Hau Nui Wind Farm

Hau Nui Wind Farm
The seven stage 1 turbines from Range Road
Map
CountryNew Zealand
Locationsouth-east of Martinborough, Wellington region
Coordinates41°21′42″S 175°29′2″E / 41.36167°S 175.48389°E / -41.36167; 175.48389
StatusOperational
Commission date1996 (1996), 2004
Wind farm
TypeOnshore
Hub height46 m (151 ft)
Rotor diameter40 m (131 ft)
Power generation
Units operational15
Make and modelEnercon: E-40
Nameplate capacity8.65 MW
Capacity factor29.0%
Annual net output22 GWh
External links
Websitewww.genesisenergy.co.nz/hau-nui-wind-farm

The Hau Nui Wind Farm is a 15-turbine wind farm located approximately 21 kilometres (13 mi) south-east of Martinborough, in the South Wairarapa District of New Zealand. Hau Nui (Māori for "big wind") was the first wind farm built in New Zealand.[1]

The wind farm was built in two stages and the completed capacity is 8.65 MW.[2] Originally owned by Genesis Energy, in October 2024 the farm was sold to NZ Windfarms.[3]

Site

Hau Nui wind farm is located on a ridge adjacent to White Rock Road, the main road between Martinborough and White Rock. Stage 1 is situated on Range Road near its intersection with White Rock Road. Stage 2 is located approximately one kilometre south of Stage 1 on Range Road.

The site has an average wind speed of 9.2–9.5 metres per second (30–31 ft/s).

Turbines

Hau Nui has a total of fifteen Enercon E-40 wind turbines. The seven Stage 1 turbines are third-generation turbines, delivering 550 kW each. The eight Stage 2 turbines are later versions of the same Enercon E-40 model, each generating 600 kW each.

The turbines in both stages are 46 metres (151 ft) tall to the hub, and have rotor diameters of 40 metres (131 ft).

Transmission

Electricity generated by Hau Nui is injected into the local distribution grid. The 400 V electricity generated by each turbine is stepped up by transformers at the base of the turbine - to 11,000 V for stage 1 turbines and 33,000 V for stage 2 turbines.

33 kV lines from stage 2 take electricity 24 kilometres (15 mi) to Martinborough to supply the town. Stage 1 turbines connect to 11 kV lines to supply the local area, or connect to the Stage 2 to Martinborough 33 kV lines through a 750 kVA transformer to the north side of the stage.

During peak demand, electricity generated by Hau Nui is used by Martinborough and the eastern South Wairarapa district. During off-peak, Hau Nui electricity can supply the entire South Wairarapa district via 33 kV lines connecting Martinborough with Featherston, Greytown, and Pirinoa. If local demand is low, some electricity may be exported to the national grid through Transpower's Greytown substation.

See also

References

  1. ^ "New Zealand Energy Data File" (PDF). Ministry of Economic Development. June 2008.
  2. ^ "Hau Nui Wind Farm". New Zealand Wind Energy Association.
  3. ^ "Genesis sells Hau Nui wind farm to NZ Windfarms". New Zealand Herald. 24 October 2024. Retrieved 25 October 2024.

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