Alstom Hydro announced March 14 it received two contracts totaling 36 million euros (US$47.6 million) to refurbish the 855-MW Plavinas hydroelectric project in Latvia and the 68-MW Naverede project in Sweden.
Latvian utility Latvenergo awarded a 32.01 million euro (US$42.39 million) contract to Alstom for refurbishment, supervision of installation, and commissioning of turbine Units 5 and 7 and generator Units 4, 5, and 7 of Plavinas on Latvia’s Daugava River.
Work includes new Francis runners, governors, stator windings, excitation systems, and control and protection systems. The first unit is to be delivered in March 2008 and the last in 2010. The work is to increase output of turbines to 90 MW from 85 MW and generators to 105 megavolt-amperes from 97 MVa.
Over the past 10 years, Latvenergo has been refurbishing Plavinas, which was commissioned in 1965-1966 100 kilometers east of Riga. It previously hired Alstom, of France, to upgrade Units 2, 4, and 8. The current contract is to complete the refurbishment of the project, the largest power plant in the country.
In 2006, Latvenergo awarded a 1.5 million euro (US$1.8 million) contract to Electrowatt-Ekono Ltd., in cooperation with Fortum Service, and two local partners, to provide owner’s engineering services for a reserve spillway project at Plavinas.
Generator to be refurbished at 68-MW Naverede
Vattenfall Indalsalven AB, a unit of Swedish utility Vattenfall, awarded a 3.99 million euro (US$5.28 million) contract to Alstom Hydro to refurbish generator Unit 2 at the 68-MW Naverede hydroelectric project in Indalsalven, Sweden.
Work includes supplying a new stator, rotor, brushless excitation system, and closed cooling system. The work is similar to that performed on Unit 1 by Alstom in 2003. The unit is to be completed by December 2009.
The run-of-river plant is part of Vattenfall’s renovation program for many of its hydropower stations commissioned in the 1950s and 1960s.