NEDRE-RØSSÅGA SHF conference

Enhancing existing Hydropowerplant facilities

April 9-11, 2014

Roald NILSEN, project manager

Statkraft at a glance

2

Pérou

Chili

Norvège

UK

Suède

Finlande

Turquie

Brésil

Zambie

Allemagne

Inde Sri Lanka

Philippines

Laos

Népal

Total capacity

17 000 MW

97,2 % renewable energy

23 countries

Generation

60 TWh

Panama

Albanie

Thailande

Vietnam

France

Location, Installation and Production

3

In the middle of Norway Close to the arctic circle Lower Røssåga, 250 MW 1950 GWh/year, 6 Francis units Upper Røssåga, 160 MW 950 GWh/year, 3 Francis units

Basic Characteristics

Average operation Lower Røssåga of 7.300h / year

Design flow Upper Røssåga larger than design flow

Lower Røssåga

Narrow tunnels / high head losses in waterways

Equipment partly worn out

Some ageing Civil constructions

Increased precipitations > 10 %

Green Certificates

4

Refurbishment alternatives

Improved efficiency:

Improvements in waterways and turbines are main contributers.

Electrical equipments are marginal contributers, but will normally also have to

be considered due to age and increased turbine output.

Alternatives for Lower Røssåga:

1. Enlarging cross sections of tunnels and increasing capacity of old units in

existing Power Plant (+10 %)

2. Refurbish all units in existing Power Plant without capacity increase

3. Refurbish 3 units in existing Power Plant and construction of a new

Power Plant with capacity increase about 100 MW (+40 %)

5

New license needed

Tunnels and Intake area

6

New intake

Upstream

Downstream

Details of Waterways, Existing Power Plant

7

New power plant Old power

plant

Detail of Waterways, New Power Plant

8

New power plant Old power

plant

Waterways, total system

9

New power plant Old power

plant

Turbine 2, in existing Power plant. Increase in efficiency and output

Efficiency and maximum output at net head of 238 m

Guaranteed and measured values after refurbishment

10

Turbine 4 efficiency, before and after refurbishment

11

Turbine efficiency, New Power Plant, 225 MW

12

Røssåga, Tunneling 1950 and 2014 Environmental aspects

13

Røssåga Outlet 1950 - 2014 Environmental aspects

14

Røssåga River Environmental aspects 1950 – 2014

15

www.statkraft.com

THANK YOU

16