Statistical reporting streams
The CIR contains continuous reporting streams that provide stakeholders with information on constraints and resulting network congestion that are updated regularly. The CIR is also a portal to resources providing details on particular incidents.
Annual NEM Constraint Report
AEMO uses constraint equations to model power system congestion in the National Electricity Market dispatch engine (NEMDE) and projected assessment of system adequacy (PASA). Constraint equations can have an impact on pricing and dispatch in the electricity market. AEMO publishes this summary spreadsheet annually to provide market participants with information about the changing congestion patterns over the previous five years.
This report details constraint equation performance and transmission congestion related issues for each calendar year.
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18/04/2024
NEM Constraint Report 2023 summary data
351.26 KB -
24/05/2023
NEM Constraint Report 2022 summary data.
379.34 KB -
17/03/2022
NEM Constraint Report 2021 summary data
343.26 KB -
24/03/2021
NEM Constraint Report 2020 summary data
312.71 KB -
26/08/2020
NEM Constraint Report 2019 summary data
273.15 KB -
24/06/2019
NEM Constraint Report 2018 summary data
233.89 KB -
11/07/2018
NEM Constraint Report 2017 summary data
215.77 KB -
08/06/2017
NEM Constraint Report 2016
1.65 MB -
10/07/2018
NEM Constraint Report 2016 supplementary data
200.18 KB -
29/06/2020
NEM Constraint Report 2015
1.45 MB
Monthly Constraint Report
The monthly constraint report details constraint equation performance and transmission congestion related issues for each month. It includes investigations of violating constraint equations, usage of the constraint automation and performance of pre-dispatch constraint equations. Transmission and generation changes are also detailed along with the number of constraint equation changes made by constraint builders.
This report has been developed in response to a submission to the congestion information resource (CIR) consultation. AEMO welcomes comments and suggestions on the content of this report from both internal AEMO staff and participants.
Note: Historical reports can be made available on request.
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2024
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20/09/2024
Monthly Constraint Report - August 2024
855.63 KB -
02/09/2024
Monthly Constraint Report - July 2024
780.6 KB -
30/07/2024
Monthly Constraint Report - June 2024
705.04 KB -
01/07/2024
Monthly Constraint Report - May 2024
695.66 KB -
14/05/2024
Monthly Constraint Report - April 2024
692.38 KB -
19/04/2024
Monthly Constraint Report - March 2024
843.11 KB -
28/03/2024
Monthly Constraint Report - February 2024
701.96 KB -
26/02/2024
Monthly Constraint Report January 2024
694.14 KB
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2023
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23/01/2024
Monthly Constraint Report December 2023
726.09 KB -
18/12/2023
Monthly Constraint Report November 2023
724.23 KB -
24/11/2023
Monthly Constraint Report October 2023
728.29 KB -
13/10/2023
Monthly Constraint Report September 2023
730.55 KB -
14/09/2023
Monthly Constraint Report August 2023
720.34 KB -
14/08/2023
Monthly Constraint Report July 2023
727.2 KB -
11/07/2023
Monthly Constraint Report June 2023
724.82 KB -
27/06/2023
Monthly Constraint Report May 2023
720.05 KB -
16/05/2023
Monthly Constraint Report April 2023
727.88 KB -
18/04/2023
Monthly Constraint Report March 2023
721.47 KB -
11/04/2023
Monthly Constraint Report February 2023
722.08 KB -
11/04/2023
Monthly Constraint Report January 2023
716.43 KB
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2022
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17/01/2023
Monthly Constraint Report December 2022
737.88 KB -
19/12/2022
Monthly Constraint Report November 2022
742.24 KB -
28/11/2022
Monthly Constraint Report October 2022
748.59 KB -
19/10/2022
Monthly Constraint Report September 2022
747.65 KB -
14/09/2022
Monthly Constraint Report August 2022
751.81 KB -
05/09/2022
Monthly Constraint Report July 2022
741.69 KB -
18/07/2022
