Settlement Interval Times
Half-Hourly Settlement Interval Periods
The half-hourly settlement process divides each day into 48 equal intervals, each lasting 30 minutes. These intervals are used in energy markets to measure and settle energy consumption or generation at specific points throughout the day.
Below is an example breakdown of half-hourly intervals:
| Start Time (HH) | End Time (HH) | Interval Time (HH) |
|---|---|---|
| 00:00 | 00:30 | 1 |
| 00:30 | 01:00 | 2 |
| 01:00 | 01:30 | 3 |
| 01:30 | 02:00 | 4 |
| 02:00 | 02:30 | 5 |
| 02:30 | 03:00 | 6 |
| 03:00 | 03:30 | 7 |
| 03:30 | 04:00 | 8 |
| 04:00 | 04:30 | 9 |
| 04:30 | 05:00 | 10 |
| 05:00 | 05:30 | 11 |
| 05:30 | 06:00 | 12 |
| 06:00 | 06:30 | 13 |
| 06:30 | 07:00 | 14 |
| 07:00 | 07:30 | 15 |
| 07:30 | 08:00 | 16 |
| 08:00 | 08:30 | 17 |
| 08:30 | 09:00 | 18 |
| 09:00 | 09:30 | 19 |
| 09:30 | 10:00 | 20 |
| 10:00 | 10:30 | 21 |
| 10:30 | 11:00 | 22 |
| 11:00 | 11:30 | 23 |
| 11:30 | 12:00 | 24 |
| 12:00 | 12:30 | 25 |
| 12:30 | 13:00 | 26 |
| 13:00 | 13:30 | 27 |
| 13:30 | 14:00 | 28 |
| 14:00 | 14:30 | 29 |
| 14:30 | 15:00 | 30 |
| 15:00 | 15:30 | 31 |
| 15:30 | 16:00 | 32 |
| 16:00 | 16:30 | 33 |
| 16:30 | 17:00 | 34 |
| 17:00 | 17:30 | 35 |
| 17:30 | 18:00 | 36 |
| 18:00 | 18:30 | 37 |
| 18:30 | 19:00 | 38 |
| 19:00 | 19:30 | 39 |
| 19:30 | 20:00 | 40 |
| 20:00 | 20:30 | 41 |
| 20:30 | 21:00 | 42 |
| 21:00 | 21:30 | 43 |
| 21:30 | 22:00 | 44 |
| 22:00 | 22:30 | 45 |
| 22:30 | 23:00 | 46 |
| 23:00 | 23:30 | 47 |
| 23:30 | 00:00 | 48 |
Quarterly-Hourly Settlement Interval Periods
In the United States, the energy market uses quarterly hourly settlement intervals to manage and settle energy consumption and generation. This system divides each hour into four 15-minute intervals, resulting in a total of 96 intervals per day.
Below is an example breakdown of quarterly-hourly intervals:
| Start Time (QH) | End Time (QH) | Interval Time (QH) |
|---|---|---|
| 00:00 | 00:15 | 1 |
| 00:15 | 00:30 | 2 |
| 00:30 | 00:45 | 3 |
| 00:45 | 01:00 | 4 |
| 01:00 | 01:15 | 5 |
| 01:15 | 01:30 | 6 |
| 01:30 | 01:45 | 7 |
| 01:45 | 02:00 | 8 |
| 02:00 | 02:15 | 9 |
| 02:15 | 02:30 | 10 |
| 02:30 | 02:45 | 11 |
| 02:45 | 03:00 | 12 |
| 03:00 | 03:15 | 13 |
| 03:15 | 03:30 | 14 |
| 03:30 | 03:45 | 15 |
| 03:45 | 04:00 | 16 |
| 04:00 | 04:15 | 17 |
| 04:15 | 04:30 | 18 |
| 04:30 | 04:45 | 19 |
| 04:45 | 05:00 | 20 |
| 05:00 | 05:15 | 21 |
| 05:15 | 05:30 | 22 |
| 05:30 | 05:45 | 23 |
| 05:45 | 06:00 | 24 |
| 06:00 | 06:15 | 25 |
| 06:15 | 06:30 | 26 |
| 06:30 | 06:45 | 27 |
| 06:45 | 07:00 | 28 |
| 07:00 | 07:15 | 29 |
| 07:15 | 07:30 | 30 |
| 07:30 | 07:45 | 31 |
| 07:45 | 08:00 | 32 |
| 08:00 | 08:15 | 33 |
| 08:15 | 08:30 | 34 |
| 08:30 | 08:45 | 35 |
| 08:45 | 09:00 | 36 |
| 09:00 | 09:15 | 37 |
| 09:15 | 09:30 | 38 |
| 09:30 | 09:45 | 39 |
| 09:45 | 10:00 | 40 |
| 10:00 | 10:15 | 41 |
| 10:15 | 10:30 | 42 |
| 10:30 | 10:45 | 43 |
| 10:45 | 11:00 | 44 |
| 11:00 | 11:15 | 45 |
| 11:15 | 11:30 | 46 |
| 11:30 | 11:45 | 47 |
| 11:45 | 12:00 | 48 |
| 12:00 | 12:15 | 49 |
| 12:15 | 12:30 | 50 |
| 12:30 | 12:45 | 51 |
| 12:45 | 13:00 | 52 |
| 13:00 | 13:15 | 53 |
| 13:15 | 13:30 | 54 |
| 13:30 | 13:45 | 55 |
| 13:45 | 14:00 | 56 |
| 14:00 | 14:15 | 57 |
| 14:15 | 14:30 | 58 |
| 14:30 | 14:45 | 59 |
| 14:45 | 15:00 | 60 |
| 15:00 | 15:15 | 61 |
| 15:15 | 15:30 | 62 |
| 15:30 | 15:45 | 63 |
| 15:45 | 16:00 | 64 |
| 16:00 | 16:15 | 65 |
| 16:15 | 16:30 | 66 |
| 16:30 | 16:45 | 67 |
| 16:45 | 17:00 | 68 |
| 17:00 | 17:15 | 69 |
| 17:15 | 17:30 | 70 |
| 17:30 | 17:45 | 71 |
| 17:45 | 18:00 | 72 |
| 18:00 | 18:15 | 73 |
| 18:15 | 18:30 | 74 |
| 18:30 | 18:45 | 75 |
| 18:45 | 19:00 | 76 |
| 19:00 | 19:15 | 77 |
| 19:15 | 19:30 | 78 |
| 19:30 | 19:45 | 79 |
| 19:45 | 20:00 | 80 |
| 20:00 | 20:15 | 81 |
| 20:15 | 20:30 | 82 |
| 20:30 | 20:45 | 83 |
| 20:45 | 21:00 | 84 |
| 21:00 | 21:15 | 85 |
| 21:15 | 21:30 | 86 |
| 21:30 | 21:45 | 87 |
| 21:45 | 22:00 | 88 |
| 22:00 | 22:15 | 89 |
| 22:15 | 22:30 | 90 |
| 22:30 | 22:45 | 91 |
| 22:45 | 23:00 | 92 |
| 23:00 | 23:15 | 93 |
| 23:15 | 23:30 | 94 |
| 23:30 | 23:45 | 95 |
| 23:45 | 00:00 | 96 |
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