The HVDC Cross-Channel, English HVDC Cross-Channel and French Interconnexion France Angleterre is, with stand 2012, the only high- voltage direct current (HVDC ) between Great Britain and France. The 73 km long line used for the exchange of electrical energy and is designed as a submarine through the Channel.
The current converter stations are located on the French side in Bonningues -lès -Calais and in Sellindge in the UK. The energy transfer can either be done in both directions. In 2005 was transferred to 97.5 % electrical energy from France to England, were carried out at 2.5%, primarily in the summer months, electric power supplies from England to France. The link has an average availability of 98 %.
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The first HVDC Cross - Channel connection was in 1961 between the location of Lydd in England and Echinghen near Boulogne -sur -Mer in France in operation. The converter stations were equipped with mercury vapor rectifiers, run the system as a bipolar HVDC with an operating voltage of ± 100 kV and designed for a maximum transmission capacity of 160 MW. The 64-kilometer long submarine cable was laid directly on the lake floor, which resulted in a failure of this episode, according to cable damage by fishing and maritime operations in the channel.
The original HVDC went out of service in 1984 and was replaced in 1986 by the designed 2,000 MW and perform much strength conditioning between Bonningues -lès -Calais in France and Sellindge in England with 73 km line length. The also designed as a bipolar HVDC route will be operated with a supply voltage of ± 270 kV, both poles ( Pole 1 with 270 kV, pin 2 wired to -270 kV ) can be operated with 1,000 MW independent. The converters consist of thyristors which were modernized in 2011 /2012.