NSW Fast-Tracks Hunter REZ Upgrades, Unlocking 1.8GW

• NSW fast-tracks 1.8 GW Hunter–Central Coast REZ, first to use existing poles—slashing delays, creating jobs, and upgrading substations and fiber as coal gives way to clean power.

New South Wales has begun building Hunter–Central Coast Renewable Energy Zone network, a partnership of EnergyCo and Ausgrid to connect 1.8 GW of renewables and storage as coal retires. The project upgrades 85 km of sub-transmission, adds 18 km of underground fiber, builds two substations and upgrades others.

Officials say the first REZ to rely on existing distribution poles and wires will speed delivery and ease pushback. Spanning the Upper Hunter to the Central Coast, including Newcastle, Lake Macquarie and Port Stephens, the project gained planning approval in September 2025 and will create 590 construction jobs and 220 operational jobs.

How will NSW’s Hunter–Central Coast REZ accelerate grid integration of 1.8 GW renewables?

• Uses existing distribution corridors to avoid lengthy greenfield transmission builds, compressing connection timelines for projects queued in the zone
  
• Standardized, modular substation and feeder designs let multiple wind, solar, and battery plants connect in parallel rather than sequentially
  
• A single REZ access framework clarifies queue priority, curtailment rules, and performance standards, reducing renegotiation with each proponent
  
• Upgraded protection, two‑way flow capability, and voltage control gear enable higher hosting capacity without stability penalties
  
• Grid‑forming batteries and fast frequency response services in the zone provide system strength and inertia substitutes, lifting the cap on variable renewables
  
• Real‑time visibility via new communications links improves AEMO/NSP dispatch, constraint management, and fault location, minimizing unnecessary curtailment
  
• Dynamic line rating and thermal monitoring allow more megawatts to run during favorable conditions, accelerating export of new generation
  
• Staged connection hubs concentrate switching and metering, shortening contestable works and simplifying compliance testing
  
• Pre‑approved connection envelopes let projects energize earlier while final augmentations continue, bringing partial capacity to market sooner
  
• Coordinated outage planning across the REZ reduces commissioning bottlenecks that typically delay energization
  
• Curtailment-sharing and firm access principles spread congestion risk, making financing easier and speeding final investment decisions
  
• Co‑located storage soaks midday and high‑wind surpluses, firming output to meet evening peaks and easing integration into wholesale and FCAS markets
  
• Demand‑side participation agreements with large industrial and urban loads nearby create firm offtake and local balancing, cutting export constraints
  
• Early community benefit programs and use of existing corridors lower social license risk, reducing appeals that slow grid works
  
• Digital twins and EMT models for the whole zone let operators validate controls upfront, shrinking commissioning and tuning periods