|Tumut 1 Power Station|
An aerial photo of Tumut Pondage and dam, 2009.
|Creates||Tumut Pond Reservoir|
|Capacity||52,793 megalitres (1,864.4×106 cu ft)|
|Catchment area||332 square kilometres (128 sq mi)|
|Surface area||202.7 hectares (501 acres)|
|Hydraulic head||292.6 metres (960 ft)|
|Installed capacity||330 megawatts (440,000 hp)|
|Annual generation||847 gigawatt-hours (3,050 TJ)|
|As of May 2013|
|Tumut Hydroelectric Power Station|
Service entrance to the Tumut 2 Power Station
|Location||Snowy Mountains Scheme, New South Wales|
|Commission date||Tumut 2. 1962|
|Owner(s)||Snowy Hydro Limited|
|Power station information|
|Generation units||Tumut 2. 4|
|Power generation information|
|Maximum capacity||Tumut 2. 286.4 MW (384,100 hp)|
|Tumut 3 Power Station|
Tumut 3 Power Station
|Official name||Tumut Hydroelectric Power Station 3|
|Upper reservoir||Talbingo Reservoir|
|Reservoir capacity||921,400 ML (32,540×106 cu ft)|
|Catchment area||1,093 km2 (422 sq mi)|
|Surface area||1,935.5 ha (4,783 acres)|
|Maximum depth||110 m (360 ft)|
|Pumped-storage station information|
|Hydraulic head||150.9 metres (495 ft)|
|Power generation information|
|Installed capacity||1,500 megawatts (2,000,000 hp)|
|Net generation||812 gigawatt-hours (2,920 TJ)|
Tumut Hydroelectric Power Station (English pronunciation: /ˈtjuːmət/) is a series of three hydroelectric power stations on the Tumut River in New South Wales, Australia, that are part of the Snowy Mountains Scheme.
The generating assets of the three Tumut power stations are owned by Snowy Hydro Limited, a company whose shareholders include the governments of Australia, New South Wales, and Victoria. The company is also licenced to manage the water rights used by the power stations.
Tumut 1 Power Station 
Located downstream of Tumut Pond Dam and 366 metres (1,201 ft) below ground level, Tumut 1 Power Station is situated approximately 3 kilometres (1.9 mi) south-east of Cabramurra. The conventional hydroelectric power station has four turbine generators, with a generating capacity of 330 megawatts (440,000 hp) of electricity; and a net generation of 847 gigawatt-hours (3,050 TJ) per annum. The power station was completed in 1959, and has 292.6 metres (960 ft) rated head.
The first 330 kiloelectronvolts (53 fJ) transmission lines were commissioned in New South Wales at the Tumut 1 Power Station during the 1950s. These cables were manufactured in England and linked to the underground transformers at Tumut 1, and connected with the transmission line. The lines carried power to Sydney where new sub-stations were established, to handle the upgrade from 132 kiloelectronvolts (21.1 fJ) transmission lines. This innovative plan, which faced significant scepticism initially, was considered to be at the forefront of technology which challenged designers and overseas manufacturers. Extra high voltage was in its infancy in the early 1950s. The lines were subject to a 1,000 kiloelectronvolts (160 fJ) test on the cables prior to them going into service. These cables and the transmission system have been in service now for over 50 years.
The original transformer at Tumut 1 weighed 81.2 tonnes (89.5 short tons); and each assembled generator rotor is in excess of 203 tonnes (224 short tons) necessitating delivery in component pieces and assembly on site.
Upper Tumut Power Station is sometimes used as a collective term to refer to both Tumut 1 and Tumut 2 Power Stations.
Tumut 2 Power Station 
Tumut 2 Power Station is located near Cabramurra, some 244 metres (801 ft) below ground level. The conventional hydroelectric power station has four Francis turbine generators, with a combined generating capacity of 286.4 megawatts (384,100 hp) and a net generation of 787 gigawatt-hours (2,830 TJ) per annum. The power station was completed in 1962, and has 262.1 metres (860 ft) metres rated head. Water flows through the turbines at the rate of 118.9 cubic metres per second (4,200 cu ft/s).
