume that the latest VER forecast submitted in SIBR before 9:07.5 RTUC run is

Forecast Interval number / Start Time / End Time / VER forecast MW
1 / 9:30 / 9:35 / 110
2 / 9:35 / 9:40 / 110
3 / 9:40 / 9:45 / 110
4 / 9:45 / 9:50 / 110
5 / 9:50 / 9:55 / 110
6 / 9:55 / 10:00 / 110
7 / 10:00 / 10:05 / 110
8 / 10:05 / 10:10 / 110
9 / 10:10 / 10:15 / 110
10 / 10:15 / 10:20 / 110
11 / 10:20 / 10:25 / 110
12 / 10:25 / 10:30 / 110
13 / 10:30 / 10:35 / 110
14 / 10:35 / 10:40 / 110
15 / 10:40 / 10:45 / 110
16 / 10:45 / 10:50 / 110
17 / 10:50 / 10:55 / 110
18 / 10:55 / 11:00 / 110

In this case, the VER’s bid and self-schedule will be extended to 110 for HE 10 and HE11.

Assume that VER’s LMP is way above its bid price of -10$/MWh, VER is awarded at its VER forecast at each 15-minute interval

Interval number / Start Time / End Time / MW award / Binding/Advisory
1 / 9:30 / 9:45 / 110
2 / 9:45 / 10:00 / 110 / B
3 / 10:00 / 10:15 / 110 / A
4 / 10:15 / 10:30 / 110 / A
5 / 10:30 / 10:45 / 110 / A
6 / 10:45 / 11:00 / 110 / A

The next RTUC run #3 executed at 9:22.5. The RTUC study horizon is

Interval number / Start Time / End Time
1 / 9:45 / 10:00
2 / 10:00 / 10:15
3 / 10:15 / 10:30
4 / 10:30 / 10:45
5 / 10:45 / 11:00

Assume all of sudden the wind is not blowing anymore and the latest VER forecast submitted in SIBR before 9:22.5 RTUC run is

Forecast Interval number / Start Time / End Time / VER forecast MW
1 / 9:45 / 9:50 / 0
2 / 9:50 / 9:55 / 0
3 / 9:55 / 10:00 / 0
4 / 10:00 / 10:05 / 0
5 / 10:05 / 10:10 / 0
6 / 10:10 / 10:15 / 0
7 / 10:15 / 10:20 / 0
8 / 10:20 / 10:25 / 0
9 / 10:25 / 10:30 / 0
10 / 10:30 / 10:35 / 0
11 / 10:35 / 10:40 / 0
12 / 10:40 / 10:45 / 0
13 / 10:45 / 10:50 / 0
14 / 10:50 / 10:55 / 0
15 / 10:55 / 11:00 / 0

In this case, the VER’s bid and self-schedule will be cut to zero for HE 10 and HE11. The RTUC solution is

Interval number / Start Time / End Time / MW award / Binding/Advisory
1 / 9:45 / 10:00 / 0
2 / 10:00 / 10:15 / 0 / B
3 / 10:15 / 10:30 / 0 / A
4 / 10:30 / 10:45 / 0 / A
5 / 10:45 / 11:00 / 0 / A