At a glance
NSW transmission at a glance
Quick answers
Transgrid, quickly
Do I apply to Transgrid or AEMO for a NSW transmission connection?
You apply to Transgrid as the network service provider; AEMO is involved in negotiating performance standards under clause 5.3.4A and in market and technical registration before energisation.
What does the connection enquiry involve?
A formal enquiry with technical specifications - fees scale with the response scope, and the response includes a preliminary system strength assessment under the NER framework. Transgrid publishes enquiry response timeframes; the proponent-side variable is submission quality.
What is the remediate-or-pay choice?
NSW's system strength framework gives connecting parties the choice between funding remediation works and paying system strength charges - getting that decision right requires modelling both options honestly.
How do NSW Renewable Energy Zones affect a Transgrid connection?
Projects inside declared REZs navigate the REZ access framework alongside the NER Chapter 5 process - two processes that need one programme. REZ engineering covers the zone side.
What studies does a Transgrid connection need?
The full NEM suite: system strength (preliminary then full impact assessment where triggered), fault level, stability and GPS compliance modelling - RMS in PSS®E, EMT in PSCAD, with validated models through commissioning. Storage and hybrids negotiate charge/discharge behaviour into the GPS.
How long does a Transgrid connection take?
Commonly a year-plus from enquiry to agreement for major plant, with REZ access processes running on their own clocks where they apply. Use Transgrid's pre-connection engagement to test connection point options before the formal enquiry.
Where does a distribution-scale battery in NSW apply instead?
To the local distributor - Ausgrid, Endeavour Energy or Essential Energy - under the embedded generation framework, with larger systems commonly stepping up into Chapter 5 and AEMO registration. See NEM distribution connections.
The pathway
Transgrid's path to an offer
- Early engagement
Transgrid offers pre-connection engagement; use it to test connection point options.
- Connection enquiry
Formal enquiry with technical specifications; fees scale with the response scope.
- System strength preliminary assessment
Part of the enquiry response under the NER framework.
- Application to connect
Detailed investigation toward an offer, including proposed performance standards and models - storage and hybrids negotiate charge/discharge behaviour into the GPS.
- Offer to connect and agreements
Including arrangements for identified user shared assets where they apply.
- Delivery, registration and commissioning
Through AEMO registration and R1/R2 validation.
Studies
The full NEM suite
APD's NSW record runs from the Eraring BESS 330 kV connection design to Independent Engineer on Waratah Super Battery - BESS grid connection.
The honest part
Where it gets hard
NSW's framework gives connecting parties the remediate-or-pay choice - getting that decision right requires modelling both options honestly, which is study work APD does for proponents.
Projects in and around NSW REZs navigate access schemes alongside the NER process - two processes, one programme. REZ engineering.
Popular corridors carry queues of enquiries; a credible, well-modelled application is what separates progressing projects from waiting ones.
Official documents
Transgrid's own pages
Last reviewed: October 2026 · Always confirm current requirements with the network directly.
Proof, not promises
APD in New South Wales
Waratah Super Battery
Independent Engineer on one of the world's most powerful batteries.
The project →
Eraring BESS
Grid connection design for the battery at Australia's largest power station site.
The project →Keep navigating