Wind Generation
Producing electricity from the energy of the wind is an important part of Genesis Energy's generation portfolio. As we move into the future it will become even more important as the need for cleaner, renewable energy increases.
Genesis Energy owns and operates Hau Nui Wind Farm ('strong wind') in the hills south of Martinborough in the Wairarapa. In December 2004 an addition of eight 600kW turbines increased Hau Nui's capacity from 3.85 MW to 8.65 MW. In 2009 Genesis Energy signed land rights agreements with landowners in northern and southern Wairarapara for the future development of wind farms.
The greatest benefit of harnessing wind energy is its minimal impact on the environment - no fuel is required so there are no harmful emissions released into the atmosphere. Wind farms support New Zealand's commitment to reduce greenhouse gas emissions under the Kyoto Protocol.
How does a wind turbine work?
- The wind blows on the blades and makes them turn.
- The blades turns a shaft inside the nacelle (the box at the top of the turbine)
- The shaft goes into a gearbox which increases the rotation speed enough for...
- The generator, which uses magnetic fields to convert the rotational energy into electrical energy. These are similar to those found in other power stations.
- The power output goes to a transformer, which converts the electricity coming out of the generator at around 700 Volts (V) to the right voltage for distribution system, typically 33,000V.
- The national grid transmits the power around the country
Genesis Energy's Hau Nui Wind Farm provides enough power for around 4,200 homes in the South Wairarapa
Factsheet: Wind Generation
