ABB has been awarded the refurbishment of the 1,400 km high-voltage DC (HVDC) transmission line between the 2,075 MW Cahora Bassa dam in Mozambique and South Africa. The Songo-Apollo HVDC link was first installed in the late 1970s, but was largely destroyed during 25 years of civil war and it stood unused for many years. Finally, a refurbishment project that included the replacement or repair of nearly all the 4,200 transmission line towers on the Mozambique side brought the system back online in 1998. The commissioning will be completed in two parts, with the DC equipment in the second half of 2013 and the transformers a year later. As with the Apollo upgrade, this project will enhance availability and reliability, ensuring a steady flow of power from Cahora Bassa.
Source: ABB
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