The HVDC Moyle Interconnector is the 500 MW HVDC link between Auchencrosh, South Ayrshire in Scotland and Ballycronan More, County Antrim in Northern Ireland, which went into service in 2001. It is owned and operated by Mutual Energy.
Mutual Energy is a mutual company which manages the Moyle Interconnector (and some high pressure gas transmission assets including the Scotland - Northern Ireland Pipeline) for the benefit of Northern Ireland's energy consumers.
Work was completed in 2016 to replace the subsea sections of the LV return conductors with two new return cables. This was carried out by Nexans (Norway) with the aid of Morrows (N.I) and Romac Civil Engineering (N.I).
Aerial photograph of area where Moyle Ballycronan More HVDC converter station is. It is situated left-up the power station
(Scotland & N. Ireland)
|From||Auchencrosh, South Ayrshire|
|To||Ballycronan More, County Antrim|
|Type of current||HVDC|
|Total length||63.5 km (39.5 mi)|
|Power rating||500 MW|
|DC voltage||250 kV|
|No. of poles||2|
The HVDC Moyle Interconnector has a capacity of 500 MW. It consists of two coaxial 250 kV DC cables with integrated return conductors (IRC), each cable having a transmission capacity of 250 MW. The IRCs have failed through the events below, and their function restored by laying separate return conductors. The converter stations are equipped with light-triggered thyristors.
The converter station at Auchencrosh is connected via a 64 kilometres (40 mi) single-circuit 275 kV overhead three-phase AC line, which is installed on delta-type pylon, to Coylton substation, where the connection with the high voltage grid of Great Britain takes place. The connection to Northern Ireland is then made through dual 63.5-kilometre (39.5 mi) long monopolar cables, of which 55 kilometres (34 mi) are submarine cables. The Ballycronan More converter station is connected into the Northern Ireland grid through two 275 kV circuits.
In August 2011, the interconnector went out of service. Repairs were made and the cable became operational again with 450 MW in February 2012. However, further faults meant that a major part of the interconnector had to be taken out of service until it could be augmented with the additional return cables, completed in 2016. This restored capacity to the full 500 MW.
In February 2017, the cable suffered another fault, halving capacity to 250 MW. However full capacity was restored in September 2017, following repairs by Nexans.
Intraday capacity trading is not available, but is being discussed.
|Auchencrosh converter station|
|Cable enters sea|
|Cable leaves sea|
|Ballycronan More converter station|
Ballycronan More is a townland of 356 acres in County Antrim, Northern Ireland. It is situated in the civil parish of Islandmagee and the historic barony of Belfast Lower.The HVDC Moyle Interconnector is the HVDC link between Auchencrosh, South Ayrshire in Scotland and Ballycronan More, County Antrim, which went into service in 2001. It is owned and operated by Mutual Energy. The Static Inverter Plant is sited in Ballycronan More.Ballylumford power station
Ballylumford power station is a natural-gas-fired power station in County Antrim, Northern Ireland, UK. With its main plant generating 600 megawatts of electricity, it is Northern Ireland's largest power station and provides half of the province's power. Overall the station produces 1,316MW. The plant is located at the tip of the Islandmagee peninsula, which separates Larne Lough from the Irish Sea. The lough is a Site of Special Scientific Interest.
The 3 chimneys of the power station are 126 metres tall. East of the station is the static inverter plant of HVDC Moyle, a power cable connecting the system to Great Britain.British Energy Efficiency Federation
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Malcolm Eccles (born 1969) is a utilities senior executive. Eccles is currently the Chief Executive Officer & Managing Director of the Basslink group based in Melbourne, Australia. Eccles was born in Whitehaven, Cumbria. In addition to his work with Basslink, he also serves as a Non-executive director on the boards of City Gas (Singapore) and Gippsland Water (Australia). He has also been a director and Executive Committee member of the ICPC (International Cable Protection Committee) since 2007.
Eccles has been involved in HVDC and submarine cable technology since 2002. His engineering career commenced in 1986 when he served an apprenticeship with British Nuclear Fuels Ltd (BNFL). He stayed with BNFL for 16 years, leaving the organisation in 2002 to join Siemens PTD (power, transmission & distribution), now called Siemens Energy Sector. He worked with Siemens from 2002 until 2005 splitting his time between managing the O&M contract for the HVDC Moyle Interconnector and developing a services business. He joined Basslink in 2005 originally to recruit and train operational & engineering teams and too ensure the company was ready to operate in the Australian energy market.
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The GB grid is connected as a wide area synchronous grid nominally running at 50 Hertz. There are also undersea interconnections to other grids in northern France (HVDC Cross-Channel), Northern Ireland (HVDC Moyle), the Isle of Man (the AC Isle of Man to England Interconnector), the Netherlands (DC BritNed) and the Republic of Ireland (the DC EirGrid).
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