generated: '2026-07-27'
method: derived
source: |
  Terms taken from Ausgrid's own published pages and from the field names in the
  harvested ArcGIS layer schemas (arcgis/). Definitions are grounded in Australian
  National Electricity Market usage; no term is invented and none is asserted to be an
  Ausgrid-published glossary — Ausgrid publishes no vocabulary or data dictionary.
terms:
- term: NMI
  expansion: National Metering Identifier
  definition: >-
    The 10-11 character identifier for a connection point in the National Electricity
    Market. It is the key a customer must supply on Ausgrid's meter data request form,
    alongside the account holder name and postcode.
  source: https://www.ausgrid.com.au/your-energy-use/your-meter-and-supply/access-your-meter-data/how-do-i-find-my-nmi
- term: DNSP
  expansion: Distribution Network Service Provider
  definition: >-
    The regulated operator of the poles, wires and substations that deliver electricity
    to end customers. Ausgrid is the DNSP for Sydney, the Central Coast and the Hunter.
    A DNSP is not a retailer and does not sell energy.
- term: Zone substation
  definition: >-
    A substation stepping sub-transmission voltage down to distribution voltage. Ausgrid
    publishes 15-minute interval demand in MW for 180+ zone substations, one CSV per
    substation per financial year.
  source: https://www.ausgrid.com.au/about-us/about-ausgrid/research-data-sets/distribution-zone-substation-data
- term: Interval data
  definition: >-
    Time-series electricity demand or consumption recorded at fixed intervals. Ausgrid
    publishes network interval demand at 15-minute resolution; customer interval meter
    data is supplied on request for up to 2 years of history in AEST.
- term: DTAPR
  expansion: Distribution and Transmission Annual Planning Report
  definition: >-
    The annual network planning report a distributor must publish. Ausgrid's Rule 5.13A
    reporting year runs May to May, and it commits to publishing 12 months of interval
    data in .csv within 30 business days of the report.
  source: https://www.ausgrid.com.au/about-us/regulation-and-compliance/network-planning/dtapr
- term: UHC
  expansion: Unallocated Hosting Capacity
  definition: >-
    The headroom remaining on the network for additional load or additional generation
    at a given substation and voltage level in a given forecast year. Exposed as the
    fields available_capacity__load__at_n_ and available_capacity__generation_ on the
    Ausgrid_UHC_Data layers.
  source: arcgis/ausgrid-uhc-layer0-primary.json
- term: N-1
  definition: >-
    The contingency planning standard under which the network must still serve demand
    with one element out of service. Ausgrid's hosting capacity figures are stated at
    N-1, and the secondary layer additionally carries n_1_nameplate_capacity.
- term: Feeder
  definition: >-
    A distribution circuit running from a substation into the network. Appears as the
    "object" value on the DTAPR line layer, with a name (e.g. "72F") and a voltage
    (e.g. "33kV").
  source: arcgis/ausgrid-dtapr-2023-layer0.json
- term: Dual function asset
  definition: >-
    An asset performing both transmission and distribution functions, flagged by the
    dual_function field on the DTAPR line layer — a regulatory classification affecting
    which pricing and planning rules apply.
- term: CDR
  expansion: Consumer Data Right
  definition: >-
    Australia's economy-wide data portability regime. Live in energy, but it designates
    electricity retailers as data holders with AEMO as gateway; distributors such as
    Ausgrid are not designated and Ausgrid does not appear in the public CDR energy
    data-holder register.
- term: MSATS
  expansion: Market Settlement and Transfer Solution
  definition: >-
    AEMO's registry through which market participants exchange metering and connection
    point data. Distributors supply data into MSATS; this is the upstream path by which
    Ausgrid meter data reaches retailers, and it is not a public API.
- term: DER
  expansion: Distributed Energy Resources
  definition: >-
    Customer-side generation and storage — rooftop solar, batteries, EV chargers — whose
    connection headroom is what the unallocated hosting capacity dataset describes.
- term: Dynamic connection
  definition: >-
    A connection agreement under which export or import limits vary with network
    conditions. Ausgrid markets "real-time signals" for large customers under this
    heading but names no protocol and publishes no interface.
  source: https://www.ausgrid.com.au/connections/dynamic-connections