Southdown Power Station
|Southdown Power Station|
Southdown Power Station's turbine stacks
|Location||Southdown, Auckland City|
|Commission date||December 1996|
|Decommission date||December 2015|
|Owner(s)||Mighty River Power|
|Thermal power station|
|Primary fuel||Natural gas|
|Units operational||3× Gas
|Make and model||General Electric|
|Nameplate capacity||170 MW|
|Annual gross output||850 GWh|
Southdown Power Station was a natural gas-fired combined cycle gas turbine cogeneration power station in Southdown, a suburb in southern Auckland City, New Zealand. When operational, it was New Zealand's northernmost power station with a capacity exceeding 50 MW.
The plant was developed by the Southdown Cogeneration Joint Venture, a joint venture between TransAlta and Mighty River Power. The plant had two LM6000 gas turbines and one steam turbine, fueled on natural gas and producing 114MW. The plant was expected to emit about 410,000 tonnes of carbon dioxide annually.
Southdown was owned and operated by electricity generator Mighty River Power (now Mercury Energy), and complemented the company's renewable hydroelectric and geothermal stations. The station, strategically located in the south-central Auckland urban area, provided voltage support for the city, and helped to meet the peak demand requirements in the Auckland region. Southdown was also extensively used during dry periods, when there was insufficient water to run Mighty River Power's eight hydroelectric power stations on the Waikato River at full capacity.
Apart from generating 170 MW of electricity for the wider Auckland area, Southdown also provided steam to the local industrial area near the station. At full capacity, the station could provide 180 tonnes (177 long tons; 198 short tons) of steam per hour, piped from the station to consumers at pressures of 155 and 910 kilopascals (22.5 and 132.0 psi).
In the 2008 - 2009 financial year, Might River Power reported 249,407 tonnes of carbon dioxide emissions from Southdown.
- Decision 280 (PDF), Commerce Commission, 13 September 1996
- NZPA/NZH (24 March 1995). "Mercury Energy plan to build plant in Auckland". Royal Society of New Zealand. Archived from the original on 9 July 2012.
- Rotherham, Fiona (29 March 2000). "Southdown joint-venture deal in offing". NZ Herald. Archived from the original on 9 July 2012.
- "Mighty River Power secures interests in Southdown co-generation plant" (Press release). Mighty River Power. 19 November 2002.
- "Climate Change : Our Footprint". Mighty River Power. 2012. Retrieved 9 July 2012.
- James Weir (24 March 2015). "Mighty River Power to close Southdown power station". Stuff. Retrieved 24 March 2015.
- "Mighty River shutting down Southdown station". New Zealand Herald. 24 March 2015. Retrieved 24 March 2015.