The report is accompanied by a dataset which includes average daily lake levels for the entire length of record available. These data have been obtained from the Power Archive, which is maintained by OPUS International under contract to the various power generation companies.

The Commission thanks Genesis Energy, Mighty River Power, Meridian Energy, and Contact Energy for supporting the project and providing data.

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)

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

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

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.

Questions on where the available energy is being used, and how efficiently it is being used are becoming increasingly important, as governments plan their energy futures. The focus of recent strategies is on tackling carbon emissions by increasing the uptake of low-emission technologies, such as electricity generation from renewable resources.

This report presents measures of energy use (in petajoules) and economic performance (in constant price GDP) at a national and industry level. The information presented in this report identifies where and how efficiently energy is being used in New Zealand’s economy.

Table 1: Net Electricity Generation by Fuel Type (GWh)
Table 2: Net Electricity Generation by Fuel Type (PJ)
Table 3: Estimated Generation by Fuel Type for 2007 (MWh)
Table 4: Information on Current Generating Plants (10 MW or Greater)
Table 5: Estimated Generating Capacity by Fuel Type for 2007 (MW)
Table 6: Information on Possible Future Plant Changes (10 MW or Greater)
Table 7: Transmission and Distribution Network Statistics for the 2007 March Year
Table 8: Electricity Consumption by the Residential Sector
Table 9: Electricity Consumption by the Commercial Sector
Table 10: Electricity Consumption by the Industrial Sector
Table 11: Electricity Consumption by All Sectors
Table 12: Electricity End Use

Table 1: Renewable Energy Supply and Consumption

Table 1: Total Gas Production by Field
Table 2: Net Gas Production by Field
Table 3: Gas Production (Gross PJ)
Table 4: Gas Use (Gross PJ)
Table 5: CNG Sales (Gross PJ)
Table 6: Gas Consumption by the Residential Sector
Table 7: Gas Consumption by the Commercial Sector
Table 8: Gas Consumption by the Industrial Sector
Table 9: Gas Consumption by All Sectors
Table 10: Historical Net Production and Projected Gas Deliverable (Gross PJ)