Lakvijaya Power Station

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Lakvijaya Power Station
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Wind turbines of the Mampuri and Madurankuliya wind farms, near the Lakvijaya Power Station.
Lakvijaya Power Station is located in Sri Lanka
Lakvijaya Power Station
Location of Lakvijaya Power Station in Sri Lanka
Country Sri Lanka
Location Norocholai, Puttalam
Coordinates Lua error in package.lua at line 80: module 'strict' not found.
Status Operational
Construction began 11 May 2006
Commission date 22 March 2011
Construction cost US$1.35 billion
Operator(s) Ceylon Electricity Board
Thermal power station
Primary fuel Coal
Power generation
Units operational 3 × 300 MW
Nameplate capacity 900 MW

The Lakvijaya Power Station (also known as the Norocholai Power Station, after its location) is the largest power station in Sri Lanka. The power station is in Norocholai, Puttalam, on the southern end of the Kalpitiya Peninsula. Construction of the facility began on 11 May 2006, with the first unit commissioning on 22 March 2011.[1] The first 300-megawatt phase was completed and ceremonially commissioned by President Mahinda Rajapaksa on 22 March 2011 at 18:27 local time, with the presence of Minister of Energy Champika Ranawaka, deputy Minister of Energy Premalal Jayasekara. The former minister of Energy John Seneviratne could not attend as he was injured in a traffic accident on the way to the ceremony.[2][3]

According to the Ceylon Electricity Board, the US$455 million first phase generates nearly 1.7 TWh of electricity annually — a significant amount when compared to Sri Lanka's total production of 11.5 TWh in 2011.[4] The plant is connected to the grid via 115 km (71 mi) 220-kilovolt transmission line to Veyangoda. Power station exhausts are emitted through a 150 m (492 ft) tall chimney, one of the country's tallest man-made structures.[1]

During its pre-development stages, protests were launched by residents living at the project site, claiming that they were deceived by the government.[5]

Incidents

  • A large fire broke out on 24 October 2010. According to the Ceylon Electricity Board, there were no casualties. The Ministry of Power and Energy commented that damages to the facility would be borne by the constructors and not the government or the developers.[6]
  • On 22 July 2012, the power station ceased operations due to a leak in one of the thousands of tubes carrying water between the boiler. The country was put into controlled regional power outages to cope with the missing 300MW.[7]
  • On 8 August 2012, a tripping of the powerline from Lakvijaya caused the power station to cease operations.[8]
  • The generation capacity of the power station exceeded its designed levels of 300MW on 29 January 2013, causing a complete shutdown. The plant was reactivated a day later.[9][10]

Operation

In the plant, basically the electricity is produced using a steam turbine which is capable of producing 300MW. Coal is used as the fuel to produce steam that will then be used to rotate the turbine in the speed of 3000 rpm. Coal is imported from Indonesia since it is cheap and good quality. The coal in India is cheaper as compared with Indonesia, but Indonesian coal is used since the Indian coal contains more sulfur. Despite this, the vessels that carry coal come from a Russian port.[11]

At first the coal is brought from Indonesia via ships (65 tons per ship). The ships are anchored around 4 km from shore. This coal is brought in to the plant by using barges (long flat-bottomed boats) and then by conveyors.

The coal should be maintained around 10% moisture content immediately before it is used. It needs to be ground as powder before it is burnt. There are five "mills" that pulverize (grind) the coal. Basically, four ball mills work at a time while another one is in standby.

See also

References

  1. ↑ 1.0 1.1 Lua error in package.lua at line 80: module 'strict' not found.
  2. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  3. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  4. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  5. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  6. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  7. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  8. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  9. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  10. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  11. ↑ http://www.sundaytimes.lk/141207/news/another-controversy-over-coal-shipment-why-from-russian-port-131634.html
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