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)
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.
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.
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.