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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.

For more information

If you have queries about any information on this page, please contact Ben Blake.

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.  

The NEM Constraint Report Summary Data 2018
24 June 2019 (234 KB, xlsx)
The NEM Constraint Report Summary Data 2017
11 July 2018 (212 KB, xlsx)
The NEM Constraint Report 2016
01 June 2017 (1.76 MB, pdf)
The NEM Constraint Report 2016 Supplementary Data
10 July 2018 (201 KB, xlsx)
The NEM Constraint Report 2015
23 May 2016 (1.76 MB, pdf)
The NEM Constraint Report 2015 Supplementary Data
23 May 2016 (189 KB, xlsx)
The NEM Constraint Report 2014
2 Apr 2015 (1.3 MB, pdf)
The NEM Constraint Report 2014 Supplementary Data
2 Apr 2015 (264 KB, xlsx)
The NEM Constraint Report 2013
29 Apr 2014 (1.7 MB, pdf)
The NEM Constraint Report 2013 Supplementary Data
29 Apr 2014 (156 KB, xlsx)
The NEM Constraint Report 2012 Version 2
11 Jun 2013 (5.0 MB, pdf)
The NEM Constraint Report 2011
16 Feb 2012 (4.31 MB, pdf)
The NEM Constraint Report 2010
16 Feb 2012 (2.39 MB, pdf)
The Constraint Report 2009
15 Feb 2010 (1.41 MB, pdf)
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.

Monthly Constraint Report - December 2019
15 January 2020 (662 KB, pdf) 
Monthly Constraint Report - November 2019
06 December 2019 (657 KB, pdf) 
Monthly Constraint Report - October 2019
06 December 2019 (670 KB, pdf) 
Monthly Constraint Report - September 2019
07 October 2019 (657 KB, pdf) 
Monthly Constraint Report - August 2019
23 September 2019 (603 KB, pdf) 
Monthly Constraint Report - July 2019
20 August 2019 (658 KB, pdf) 
Monthly Constraint Report - June 2019
24 July 2019 (649 KB, pdf) 
Monthly Constraint Report - May 2019
19 June 2019 (652 KB, pdf)
Monthly Constraint Report - April 2019
24 May 2019 (642 KB, pdf)
Monthly Constraint Report - March 2019
16 April 2019 (669 KB, pdf)
Monthly Constraint Report - February 2019
25 March 2019 (661 KB, pdf)
Monthly Constraint Report - January 2019
26 February 2019 (651 KB, pdf)
Monthly Constraint Report - December 2018
07 January 2019 (1.2 MB, pdf)
Monthly Constraint Report - November 2018
10 December 2018 (831 KB, pdf)
Monthly Constraint Report - October 2018
27 November 2018 (829 KB, pdf)
Monthly Constraint Report - September 2018
24 October 2018 (847 KB, pdf)
Monthly Constraint Report - August 2018
03 October 2018 (844 KB, pdf)
Monthly Constraint Report - July 2018
27 August 2018 (711 KB, pdf)
Monthly Constraint Report - June 2018
10 July 2018 (726 KB, pdf)
Monthly Constraint Report - May 2018
27 June 2018 (729 KB, pdf)
Monthly Constraint Report - April 2018
14 May 2018 (843 KB, pdf)
Monthly Constraint Report - March 2018
06 April 2018 (840 KB, pdf)
Monthly Constraint Report - February 2018
09 March 2018 (844 KB, pdf)
Monthly Constraint Report - January 2018
05 March 2018 (845 KB, pdf)
Monthly Constraint Report - December 2017
08 January 2018 (838 KB, pdf)
Monthly Constraint Report - November 2017
11 December 2017 (851 KB, pdf)
Monthly Constraint Report - October  2017
16 October 2017 (840 KB, pdf)
Monthly Constraint Report - September  2017
27 October 2017 (840 KB, pdf)
Monthly Constraint Report - August 2017
20 September 2017 (839 KB, pdf)
Monthly Constraint Report - July 2017
23 August 2017 (837 KB, pdf)
Monthly Constraint Report - June 2017
26 July 2017 (834 KB, pdf)
Monthly Constraint Report - May 2017
21 June 2017 (852 KB, pdf)
Monthly Constraint Report - April 2017
08 May 2017 (985 KB, pdf)
Monthly Constraint Report - March 2017
07 April 2017 (976 KB, pdf)
Monthly Constraint Report - February 2017
15 March 2017 (991 KB, pdf) 
Monthly Constraint Report - January 2017
07 February 2017 (853 KB, pdf) 
Monthly Constraint Report - December 2016
25 January 2017 (863 KB, pdf) 
Monthly Constraint Report - November 2016
28 December 2016 (860 KB, pdf)
Monthly Constraint Report - October 2016
14 November 2016 (869 KB, pdf)
Monthly Constraint Report - September 2016
26 October 2016 (861 KB, pdf)
Monthly Constraint Report - August 2016
12 September 2016 (842 KB, pdf)
Monthly Constraint Report - July 2016
29 August 2016 (867 KB, pdf)
Monthly Constraint Report - June 2016
12 July 2016 (845 KB, pdf)
Monthly Constraint Report - May 2016
17 June 2016 (840 KB, pdf)
Monthly Constraint Report - April 2016
18 May 2016 (840 KB, pdf)
Monthly Constraint Report - March 2016
21 April 2016 (854 KB, pdf)
Monthly Constraint Report - February 2016
09 March 2016 (923 KB, pdf)
Monthly Constraint Report - January 2016
21 April 2016 (851 KB, pdf)
Monthly Constraint Report - December 2015
20 January 2016 (847 KB, pdf)
Monthly Constraint Report - November 2015
8 December 2015 (844 KB, pdf)
Monthly Constraint Report - October 2015
8 December 2015 (844 KB, pdf)
Monthly Constraint Report - September 2015
8 October 2015 (844 KB, pdf)
Monthly Constraint Report - August 2015
3 September 2015 (844 KB, pdf)
Monthly Constraint Report - July 2015
6 August 2015 (844 KB, pdf)
Monthly Constraint Report - June 2015
9 July 2015 (844 KB, pdf)
Monthly Constraint Report - May 2015
10 June 2015 (844 KB, pdf)
Monthly Constraint Report - April 2015
13 May 2015 (844 KB, pdf)
Monthly Constraint Report - March 2015
13 April 2015 (844 KB, pdf)
Monthly Constraint Report - February 2015
23 March 2015 (843 KB, pdf)
Monthly Constraint Report - January 2015
10 February 2015 (843 KB, pdf)
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.

The current Constraint Library Change Report (xls) is updated on the first business day of the week.

Archive:

Visit the archive of previous Weekly Constraint Reports.

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.


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