Rule Change: Open
On 2 July 2020 the Australian Energy Market Commission (AEMC) initiated a rule change request from Delta Electricity to introduce new 30-minute raise and lower “ramping” frequency control ancillary services (FCAS) into the national electricity market (NEM) to respond to changes in output from variable renewable electricity generators.
This rule change request is being considered as part of a wider Commission work program on system services looking at new ways to deliver system services as the power system evolves.
As the power system transitions, we need new ways of delivering theses system services – such as frequency response, inertia, system strength and reserve services – to keep the technical characteristics of the power system within safe limits and to provide a secure and reliable service to consumers.
Rule change request from Delta Electricity
On 4 June 2020, the AEMC received a rule change request from Delta Electricity which seeks to amend the National Electricity Rules to introduce 30-minute raise and lower ramping services using the existing FCAS market design framework.
Delta Electricity suggests a ramping service would address price volatility derived from dispatchable generators as they ramp through their energy bid stacks in response to predictable, daily, high rates of change from solar PV generation ramping up and down in the morning and evening.
Delta Electricity proposes this service be;
- procured from dispatchable in-service generators,
- reflect a similar dispatch and settlement process to existing FCAS raise and lower services, but with provision for generators to offer (perhaps three) incremental rates of change at different prices, and
- participants in this service would not be prevented from bidding into the other FCAS markets as long as they can comply with the associated obligations of each.
A consultation paper was published on 2 July 2020 seeking feedback on this, and other related rule change requests by 13 August 2020.
On 24 September 2020, the Commission extended the timeframe to make a draft determination until 24 June 2021. This extension will enable us to better align the work with the ESB’s market design project so the issues raised can be addressed cohesively, give more consideration to the complex issues raised and priorities more urgent system security issues. The extension will also allow for AEMO to provide technical advice to inform both our assessment of the rule change request and the ESB’s assessment of an operating reserve demand curve and mechanism as part of its Resource adequacy mechanisms and Essential system services market development initiatives.
Other relevant system services rule change processes underway
The AEMC has seven rule change requests relating to the provision of system services that it is currently assessing. Collectively, the AEMC refers to these rule requests as the “system services” rule change requests.
These system services rule change requests complement and are interdependent with the work of the Energy Security Board (ESB) to develop advice on a long-term, fit-for-purpose market framework to support reliability that could apply from the mid-2020's. The AEMC is working closely with the ESB and the other market bodies as it progresses these rule change requests.
We are considering the interactions between issues raised in the different rule changes so that any new frameworks developed in response to the rule change requests will be focused on delivering the most efficient outcomes for consumers.
The AEMC will be making draft determinations for each of the rule change requests over the coming year prioritising more urgent system security issues while continuing to coordinate with ESB work and seek key technical input from the Australian Energy Market Operator (AEMO).
More information on each of the system services rule changes can be found at the links below:
- Fast frequency response market ancillary service (Infigen Energy)
- Primary frequency response incentive arrangements (AEMO)
- Operating reserve market (Infigen Energy)
- Capacity commitment mechanism for system security and reliability services (Delta Electricity)
- Introduction of ramping services (Delta Electricity)
- Efficient management of system strength on the power system (TransGrid)
- Synchronous services markets (Hydro Tasmania)