RESITA HYDRO PROJECTCEZ GROUP

20 February 2014

ROMANIAN HYDRO POWER SUMMIT 2014

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Project location and main parameters of Resita hydro system – refurbishment and modernization of 4 old hydro power plants

Birzava river

Valiug dam &lake0,9 mio. mc

Semenic channelmax 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 lake4,4mio 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

Hbr=75m

Barzava river

TTA pumps (2x0,3mc/s)

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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 equipment on machines room

HPP Grebla – old transformer station 6/35kV

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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 ofthe 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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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.

Resita project – reconstruction in images

Grebla transformer station 6/35/110kV– Foundations reinforcement steel

HPP Grebla– Installing of new technology

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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.

Refurbishment – refurbishment in images

HPP Grebla – Penstocks and anchors blocks refurbishment HPP Grebla – Dispatcher control room

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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

Refurbishment of Resita hydro system – new technology in operation

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 installedHPP Crainicel 1– Final stage of refurbishment

HPP Breazova– New turbine and generator installed 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

UnitDischarge

(mc/s)

Design Head (m) Turbine type Rotation (RPM)

Generator type

Generator active power (kW)

Estimated yearly net energy generated

(GWh)*

HPP Grebla – G1 1,5 209,7Francis

horizontal1000

Synchronous, 6kV

2640 9,45

HPP Grebla –G2 3 209,4Francis

horizontal750

Synchronous, 6kV

5328 19,09

HPP Grebla 4,5 - - - - 7968 28,54

HPP Crainicel 1 – Gozna head (2 units)

2 67,8Francis

horizontal, 2 units

750Synchronous,

6kV1280 5,29

HPP Crainicel 1 Safra head

0,8 236,3Pelton vertical,

6 jets1000

Synchronous, 6kV

1600 3,04

HPP Crainicel 1 4,8 - - - - 4160 8,33

HPP Crainicel 2 2,43 451Pelton vertical,

6 jets 750Synchronous,

6kV9200 23,18

Breazova – Francis 2,24 34,6Francis

horizontal600

Synchronous, 6kV

656 1,84

TOTAL HPPs units

- - - - - 21.984 61,88

*) Source: Hydropol CZ, General Contractor

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THANK YOU FOR YOUR ATTENTION!