2015 National Transmission Network Development Plan

The NTNDP provides an independent, strategic view of the efficient development of the National Electricity Market (NEM) transmission grid over a 20-year planning horizon. AEMO publishes the annual NTNDP as part of its role as national transmission planner under the National Electricity Law, in accordance with clause 5.20.2 of the National Electricity Rules.

The 2015 NTNDP:

  • Reflects on current network investment trends and how these are evolving.
  • Examines the thermal capability of transmission flow paths that connect supply sources to population and industrial centres in the NEM.
  • Discusses factors impacting power system security, such as levels of inertia and the proportion of total generation managed through the dispatch process.
  • Identifies network support and control ancillary service (NSCAS) gaps which may occur in the next five years. These are services that may be needed to manage the security and reliability of the NEM in the near term.

An interactive map to complement the 2015 NTNDP can be accessed via the following link: Interactive Map.

NTNDP generation and transmission outlook

The generation outlook provides a view of the generation required to meet expected operational demand and consumption across the NEM over the next 20 years.

The transmission outlook uses the generation outlook to provide a strategic view of the efficient development of the transmission grid over the next 20 years.

These outlooks were developed for the Gradual Evolution and Rapid Transformation scenarios, with a further sensitivity on each scenario. The scenarios and sensitivities are described in detail in Appendix A of the report.

Annual Planning Reports Project Summary

A consolidated summary of Transmission Network Service Provider (TNSP) projects listed in their 2015 Annual Planning Reports and how they relate to the 2015 NTNDP.

Methodology and Input Assumptions

The modelling methodology and input assumptions are available on the Planning Assumptions page.

2015 Planning Studies Consultation

Each year AEMO engages with industry stakeholders to obtain feedback on proposals for the upcoming NTNDP and planning assumptions. Further information is available on the 2015 Planning Studies Consultation page.