RESITA HYDRO PROJECT
CEZ GROUP
ROMANIAN HYDRO POWER SUMMIT 2014
20 February 2014
Project location and main parameters of Resita hydro system – refurbishment
and modernization of 4 old hydro power plants
Synoptic scheme of Resita water system
1012m a.s.l.
Semenic water chamber, HWL=996m
a.s.l
Location: Romania, west part of country,
Banat Region, Caras Severin county
Semenic channel
max 2,34mc/s
Baia
Mare
Satu
Mare
Orad
ea
ClujNapoca
Ar
ad
Timiso
ara
Resita
Ia
si
Tîrgu
Jiu
Miercur
ea
Ciuc
Drobe
taTurnu
Severi
Craio
n
va
Bras
ov
Rîmni
cu
Vîlcea
Hbr=342m
Timis Trei Ape lake
4,4mio mc
Piatra
Neamt
Tîrgu
Mures
Sib
iu
Safra channel
Semenic river
Bistri
ta
Alba
lulia
De
va
Timis Trei Ape pumping
station, 834m a.s.l.
Botos
ani
Sucea
va
Zal
au
Safra water chamber, HWL=863m
a.s.l
TTA pumps
(2x0,3mc/s)
Pite
sti
Sfîntu
Gheorg
he
Ploie
sti
Tirgovi
ste
Slati
na
Alexand
ria
Bacau
Focs
ani
Buz
au
Slobo
zia
Bucures
ti
Calar
asi
Giur
giu
Vaslui
Gal
ati
Bra
ila
Main
channel
Tulc
ea
Rankina water chamber,
HWL=464 m a.s.l.
Timis
river
Breazova water
chamber, 514m a.s.l.
Barzava
river
Superior channel
Hbr=37m
HPP Breazova, Hbr=37m, 477m a.s.l.
Pi=0,656MW, E=1,84GWh
Consta
nta
Hbr=474m
Gozna dam&lake (597m a.s.l.)
10,3 mio. mc
Hbr=75m
HPP Crainicel 1, TWL=521m a.s.l.
Pi=4,16MW, E-8,33GWh/year
HPP Crainicel 2, TWL=521m a.s.l. 521m a.s.l.
Pi=9,2MW, E=23,18GWh/year
Valiug dam &lake
0,9 mio. mc
Water pipes for
Resita municipality
Birzava river
Secu dam & lake, 300m a.s.l.
7,96mio. mc
Grebla HHP, Hbr=215m, 249 m a.s.l.
Pi=7,968MW, E=2854GWh/year
Grebla pumping station
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Refurbishment of old hydro system – main data for old technology





Resita project started with achievement from TMK Resita
(steel factory), in 2010, of existing old hydro energetic
system, in operation, located on the west part of Romania,
on Semenic Mountains. The hydro system included mainly:
 4 hydropower plants (Grebla, Crainicel1,
Crainicel 2 and Breazova);
 1 pumping station (Timis Trei Ape);
 4 dams/lakes: Gozna (10,27 millions mc), Secu
(7,96 millions mc), Valiug (0,92million mc),
Timis Trei Ape (4,4 millions mc);
 64km of channels, 12 tunnels and 4 main
metallic aqueducts;
 32km of electrical networks 6kV and 35kV, 5
transformer stations MV/MV or MV/LV.
The energy generated in old HPPs it was used by steel
factory using medium voltage network and substations;
The technology used in HPPs it was very old, the
commissioning was as follows: HPP Grebla – 1970, HPP
Crainicel 1 – 1956, HPP Crainicel 2 – 1997, HPP Breazova
– 1950.
Old system included historical monuments, most important
are the buildings(power houses) for HPP Grebla and HPP
Breazova.
Total maximum power produced by the old equipment was
around 18MW.
HPP Grebla – old transformer station 6/35kV
HPP Grebla – old equipment on machines room
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Refurbishment of old hydro system – images with old technology
HPP Breazova – Power house
(historical monument)
HPP Breazova – oldest Francis turbine,
manufactured by GANZ in 1916
HPP Crainicel 1 – Old machines room
HPP Crainicel 2 – Old machines room
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Needed for refurbishment of small hydro power plants were coming as a result of
the high degree of wear and tear of initial old equipment and risk for negative
potential environmental impact.