The conventional gravity-fed hydroelectric power station is fed by water held in Tumut Two Pondage and from water discharged from Tumut 1 Power Station. The station is connected to the National Electricity Market via the Cabramurra substation.
Upper Tumut Power Station is sometimes used as a collective term to refer to both Tumut 2 and Tumut 1 Power Stations.
Tumut 3 Power Station 
Tumut 3 Power Station is the first pumped storage hydroelectric power station in Australia. Pump-storage schemes use off-peak energy to pump water to a reservoir on a higher level. This water then passes through turbines to generate electricity when prices are higher. The sole powerhouse is located above ground, approximately 1,800 metres (5,900 ft) below Talbingo Dam.
The power station is fitted with six Toshiba turbines, each equipped with Melco-manufactured generators, has a combined generating capacity of 1,500 megawatts (2,000,000 hp) of electricity. The power station was completed in 1973, and has 150.9 metres (495 ft) rated head. Water is pumped through six pipelines, each 488 metres (1,601 ft) long and 5.6 metres (18 ft) in diameter, delivering water to Talbingo Reservoir.
During 2003, Snowy Hydro commissioned six 140 kilowatts (190 hp) micro-hydro generators on the existing cooling water systems on each of the six generating units at Tumut 3 Power Station. These GreenPower accredited units enable Snowy Hydro to save approximately 3,137 tonnes (3,458 short tons) of carbon dioxide per annum. In addition, this installation not only captures previous wasted renewable energy, but also will be substantially reducing the noise that was associated with the previous pressure reducing valves on the six generating unit's cooling systems. Between 2009 and December 2011, there was a major upgrade of Tumut 3, adding additional capacity in the range of 25 megawatts (34,000 hp) to 50 megawatts (67,000 hp) per unit.
See also 
- Macquarie Dictionary, Fourth Edition. Melbourne: The Macquarie Library Pty Ltd. 2005. ISBN 1-876429-14-3.
- "Tumut-1 Hydroelectric Power Station Australia". Global Energy Observatory. 11 May 2012. Retrieved 6 May 2013.
- "Register of Large Dams in Australia" (Excel (requires download)). Dams information. The Australian National Committee on Large Dams Incorporated. 2010. Retrieved 6 May 2013.
- "Innovations". Snowy! The power of a nation. Powerhouse Museum. Retrieved 6 May 2013.
- "Lifting devices". Snowy! The power of a nation. Powerhouse Museum. Retrieved 6 May 2013.
- "Tumut-2 Hydroelectric Power Station Australia". Global Energy Observatory. 23 May 2012. Retrieved 13 May 2013.
- "Tumut-3 Pumped Storage Hydroelectric Power Plant Australia". Global Energy Observatory. 11 May 2012. Retrieved 6 May 2013.
- "The Engineering". Energy: Hydro. Snowy Hydro Limited. Retrieved 6 May 2013.
- "The Snowy Mountains Scheme". Technology in Australia 1788-1988. Australian Science and Technology Heritage Centre. 2000. Retrieved 11 December 2006.
- "Australian Hydro Projects: Operating". Energy News Bulletin. Aspermont Ltd. 28 April 2006. Retrieved 6 May 2013.
- "Tumut 3 Micro Hydro Generators". Energy: Mini Hydro Developments. Snowy Hydro Limited. Retrieved 6 May 2013.
- "Power Stations". Snowy Hydro.
- "Civil structures: Snowy Mountains Scheme". HSC technology syllabus. Powerhouse Museum.
- "The Snowy Mountains Scheme - Australia" (PDF). Snowy Mountains Hydroelectric Authority. University of Technology Sydney.
A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia.