Australia’s electricity market operator has formally asked the Australian Energy Market Commission (AEMC) to introduce new National Electricity Rules governing the operation of large data centres and other inverter-based electricity users, arguing the rapid growth of AI infrastructure requires a new regulatory framework to maintain power system security while supporting continued investment.
The rule change request marks a significant step beyond recent government policy announcements, as the debate from voluntary expectations towards binding electricity market obligations. If accepted by the AEMC, the proposal would begin the formal rule-making process that could ultimately establish new operational requirements for hyperscale data centres and other large electricity users connected to the National Electricity Market (NEM).
AEMO said demand from large inverter-based loads (LIBLs) – including data centres, hydrogen electrolysers and battery charging hubs – had increased materially in recent years and was expected to continue growing over the coming decade, with data centres forecast to account for around 10 percent of underlying NEM demand by 2050. The operator said existing electricity rules were developed before the emergence of these highly dynamic loads and no longer adequately reflected their operational characteristics.
“The current regulatory framework for the connection and management of loads was not designed with the nature and operational capabilities of LIBLs in mind,” AEMO said in its submission. “LIBLs are highly sophisticated and dynamic loads that can be sensitive and responsive to power system conditions.”
Interestingly, AEMO is not proposing that the new rules apply retrospectively to LIBLs already connected to the network, unless doing so proves necessary to address significant security risks – a caveat that leaves some scope for the obligations to reach existing facilities in specific circumstances.
Four key reforms
The proposal centres on four broad reforms designed to improve the integration of large AI-era electricity users into the market.
The first would introduce nationally consistent monitoring and communications requirements, giving AEMO and network operators greater real-time visibility of large loads where they could materially affect network operations or wholesale electricity markets. The operator said current arrangements differ across jurisdictions and network businesses, creating unnecessary complexity for proponents.
Rather than a single blanket standard, the obligations would scale with a facility’s assessed impact. AEMO is proposing a tiered approach drawn from the AEMC’s access standards package 2, under which Tier 1 and lower-impact Tier 2 LIBLs face lighter-handed monitoring obligations, while Tier 2 facilities that contribute to a “significant cumulative impact” (SCI) and all Tier 3 LIBLs would face more stringent real-time data requirements. AEMO has floated an example SCI threshold of 100MW at a bulk supply point, though it says the actual threshold would need to be settled in consultation with LIBLs and network businesses.
Secondly, AEMO wants large data centres and other qualifying loads to provide advance notice of significant planned demand changes, allowing those shifts to be incorporated into forecasting, dispatch and reserve planning processes. The operator argues better information sharing would improve market efficiency, network planning and investment decisions while reducing unnecessary costs for consumers.
Perhaps the most significant proposal is the introduction of limits on how quickly large inverter-based loads can increase or reduce electricity consumption where rapid demand swings could affect frequency, voltage, network stability or wholesale market operations. AEMO noted some data centres already use workload management and battery systems to smooth power demand but said a consistent regulatory framework may now be required as AI infrastructure scales.
Operator push back
Data centre stakeholders consulted ahead of the submission broadly supported AEMO’s aim of clearer, more consistent rules, but pushed back on parts of the ramp-rate proposal specifically. According to AEMO, operators argued that any ramp-rate limits need to be carefully justified, developed with industry input and tested against alternative approaches, noting that demand shifts driven by customer workloads – particularly within colocation facilities – may not always be forecastable.
Finally, AEMO is proposing that certain large data centres maintain operational communications with networks and AEMO and be capable of responding to directions issued during power system security events, similar to arrangements that already apply to generators. The operator said this could allow more targeted interventions during emergencies while avoiding broader customer outages, with eligible facilities able to seek compensation where directions are issued.
Supporting growth while managing risk
Instead of portraying data centres solely as a challenge for the electricity system, AEMO said the sector also presents opportunities. The submission said that stable data centre demand can help absorb increasing volumes of daytime renewable generation, particularly during periods of high rooftop solar output. It also suggests some facilities could provide demand flexibility and frequency control services that reduce the need for more costly market interventions.
“Stable LIBL demand can help mitigate minimum system load events,” AEMO said, adding that data centres “are inherently controllable, with the potential to provide demand flexibility and frequency control services.”
The market operator said the proposed framework is intended to support both continued investment in AI infrastructure and secure operation of the power system, arguing that greater regulatory clarity would ultimately benefit developers as well as consumers.
Aligning with broader AI reforms
The proposal also ties directly into a series of broader government initiatives aimed at managing Australia’s rapidly growing AI infrastructure sector. AEMO said the rule change is intended to align with the federal government’s AI infrastructure reforms, including the recently announced Australian Standards for AI, the earlier Expectations for Data Centres and AI Infrastructure Developers, work underway through the Energy and Climate Change Ministerial Council, the AEMC’s separate access standards reforms, and state-based data centre policies in New South Wales, Victoria and South Australia.
It said a staged implementation would allow the new electricity rules to develop alongside those broader policy initiatives. The submission follows Prime Minister Anthony Albanese’s announcement last week that the federal government intends to introduce mandatory national standards for AI infrastructure, including legal obligations for future large-scale AI data centres to underwrite new electricity generation, fund grid connections and reduce power consumption when needed to help stabilise the grid.
AEMO’s proposal is essentially the electricity market operator’s first formal attempt to translate those broader policy objectives into operational rules for the National Electricity Market.