Integrating Energy Storage Systems
Goal
The Integrating Energy Storage Systems (IESS Integrating Energy Storage Systems) rule seeks to better integrate storage and hybrid systems into the NEM. As a part of this rule change, the following changes are proposed:
- Introduces a new registration category, the Integrated Resource Provider (IRP Integrated Resource Provider. Any person who owns, controls or operates an integrated resource system connected to a transmission or distribution network must register as an Integrated Resource Provider). The IRP allows storage and hybrids to register and participate in a single Registration Category Generating units modelled in the EAAP are categorised into Baseload, Intermediate or Peaking generation groups. rather than under two different categories.
- Clarity for scheduling obligations that apply to different configurations of hybrid systems. This includes for DC coupled systems (which have different technologies behind a single inverter) allowing them the flexibility to choose whether those technologies are scheduled or semi-scheduled.
- Transferring existing Small Generation Energy Rules Terms Aggregators to the new category and enabling new aggregators of small generating units and/or storage units to register in this category. Market Customers are still able to include small generating and storage units in their portfolios.
- Enabling aggregators registered in this new category to provide market ancillary services from generation and load.
- Amending the framework to recover non-energy costs based on a participant's consumed and sent out energy over relevant intervals, irrespective of the participant category in which it is registered
A part of these changes are effective as per the dates below. These include:
- Allowing aggregators of small generating and storage units to provide ancillary services. These changes are effective from 31 March 2023.
- Hybrid systems to use aggregated dispatch Energy Rules Terms conformance (ADC Aggregated Dispatch Conformance) effective from 08 August 2023.
High-level changes
|
Function |
Description |
Reference |
|---|---|---|
|
EMMS Data Model v5.3 |
New data table/s established to record information provided to AEMO. |
|
|
Markets Portal |
Potential updates to the Market Info, View offers, Settlements, Offers and submissions web interfaces on the Markets Portal |
|
|
API |
Update the NEM Bidding APIs |
|
|
FTP |
Extend the existing capability to support providing additional information required for BDUs. |
|
Detail
The IESS project provides greater clarity for how new technologies and business models, such as batteries and hybrid systems, register and participate in the NEM. AEMO Australian Energy Market Operator considers this important in the context of:
- growing grid scale battery storage connections
- increasing numbers of applications and interest in registering storage systems and hybrid facilities
- an expectation that there will be a growing role for storage into the future.
The project includes changes to Settlements See Relevant Rules or Procedures, Billing and Prudentials, Bidding and Dispatch See National Electricity Rules, Registration and MSATS Market Settlement and Transfer Solutions. The procedures published by AEMO under clause 7.2.8 of the National Electricity Rules, which include those governing the recording of financial responsibility for energy flows at a connection point, the transfer of that responsibility between market participants, and the recording of energy flows at a connection point. streams. The following chapters provide details regarding the changes for each stream.