AEPC_2025_08 IMS Interface – Network Operator and AEMO AEPC_2025_09 Network Modelling Data and AEPC_2025_10 Communications and Control Systems

The Consultation Process

The consultation process is outlined below. Dates are indicative only and subject to change.

Procedure Change Proposal

Electricity System and Market Rules – Clause 2.10

Date of Notice: 30 May 2025

Matter under Consultation

AEMO has commenced the Procedure Change Process to amend three related WEM Procedures. The amendments include moving the relevant contents of the IMS Interface – Network Operator Procedure into the Network Modelling Data and Communications and Control Systems WEM Procedures. The IMS Interface – Network Operator Procedure will be retired on conclusion of this Procedure Change Process.

Proposed changes to the Network Modelling Data WEM Procedure include:

• Clarifying what technical information and data the Network Operator is to provide to AEMO to support Power System Modelling, power system studies, and related matters.
• Updating the processes associated with information or data provision by the Network Operator, including the format, form, timing and manner of information and data provision.
• The addition of a process by which AEMO may request updated or further information or data, and related processes to enable AEMO and the Network Operator to agree on an alternative timeframe or manner of information or data provision.
• Clarification of the process for (the Network Operator’s) access to a shared location, as one means of providing the required information or data.
• A summary table on the information and data requirements to assist the Network Operator’s understanding of its obligations.

Proposed changes to the Communications and Control Systems WEM Procedure include incorporating relevant requirements from the WEM Procedure: IMS Interface – Network Operators in relation to Real-time SCADA data, Historical SCADA data, SCADA control and Operational telephones.

Content from the IMS Interface – Network Operators Procedure, which is not incorporated into either the Network Modelling Data or the Communications and Control Systems WEM Procedures, will be obsolete at the conclusion of the Procedure Change Process.

On 6 February 2025 the State Electricity Objective (SEO) replaced the Wholesale Market Objectives under section 3A of the Electricity Industry Act 2004.  Following an assessment, AEMO considers the Procedures are consistent with the SEO.

Invitation to make Submissions

AEMO invites written submissions on this Procedure Change Proposal, including any alternative or additional proposals you consider may improve the procedure or better meet the State Electricity Objective in section 3A of the Electricity Industry Act 2004.

Please identify any parts of your submission that you wish to remain confidential, and explain why. AEMO may still publish that information if it does not consider it to be confidential, but will consult with you before doing so.

When making a claim for confidentiality, AEMO encourages respondents to familiarise themselves with Chapter 10 of the Electricity System and Market Rules, which imposes obligations in respect to the release of documents.

Meetings

Before the closing date for submissions, you may request a meeting with AEMO to discuss the issues and proposed changes raised in the Procedure Change Proposal, stating why you consider a meeting is necessary or desirable.

If appropriate, meetings may be held jointly with other stakeholders. Subject to confidentiality restrictions, AEMO will generally make details of matters discussed at a meeting available to other stakeholders, and may publish those details.

Closing Date and Time

Submissions in response to this Procedure Change Proposal should be sent by email to WA.Marketdevelopment@aemo.com.au, to reach AEMO by 5.00 pm (AWST) on 30 June 2025.

All submissions must be in electronic format (pdf or Microsoft Word) and should use the Procedure Change Submission form available on this page.

AEMO is not obliged to consider submissions received after the closing date and time. Any late submissions should explain the reason for delay and the detriment to you if AEMO does not consider your submission.  

Publication

All submissions will be published on AEMO’s website. Confidential information will not be published, other than as specified above.