In March 2012 ANDRITZ HYDRO - ANDRITZ Vertical volute pumps

22 HYDRONEWS New projects
▲ Powerhouse HPP Vrutok, Macedonia
Vrutok
Market entry in Macedonia
In n March 2012 ANDRITZ HYDRO
signed its first direct contract
with Elektrani Na Makedonija
(ELEM), Macedonia’s state power
producer.
Vrutok is the largest hydropower
plant in Macedonia. The HPPs Raven
and Vrben are part of the Mavrovo
system and were commissioned in
two stages: 1957/1958 and 1973 with
201 MVA installed capacity. The plant
encompasses 42% of the totally installed
hydro capacity in Macedonia.
Contracted work at HPP Vrutok include
replacement of four generators, highvoltage
cables, and a firefighting system
for generators and transformers.
Furthermore, two excitation transformers
and four electrical brakes will be
modernized, and the control and protection
system will be updated. At HPP
Raven the bearing lubrication system,
two busbars and media voltage cables
will be replaced.
Macedonia imports approximately
30% of its energy mix. Therefore one
of the most important criteria for
choosing ANDRITZ HYDRO was to
▲ Signing ceremony
meet the project`s challenging time
schedule. Finally, it was the variety of
proposed technical solutions, timing
and references which convinced ELEM
to choose ANDRITZ HYDRO during the
competitive international bidding process.
As a result, the modernization
work at HPP Vrutok is expected to increase
the plant's available production
capacity from 168 MVA to 184 MVA,
▲ HPP Raven, Macedonia
and provide up to 50 GWh/year of additional
production. It will improve efficiency
and decrease machine losses
by as much as 7 GWh/year, and will
result in savings in Co 2 emissions and
maintenance costs. The project is financed
through a loan from Germany’s
KfW and is expected to be finished in
May 2014.
Ewald Hesse
Phone: +43 50805 5 2671
ewald.hesse@andritz.com
Maksida Joldic
Phone: +43 50805 5 3928
maksida.joldic@andritz.com
TECHNICAL DATA
Output: 4 x 41.4 MW / 46 MVA
Voltage: 12 kV
Speed: 500 rpm