HPP Crainicel 2 – Works for foundation of new turbine,
generator and anchor blocks
HPP Breazova– Reinforcement steel and concrete
pouring for foundation of new turbine and generator
HPP Crainicel 1– Reinforcement steel and concrete pouring
for foundation of new turbine and generator
PS TTA – Desassembly of old technology
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Resita project – reconstruction in images
Refurbishment project was complex and was divided into eight major sections : HPP Grebla , HPP Crăinicel I, HPP Crăinicel II, HPP
Breazova , Water channels, Pumping Station Timis Three Waters (TTA) , Transformer station 6/35/110 Grebla and OHL 35 kV OHL
from hydro system and last one Connection to the national electrical distribution network 110 kV.
In May 2011 started the refurbishment project of old existing assets technology from Resita hydro system, which consist mainly in
design and execution of the replacement of existing equipment with new ones, repairs of channels, aqueducts, electrical networks
35kV and new connection to the national electrical system, including main transformer station. The design and permitting stages were
developed in 2011-2012 in parallel with the operation of old HPPs.
The hydropower plants were in operation till end of July 2012, when started the execution works, in parallel for sections HPPs, PS
Timis Trei Ape and Channels. Electrical execution works started in March 2013.
Grebla transformer station 6/35/110kV– Foundations reinforcement steel
HPP Grebla– Installing of new technology
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Refurbishment – refurbishment in images

The refurbishment works are made base on fully yellow turn-key contract, signed by CEZ Romania with
Hydropol;
The main stages of this project were:
Disassembly of old machines;
Carrying out construction works necessary for assembly of new equipment;
Installation of new equipment;
Testing and commissioning of new equipment.
Effectively execution of the work began in July 2012 based on Building Permits obtained, by disassembling old
machinery. Complex tests started in October 2013 and first coupling of new generators were in November 2013. All
new generators were ready for continuous operation in first part of December 2013, as it was planned.
HPP Grebla – Penstocks and anchors blocks refurbishment
HPP Grebla – Dispatcher control room
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Refurbishment of Resita hydro system – new technology in operation
The new equipment installed in the 4 small HHPs (Grebla, Crainicel I, Cranicel II and Breazova) meet high performance criteria and
include turbines, generators and transformers, GIS module, electric cells and automation panels, automated equipment for water
cleaning and were produced by companies with experience in domain from countries like Germany, Italy and Norway.
The general contractor of the work collaborated with Romanian companies throughout the project, supporting local economic
development environment. Also, one of the major advantages of refurbishment for the community is the direct link to the National
Energy System for Brebu Nou and Garana villages and reserve supply for the area Valiug - Semenic Mountain.
Following the commissioning of new equipment, total installed power in the 4 hydro power plants increased from 18 to 22MW and
confirmed increased efficiency of production of hydro power (about 20%), and an improved level of environmental protection.
Al hydro system is leaded on SCADA from Grebla dispatching (control) room and from Craiova DED 110kV for local electrical grid.
End of refurbishment and modernization works was registered in December 2013 and fully commercial operation in January 2014
Grebla transformer station 6/35/110kV – connection with SEN
HPP Grebla– Works finished
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Refurbishment of Resita hydro system – new equipment ready for operation
HPP Crainicel 2 – New technology installed
HPP Breazova– New turbine and generator installed
HPP Crainicel 1– Final stage of refurbishment
Channels – New steel gates installed and channel refurbished
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BACK - UP
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Refurbishment of Resita hydro system – technical parameters of HPPs
Unit
Discharge
(mc/s)
Design Head
(m)
Turbine type
Rotation (RPM)
Generator
type
Generator active
power (kW)
Estimated yearly
net energy
generated
(GWh)*
HPP Grebla – G1
1,5
209,7
Francis
horizontal
1000
Synchronous,
6kV
2640
9,45
HPP Grebla –G2
3
209,4
Francis
horizontal
750
Synchronous,
6kV
5328
19,09
4,5
-
-
-
-
7968
28,54
2
67,8
Francis
horizontal, 2
units
750
Synchronous,
6kV
1280
5,29
HPP Crainicel 1
Safra head
0,8
236,3
Pelton vertical,
6 jets
1000
Synchronous,
6kV
1600
3,04
HPP Crainicel 1
4,8
-
-
-
-
4160
8,33
HPP Crainicel 2
2,43
451
Pelton vertical,
6 jets
750
Synchronous,
6kV
9200
23,18
Breazova – Francis
2,24
34,6
Francis
horizontal
600
Synchronous,
6kV
656
1,84
-
-
-
-
-
21.984
61,88
HPP Grebla
HPP Crainicel 1 –
Gozna head (2 units)
TOTAL HPPs
units
*) Source: Hydropol CZ, General Contractor
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THANK YOU FOR YOUR ATTENTION!
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