Abstract:This is a map of ‘firm substation capacity’ (determined by the local reliability criteria), minus the forecast peak demand at the Zone Substation level. Data mapped is for the relevant critical peak season (summer or winter) at each Zone Substation. Where a constraint occurs in both seasons, the season with the largest capacity shortfall over the time horizon is mapped.This map allows the user to see the progression of load growth relative to distribution zone substation capacity over time, and understand areas of emerging capacity-related constraint. Note that capacity constraints may exist upstream or downstream of the zone substation and as such this map provides an indicative ‘slice’ of the capacity situation through one level of the network. Also note that these images show available capacity before network or non-network options are taken to alleviate constraints, and before load transfer capability between adjacent zones have been taken into account.This map does NOT show:Areas facing power outageThe capacity of the network to accept the connection of embedded or distributed generatorsThe green and yellow colours indicate a period when zones that have sufficient spare capacity (available capacity is around or above zero), while the orange and red colours (where available capacity is below zero) indicate periods where zones facing capacity-related constraints where investment will be needed to ensure reliability is maintained.Polygons shown are approximate Zone Substation service regions. Clicking on a specific region will reveal the details of that location and time period, including the season of constraint and the exact available capacity value for each year.When the user clicks on the distribution zone substation region, a range of additional information is shown in a pop up information box. An explanation of the additional information is given below:Asset Type: Type of the network asset. Data presented in this layer is generally only for the Distribution Zone Substation level, although some businesses have smaller distribution feeder regions represented at times. These assets carry the following definitions:Distribution Zone Substation (ZS): Transformation substation typically (but not exclusively) converting voltage to 11kV on the low voltage side, built and operated by distribution network service providers.Distribution Feeder (DF): Medium or high voltage feeder (e.g. 22 kV or 11 kV) emerging from the ZS to distribute power to downstream smaller, local distribution substations.Network: Name of the Network Service Provider manages the asset.Notes: Additional information on the asset or investment.Constraint Season(s): Primary season of constraint driving network investment (Summer, Winter, Spring and/or Autumn).Demand growth rate (MVA/yr): Average demand growth rate for the asset over the first 5-year horizon.Data Currency: The most recent update of the shown data.Next update: The expected date and source of the next update to the data.The table and chart shows the available capacity at the selected zone over the next ten years in MVA. Where 2025 data is shown for a winter critical asset, this is for the winter occurring in the middle of 2025. Where 2025 data (for example) is shown for a summer critical asset, this is for the summer season bridging 2024/25.The data was supplied by Network Service Providers. The data is stored and processed into mapping outputs by Energy Networks Australia and the Institute of Sustainable Futures (ISF) at the University of Technology Sydney (UTS).© ENERGY NETWORKS AUSTRALIA, 2022Download and Links:Note: downloadable spreadsheet and GIS versions of this data can be accessed from the bottom of the ENA Webpage. https://www.energynetworks.com.au/projects/network-opportunity-maps/Metadata URL:https://nationalmap.gov.au/#share=s-v9AgfIvvhLhHrvXHWHJEpl0RxpW