Otahuhu Power Station

Otahuhu Power Station
Location of Otahuhu Power Station
Country	New Zealand
Location	Otahuhu, Auckland
Coordinates	36°57.072′S 174°51.923′E / 36.9512°S 174.865383°E / -36.9512; 174.865383Coordinates: 36°57.072′S 174°51.923′E / 36.9512°S 174.865383°E / -36.9512; 174.865383
Status	Operating
Commission date	2000[1]
Owner(s)	Contact Energy
Power station information
Primary fuel	Natural Gas
Generation units	Siemens V94.3A(2)
Power generation information
Maximum capacity	404 MW[2]

The Otahuhu power station site holds two plants; Otahuhu A (open cycle gas turbines, now synchronous compensation) and Otahuhu B (a 404 MW combined cycle). The station is owned and operated by Contact Energy.

Otahuhu A (OTG)

The first generating units at Otahuhu were open cycle gas turbine Stal-Laval units, commissioned in 1968. In 1978, a further two generating units were added, twin pack units using Rolls Royce Olympus gas turbines. Due to the age of these gas turbines, they have been retired from service. The generators remain in use in synchronous compensate duty, providing reactive power to the grid.

Otahuhu B (OTC)

The combined cycle plant was commissioned in January 2000.^[1] This natural gas fired plant comprises a Siemens V94.3A(2) gas turbine in single shaft configuration. The HRSG is unfired triple pressure with reheat. Steam cycle cooling is by a hybrid wet - dry cooling tower, using sea water makeup.

At commissioning, the plant capacity was 385 MW. In 2005, upgrades to plant components (including the gas turbine compressor) resulted in an increase of plant capacity to approximately 404 MW.^[2]

See also

• List of power stations in New Zealand

References

1. ^ ^{a b} "Energy Data File". MED. July 2009. http://www.med.govt.nz/edf. 
2. ^ ^{a b} "Thermal electricity brochure - Otahuhu B CCGT". Contact Energy. 2007. pp. 5/6. http://www.contactenergy.co.nz/web/pdf/environmental/Thermal_brochure.pdf. Retrieved 23 November 2009. 

External links

• Contact Energy website