1. RESITA HYDRO PROJECT CEZ GROUP
April 23, 2017
RESITA HYDRO PROJECT CEZ GROUP
ROMANIAN HYDRO POWER SUMMIT 2014
20 February 2014

2. Project location and main parameters of Resita hydro system – refurbishment and modernization of 4 old hydro power plants
Birzava river
Valiug dam &lake
0,9 mio. mc
Semenic channel
max 2,34mc/s
Timis Trei Ape pumping station, 834m a.s.l.
Safra channel
Hbr=342m
Hbr=474m
Gozna dam&lake (597m a.s.l.)
10,3 mio. mc
HPP Crainicel 1, TWL=521m a.s.l.
Pi=4,16MW, E-8,33GWh/year
HPP Breazova, Hbr=37m, 477m a.s.l.
Pi=0,656MW, E=1,84GWh
Timis Trei Ape lake
4,4mio mc
Grebla HHP, Hbr=215m, 249 m a.s.l.
Pi=7,968MW, E=2854GWh/year
Main channel
Secu dam & lake, 300m a.s.l.
7,96mio. mc
Grebla pumping station
Water pipes for Resita municipality
Superior channel
Rankina water chamber, HWL=464 m a.s.l.
Safra water chamber, HWL=863m a.s.l
HPP Crainicel 2, TWL=521m a.s.l. 521m a.s.l.
Pi=9,2MW, E=23,18GWh/year
Semenic water chamber, HWL=996m a.s.l
1012m a.s.l.
Timis river
Semenic river
Breazova water chamber, 514m a.s.l.
Hbr=37m
Synoptic scheme of Resita water system
Location: Romania, west part of country, Banat Region, Caras Severin county
TTA pumps (2x0,3mc/s)
Timisoara
Arad
Oradea
Satu Mare
Alba lulia
Bistrita
Tîrgu Jiu
Deva
Drobeta- Turnu Severin
Suceava
Botosani
Iasi
Vaslui
Sibiu
Zalau
Miercurea Ciuc
Rîmnicu Vîlcea
Brasov
Pitesti
Sfîntu Gheorghe
Slatina
Focsani
Galati
Buzau
Ploiesti
Slobozia
Calarasi
Giurgiu
Alexandria
Braila
Tirgoviste
Tulcea
Tîrgu Mures
Piatra Neamt
Bacau
Resita
Baia Mare
Cluj-Napoca
Constanta
Craiova
Bucuresti
Barzava river
Hbr=75m

3. 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

4. Refurbishment of old hydro system – images with old technology
HPP Breazova – Power house
(historical monument)
HPP Crainicel 1 – Old machines room
HPP Breazova – oldest Francis turbine,
manufactured by GANZ in 1916
HPP Crainicel 2 – Old machines room

5. potential environmental impact.
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 Crainicel 1– Reinforcement steel and concrete pouring for foundation of new turbine and generator
HPP Breazova– Reinforcement steel and concrete pouring for foundation of new turbine and generator
PS TTA – Desassembly of old technology

6. 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 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

7. 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 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

8. 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

9. Refurbishment of Resita hydro system – new equipment ready for operation
HPP Crainicel 2 – New technology installed
HPP Crainicel 1– Final stage of refurbishment
HPP Breazova– New turbine and generator installed
Channels – New steel gates installed and channel refurbished

10. BACK - UP

11. 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
750
5328
19,09
HPP Grebla
4,5 -
7968
28,54
HPP Crainicel 1 – Gozna head (2 units) 2
67,8
Francis horizontal, 2 units
1280
5,29
HPP Crainicel 1 Safra head
0,8
236,3
Pelton vertical, 6 jets
1600
3,04
HPP Crainicel 1
4,8
4160
8,33
HPP Crainicel 2
2,43
451
9200
23,18
Breazova – Francis
2,24
34,6
600
656
1,84
TOTAL HPPs units
21.984
61,88
*) Source: Hydropol CZ, General Contractor

12. THANK YOU FOR YOUR ATTENTION!