We’ve already noted ‘The curious case of a frequency spike (outside of the NOFB) on Friday 10th April 2026’, with the key bits being:
1) ‘The highest point was (at 50.174Hz) was at 10:30:41.5 NEM time on Friday 10th April 2026’ and
2) ‘the excursion was focused in the 10:30 (excursion) and 10:35 (recovery) dispatch intervals’.
Curious, then, that we see 8 x Market Notices (each in pairs) relating to Non-Conformances at 4 different Semi-Scheduled wind farms, all relating to the same Dispatch Intervals!
Elaine Wind Farm (ELAINWF1)
In chronological order in which the messages started arriving, we start with Elaine Wind Farm, as follows:
| First there was … this Market Notice |
Then (~2 hours later) there was … this Market Notice |
|---|---|
|
At 12:26:53 (NEM time) the AEMO published MN140990 as follows. ——————————————————————- From : AEMO ——————————————————————- Notice ID : 140990 ——————————————————————- Reason : AEMO ELECTRICITY MARKET NOTICE AEMO has declared the following unit as non-conforming under clause 3.8.23 of the National Electricity Rules: Manager NEM Real Time Operations ——————————————————————-
|
Then there was (at 14:12:10 NEM time) MN 140996 as follows: ——————————————————————- From : AEMO ——————————————————————- Notice ID : 140996 ——————————————————————- Reason : AEMO ELECTRICITY MARKET NOTICE Update – Refer to market notice 140990 AEMO has declared the following unit as non-conforming under clause 3.8.23 of the National Electricity Rules: Manager NEM Real Time Operations ——————————————————————-
|
Golden Plains Wind Farm East 1 (GPWFEST1)
Then there was Golden Plains Wind Farm as follows:
| First there was … this Market Notice |
Then (~2 hours later) there was … this Market Notice |
|---|---|
|
At 12:27:34 (NEM time) the AEMO published MN140992 as follows. ——————————————————————- From : AEMO ——————————————————————- Notice ID : 140992 ——————————————————————- Reason : AEMO ELECTRICITY MARKET NOTICE AEMO has declared the following unit as non-conforming under clause 3.8.23 of the National Electricity Rules: Manager NEM Real Time Operations ——————————————————————-
|
Then there was (at 14:12:18 NEM time) MN 140997 as follows: ——————————————————————- From : AEMO ——————————————————————- Notice ID : 140997 ——————————————————————- Reason : AEMO ELECTRICITY MARKET NOTICE Update – refer to market notice 104992 AEMO has declared the following unit as non-conforming under clause 3.8.23 of the National Electricity Rules: Manager NEM Real Time Operations ——————————————————————-
|
Golden Plains Wind Farm East 2 (GPWFEST2)
Then there was Golden Plains Wind Farm East 2 as follows:
| First there was … this Market Notice |
Then (~2 hours later) there was … this Market Notice |
|---|---|
|
At 12:27:45 (NEM time) the AEMO published MN140993 as follows. ——————————————————————- From : AEMO ——————————————————————- Notice ID : 140993 ——————————————————————- Reason : AEMO ELECTRICITY MARKET NOTICE AEMO has declared the following unit as non-conforming under clause 3.8.23 of the National Electricity Rules: Manager NEM Real Time Operations ——————————————————————-
|
Then there was (at 14:12:29 NEM time) MN 140998 as follows: ——————————————————————- From : AEMO ——————————————————————- Notice ID : 140998 ——————————————————————- Reason : AEMO ELECTRICITY MARKET NOTICE Update – Refer market notice 140993 AEMO has declared the following unit as non-conforming under clause 3.8.23 of the National Electricity Rules: Manager NEM Real Time Operations ——————————————————————- |
Ryan Corner Wind Farm (RYANCWF1)
Lastly there was Ryan Corner Wind Farm as follows:
| First there was … this Market Notice |
Then (~2 hours later) there was … this Market Notice |
|---|---|
|
At 12:28:46 (NEM time) the AEMO published MN140994 as follows. ——————————————————————- From : AEMO ——————————————————————- Notice ID : 140994 ——————————————————————- Reason : AEMO ELECTRICITY MARKET NOTICE AEMO has declared the following unit as non-conforming under clause 3.8.23 of the National Electricity Rules: Manager NEM Real Time Operations ——————————————————————-
|
Then there was (at 14:12:31 NEM time) MN 140999 as follows: ——————————————————————- From : AEMO ——————————————————————- Notice ID : 140999 ——————————————————————- Reason : AEMO ELECTRICITY MARKET NOTICE Update – refer market notice 140994 AEMO has declared the following unit as non-conforming under clause 3.8.23 of the National Electricity Rules: Manager NEM Real Time Operations ——————————————————————- |
On the WattClarity Glossary we have been progressively adding details to this page about ‘Conformance Status’.
1) especially in the context of these 8 x Market Notices:
(a) Keep in mind that a positive number for Dispatch Error (and Raw Off-Target) represents under-performance relative to Target;
(b) And noted that the frequency spike that happens just before the 10:35 and 10:40 dispatch intervals, it would be useful reading.
2) More to come, in subsequent articles!
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