The Commission is required to establish, maintain, and publish a Centralised Dataset (CDS) under Part F of the Electricity Governance Rules.

The purpose of the Centralised Dataset is to support efficient planning processes by ensuring the collection and maintenance of historical information required to make decisions on transmission and transmission alternatives.

The Centralised Dataset includes:

Half - Hourly Data

Meter data

• HVDC flows
• Active power by grid exit point
• Reactive power by grid exit point
• Generation by grid injection point

Bids and offers

Prices

• Final prices

Binding constraints

Hydrology data

Historic hydro inflows (New Spectra Update to end of June 2008 now available)

Historic lake levels (new report)

Report discussing reconciliation of hydro inflow datasets

Network configuration data

• Transmission network
• System load flow models
• PSS/E
• DigSilent
• Line diagrams
• Circuit breaker information
• Circuit breaker ratings
• Bus fault levels

Copies of the Centralised Dataset can be requested by sending an email to info@electricitycommission.govt.nz with the words “CDS registration” in the title.

You will be asked by return email to provide contact details and agree to a disclaimer and confidentially statement before a copy of the CDS will be dispatched.

The Commission will maintain a register of recipients of the Centralised Dataset. The Commission requires this information to:

• Inform you of any future updates to the CDS
• Record recipients of the CDS due to the sensitive nature and copyright status of some of the material.

Archived Centralised Dataset documents

• Centralised dataset supplementary material

Web interface

Casual users may prefer the Web Interface to the CDS. The Web Interface allows users to access summarised half-hourly data from the CDS with a simple query tool. It is free and does not require registration.