Question: Who operate the power station whose part was replaced by Barker Inlet Power Station?

Context paragraphs:
Quarantine Power Station: Quarantine Power Station is a gas-powered electricity generation facility near the northern end of Torrens Island in the northwestern suburbs of Adelaide, South Australia.  It is at the opposite end of Torrens Island from AGL Energy's Torrens Island and Barker Inlet power stations.  It gets its name from the Torrens Island Quarantine Station which was nearby.

Lünen Power Station: Lünen Power Station is a coal-fired power station in Germany.  It's located in Lünen in the district Unna.  It has an output capacity of 500 megawatts.  The first power station in Lünen was commissioned in 1938.  The power station produces traction current since 1984 also.  The power station has also been producing long-distance heating since late 2003.  Annual coal consumption amounts to 960,000 tons.  The operator of the power station is Evonik Industries.  The power station's chimney is 250 m high.

Pembroke Power Station: Pembroke B Power Station is a 2,000 MWe natural gas-fired power station near Pembroke in Wales.  The power station was officially opened on 19 September 2012 and is the largest gas-fired power station in Europe.  It is also the largest power station to be built in the UK since Drax power station came online in 1986.  Pembroke Power Station currently generates enough power to supply 3.5 million homes and businesses.

Horahora Power Station: Horahora Power Station was an early hydroelectric power station on the Waikato River in New Zealand.  It was the country’s first large-scale power station, completed in 1913.  Initially built to service a gold mine, the power station was expanded to supply a significant part of the North Island.  The power station remained in use until was submerged by Lake Karapiro, which was formed to supply the larger Karapiro Power Station.

Torrens Island Power Station: Torrens Island Power Station is located on Torrens Island, near Adelaide, South Australia and is operated by AGL Energy.  It burns natural gas in eight steam turbines to generate up to 1,280 MW of electricity.  The gas is supplied via the SEAGas pipeline from Victoria, and the Moomba Adelaide Pipeline System (MAPS) from Moomba in the Cooper Basin.  The station is capable of burning either natural gas or fuel oil.  It is the largest power station in South Australia and was formerly the largest single power station user of natural gas in Australia.

Lough Ree Power Station: The Lough Ree Power Station is a large peat-fired power station in Lanesborough, in the Republic of Ireland.  The station generates up 100 MWe of power, ranking as the Third largest peat-fired power station in the country, after West Offaly Power Station at 150 MWe .  and Edenderry Power Station at 120 MWe .  The power station was constructed as a replacement to the ageing 85 MWe Lanesborough power station.

Condamine Power Station: Condamine Power Station is a 140 MW combined cycle power station near Miles on the western Darling Downs in Queensland, Australia.  The station is located 8 km east of Miles on the south side of the Warrego Highway.  The Condamine Power Station is owned by QGC Limited, a subsidiary of BG Group.  It has been claimed to be the world’s first combined-cycle power station entirely fired by untreated coal seam gas and Australia's first steam turbine condenser cooled by coal seam methane waste water.  However, the Townsville Power Station at Yabulu, which was converted from a peak load power station to burn only coal seam gas in a combined cycle configuration, was commissioned much earlier, in February 2005.

Dunston Power Station: Dunston Power Station refers to a pair of adjacent coal-fired power stations in the North East of England, now demolished.  They were built on the south bank of the River Tyne, in the western outskirts of Dunston in Gateshead.  The two stations were built on a site which is now occupied by the MetroCentre.  The first power station built on the site was known as Dunston A Power Station, and the second, which gradually replaced it between 1933 and 1950, was known as Dunston B Power Station.  The A Station was, in its time, one of the largest in the country, and as well as burning coal had early open cycle gas turbine units.  The B Station was the first of a new power station design, and stood as a landmark in the Tyne for over 50 years.  From the A Station's opening in 1910 until the B Station's demolition in 1986, they collectively operated from the early days of electricity generation in the United Kingdom, through the industry's nationalisation, and until a decade before its privatisation.

Barker Inlet Power Station: Barker Inlet Power Station is a proposed power station in South Australia.  It was announced on 7 June 2017 by AGL Energy to replace part of its aging Torrens Island Power Station and would be built alongside the existing station on Torrens Island in the northwestern suburbs of Adelaide.  Construction was expected to start in the third quarter of 2017, with commissioning in the first quarter of 2019.

Fengning Pumped Storage Power Station: The Fengning Pumped Storage Power Station is a pumped-storage hydroelectric power station currently under construction about 145 km northwest of Chengde in Fengning Manchu Autonomous County of Hebei Province, China.  Construction on the power station began in June 2013 and the first generator is expected to be commissioned in 2019, the last in 2021.  Project cost is US$1.87 billion.  On 1 April 2014 Gezhouba Group was awarded the main contract to build the power station.  It will be constructed in two 1,800 MW phases.  When complete, it will be the largest pumped-storage power station in the world with an installed capacity of 3,600 MW.  The power station will operate by shifting water between an upper and lower reservoir to generate electricity.  During periods of low energy demand, such as at night, water will be pumped from Fengning Lower Reservoir up to the upper reservoir.  When energy demand is high, the water is released back down to the lower reservoir but the pump turbines that pumped the water up now reverse mode and serve as generators to produce electricity.  The process is repeated as necessary and the plant will serve as a peaking power plant.

Supporting paragraphs: Barker Inlet Power Station Torrens Island Power Station
Answer: AGL Energy