SO_OP_3705 Dispatch procedure (Dynamic ADC)

Matters under consultation

AEMO is consulting a second time with industry on proposed changes to the SO_OP_3705 Dispatch procedure (Dynamic ADC) document to implement the relevant aggregated dispatch conformance arrangements (ADC) in accordance with clause 11.145.16 of the National Electricity Rules (NER), under the National Electricity Amendment (Integrated energy storage systems into the NEM) Rule 2021 No. 13 (IESS Rule).  

The Dispatch procedure will be in effect from 9 August 2023 to align with the Fast Frequency Response (FFR) project registration process and provision of bids in advance of the rule commencement. This timing will allow implementation efficiencies for AEMO and participants.

Update 31 July 2023

New Participant Message

The Dispatch Procedure has been edited to include a change to Participant message at individual DUID level for SUSPENDED status. This will impact Participants who filter notifications by the text string instead of Status

NON-CONFORMING

ADG declared non-conforming (NC). ADG NC constraint invoked. AEMO is requesting a reason for the NC

SUSPENDED

No action required at the aggregate level. Units excluded from aggregate conformance monitoring 

Updated Publication - 23 May 2023

The Dispatch Procedure has been edited to include a change to Participant message at individual DUID level for SUSPENDED status. This will impact Participants who filter notifications by the text string instead of Status.

Changes highlighted in yellow in the Procedure, include:

• Including the words “or part of a generating system” to the definition of Aggregate or Aggregate System, 

• Removing the words “located behind a connection point” from the definition of Aggregate or Aggregate System to clarify that under the NER a generating system is behind a connection point, and

• Confirming that Aggregate Dispatch Group is known as “ADG_ID” in AEMO’s market systems.

• For the Dispatch Conformance report, also added Participant messages at the ADG level for each status.

Publication of Final report 10 February 2023

In summary, to implement the Dynamic ADC approach, the Procedure now has a:

• Change to the definition of the Target Aggregate type.

• Introduction of a new Mixed Aggregate type.

• Changes to the participation in, and assessment of, ADC for a Mixed Aggregate.

• Changes to how dispatch instructions are issued via AEMO’s AGC.

• Changes to when resource level compliance (RLC) is required, to include intervals where any FCAS regulation is enabled for a unit within a Cap Aggregate or Mixed Aggregate.

• Consequential changes to dispatch instructions and AEMO’s dispatch conformance monitoring.

Consultation process

AEMO’s indicative timeline for this consultation is as follows:

Please send questions to IESS@aemo.com.au. 

Further information

For more information, please contact IESS@aemo.com.au.