Pricing Manifest Errors
Affected Period
Status
Closed
Category
Balancing
Run type
Created
27/09/2019 13:16
Last Updated
27/09/2019 13:18
Dear
Market Participants,
SEMO
have identified that two manifest errors have recently occurred.
Details of the manifest errors is as
follows:
1.
Incorrect application of LOCL/CRLO
Instruction.
The
LOCL instruction is intermittently not being applied after a CRLO has been
issued. The result is that the QBOA is not calculated for the impacted units,
resulting in impact to Imbalance Price. This issue is logged as ID 6021 in the
Known Issues Report. There were multiple occurrences of this issue throughout
Saturday the 21st of September.
2.
Units not being flagged on upward slope of reserve curve,
despite reserve constraint binding
A
small subset of units have a unique reserve curve whereby they have both a
positive slope at the beginning of the curve and a negative slope at the end of
the curve. If reserve is binding all units with a non-zero slope should be
flagged. The positive slope is not being flagged correctly. If the unit is on a
positive slope and the constraint is binding the unit will not be flagged and
may contribute to the price as a result. Note, this defect is only present on
four units. The impacted periods are as follows:
|
Imbalance
Settlement periods (GMT) |
|
20/09/2019
11:00 |
|
21/09/2019
12:00 |
|
21/09/2019
16:00 |
|
22/09/2019
07:30 |
|
22/09/2019
10:30 |
|
22/09/2019
11:00 |
|
22/09/2019
13:30 |
|
22/09/2019
14:30 |
|
23/09/2019
00:00 |
|
23/09/2019
07:00 |
|
23/09/2019
07:30 |
|
23/09/2019
08:00 |
|
23/09/2019
09:30 |
|
23/09/2019
10:00 |
|
23/09/2019
14:00 |
|
23/09/2019
14:30 |
|
23/09/2019
20:00 |
|
25/09/2019
11:30 |
|
25/09/2019
15:00 |
|
26/09/2019
02:00 |
|
26/09/2019
02:30 |
|
26/09/2019
09:30 |
|
26/09/2019
12:00 |
|
26/09/2019
12:30 |
|
26/09/2019
19:30 |
|
26/09/2019
20:00 |
SEMO
will observe occurrences of these manifest
errors in the future and where possible,
amend as part of the repricing project.
Kind regards,
SEMO
Trading Operations