Tamar Valley Power Station

Tamar Valley Power Station
Location Tamar Valley, Tasmania
Status Base load
Commission date September 2009[1]
Owner(s) Hydro Tasmania
Thermal power station
Primary fuel Natural gas
Combined cycle? Yes
Power generation
Units operational 5
Nameplate capacity 388 MW[1]

Tamar Valley Power Station is a $230 million natural gas-fired power station located in Bell Bay in the Tamar Valley, Tasmania. It is owned by Hydro Tasmania, and is immediately adjacent to the Bell Bay Power Station, which is also owned by Hydro Tasmania, and was decommissioned in 2009.[1][2]

The station includes four peaking units, totalling 178 MW, and one base-load combined cycle unit of 210 MW. The four peaking units are: three 40 MW (total 120 MW) pre-existing (from the Bell Bay Power Station) Pratt & Whitney FT8 Twin Pac gas turbine alternators (Units 101-103), and a single 58 MW Rolls Royce Trent 60WLE gas turbine alternator (Unit 104) commissioned in May 2009. The base-load unit is a 210 MW Mitsubishi M701DA gas turbine operating in combined cycle mode (Unit 201) which completed commissioning in September 2009. The Mitsubishi's combined cycle capacity of 210 MW includes 140 MW generated directly by the M701 gas turbine, and a further 70 MW generated by the Mitsubishi steam turbine generator set.[3]

At the time of conception, the Tasmanian Government allowed Aurora Energy to enter into long term energy supply agreement with Alinta.[2][4] During 2008 the Tasmanian Government via Aurora Energy acquired the construction project from the then owner Babcock & Brown Power (who had earlier purchased Alinta Energy generation assets).[1][5] Aurora set up a fully owned subsidiary company "AETV Power" to complete and operate the power station assets.

On 1 June 2013 the State Government transferred the ownership of the power station from Aurora Energy to Hydro Tasmania, another state owned enterprise, and the predominant generator of electricity in the state.

Following its commissioning, low electricity demand, strong rainfall and substantial use of the Basslink interconnector with Victoria meant that the station generated only small volumes of electricity. In June 2014 Hydro Tasmania commenced the process of mothballing the combined cycle unit, and in January 2015 it sought the Tasmanian Government's approval to sell the unit.[6] In August 2015 Hydro Tasmania announced that the combined-cycle unit was not required for energy security and would be decommissioned and sold.[7] The open-cycle units would be retained for peaking duty. However, only a few months later in December, Hydro Tasmania hired 12 temporary workers at the plant, indicating that the combined-cycle unit may be used again to slow the rate at which Hydro Tasmania's dam storages were depleted.

On 20 December 2015, Basslink announced that the HVDC interconnector with Victoria had experienced a fault and was unable to transmit electricity in either direction. As of 8 March 2016 Basslink estimates that the cable may return to service in May.[8]

Given Basslink's difficulties and the low hydro-electric storage levels, Hydro Tasmania recommissioned Tamar Valley Power Station to help meet Tasmania's electricity needs.[9][10]

See also

References

  1. 1 2 3 4 "Tamar Valley power station on track". ABC News Online. 2009. Retrieved 2009-10-01.
  2. 1 2 "Tasmania allows Alinta power agreement". Melbourne: The Age. 2006-10-26. Retrieved 2009-02-05.
  3. ↑ "AEMO Tasmanian Generators". 2010.
  4. ↑ "Alinta signs $600m gas supply agreements". ABC News Online. 2007. Retrieved 2009-02-05.
  5. ↑ "New acquisition improves energy security for Tamar Valley Power Station". Aurora Energy Online. 2009. Retrieved 2009-09-30.
  6. ↑ "Ministerial Statement on Energy Security". www.premier.tas.gov.au. Retrieved 2016-03-09.
  7. ↑ "Changes to operation of Tamar Valley Power Station | Hydro Tasmania". www.hydro.com.au. Retrieved 2016-03-09.
  8. ↑ "Basslink homes in on underwater cable fault". ABC News. Retrieved 2016-03-09.
  9. ↑ Richards, Blair (29 December 2015). "The Mercury". themercury.com.au. Retrieved 9 March 2016.
  10. ↑ "More generators ordered after delays confirmed on Basslink undersea cable repair". ABC News. Retrieved 2016-03-09.

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