South African utility Eskom has awarded a contract for refurbishment and upgrade of four generators at the 360-MW Gariep hydroelectric project on the Orange River in the Eastern Cape.
Eskom Generation awarded the 22 million euro (US$33.9 million) contract to Alstom Hydro to refurbish the units of Gariep, which was built in the 1970s. Alstom Hydro said the work would extend the life of the machines, increase their output to 112 megavolt-amperes from 100 MVa, increase plant availability, and reduce maintenance and operation costs.
Eskom originally planned to conduct generator refurbishments as normal maintenance at Gariep, which includes South Africa’s largest reservoir. However, it embarked on a feasibility study to identify requirements for a complete unit capacity upgrade. (HNN 4/4/08)
Alstom Hydro said the work includes replacement of stator frames, stator cores, stator windings, and rotor windings of all four units. The first unit is scheduled for delivery in September 2009 and the last early in 2011.