Monthly Constraint Report June 2022
731.5 KB -
15/06/2022
Monthly Constraint Report - May 2022
742.46 KB -
16/05/2022
Monthly Constraint Report - April 2022
740.65 KB -
13/04/2022
Monthly Constraint Report - March 2022
742.73 KB -
16/03/2022
Monthly Constraint Report - February 2022
743.08 KB -
11/02/2022
Monthly Constraint Report - January 2022
738.4 KB
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2021
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17/01/2022
Monthly Constraint Report - December 2021
651.66 KB -
06/12/2021
Monthly Constraint Report - November 2021
658.29 KB -
05/11/2021
Monthly Constraint Report - October 2021
661 KB -
25/10/2021
Monthly Constraint Report - September 2021
658.51 KB -
29/09/2021
Monthly Constraint Report - August 2021
651.7 KB -
27/08/2021
Monthly Constraint Report - July 2021
655.45 KB -
21/07/2021
Monthly Constraint Report - June 2021
654.29 KB -
28/06/2021
Monthly Constraint Report - May 2021
649.77 KB -
26/05/2021
Monthly Constraint Report - April 2021
661.21 KB -
22/04/2021
Monthly Constraint Report - March 2021
651.58 KB -
26/03/2021
Monthly Constraint Report - February 2021
648.77 KB -
23/02/2021
Monthly Constraint Report - January 2021
652.52 KB
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2020
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20/01/2021
Monthly Constraint Report - December 2020
647.34 KB -
24/12/2020
Monthly Constraint Report - November 2020
656.54 KB -
18/11/2020
Monthly Constraint Report - October 2020
657.58 KB -
14/10/2020
Monthly Constraint Report - September 2020
654.12 KB -
29/09/2020
Monthly Constraint Report - August 2020
659.56 KB -
14/09/2020
Monthly Constraint Report - July 2020
655.57 KB -
14/09/2020
Monthly Constraint Report - June 2020
653.13 KB -
29/06/2020
Monthly Constraint Report - May 2020
654.81 KB -
08/05/2020
Monthly Constraint Report - April 2020
643.45 KB -
17/04/2020
Monthly Constraint Report - March 2020
650.54 KB -
10/03/2020
Monthly Constraint Report - February 2020
653.06 KB -
10/03/2020
Monthly Constraint Report - January 2020
657.25 KB
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2019
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15/01/2020
Monthly Constraint Report - December 2019
661.63 KB -
06/12/2019
Monthly Constraint Report - November 2019
657.11 KB -
06/12/2019
Monthly Constraint Report - October 2019
669.4 KB -
07/10/2019
Monthly Constraint Report - September 2019
657.8 KB -
23/09/2019
Monthly Constraint Report - August 2019
603.53 KB -
20/08/2019
Monthly Constraint Report - July 2019
657.64 KB -
24/07/2019
Monthly Constraint Report - June 2019
648.99 KB -
19/06/2019
Monthly Constraint Report - May 2019
651.73 KB -
24/05/2019
Monthly Constraint Report - April 2019
641.19 KB -
16/04/2019
Monthly Constraint Report - March 2019
653.07 KB -
25/03/2019
Monthly Constraint Report - February 2019
645.62 KB -
26/02/2019
Monthly Constraint Report - January 2019
650.56 KB
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2018
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07/01/2019
Monthly Constraint Report - December 2018
1.15 MB -
10/12/2018
Monthly Constraint Report - November 2018
830.14 KB -
27/11/2018
Monthly Constraint Report - October 2018
828.21 KB -
24/10/2018
Monthly Constraint Report - September 2018
846.44 KB -
03/10/2018
Monthly Constraint Report - August 2018
843.92 KB -
27/08/2018
Monthly Constraint Report - July 2018
710.72 KB -
10/07/2018
Monthly Constraint Report - June 2018
725.26 KB -
27/06/2018
Monthly Constraint Report - May 2018
728.45 KB -
14/05/2018
Monthly Constraint Report - April 2018
842.27 KB -
06/04/2018
Monthly Constraint Report - March 2018
839.63 KB -
09/03/2018
Monthly Constraint Report - February 2018
843.46 KB -
05/03/2018
Monthly Constraint Report - January 2018
844.11 KB
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NEM Weekly Constraint Library Changes Report
AEMO publishes a weekly summary of the constraint equations, sets and functions that have been added, modified or removed from the constraint library.
Please note that the Effective Date indicates the new/updated constraint is available from that date, it may not necessarily be invoked until a later time.