Diapositiva 1

1
EO-Hydro Market review meeting Overview on
Scandinavia
2
Content

• The Nordic power market
• Customer base
• Report on customer feedback
• Lesson learnt in commercial trials of 2005
• Recommendation for modifications of the service

3
The Nordic Power Market

• The physical power consumption in the Nordic
  power market is around 390 TWh per year.
• The price of power for this consumption is
  directly or indirectly determined by the Nordic
  power exchange, Nord Pool, where electricity
  produced from hydropower, wind power, nuclear
  energy, gas and coal is traded.
• The prices at Nord Pool are in turn influenced by
  prices at the power exchanges in Continental
  Europe, which are in turn influenced by prices in
  other markets.

4
Customer base Scandinavia

• Current EO-hydro customer portfolio
• Glommens and Laagens Water Management
  Association
• BKK
• Statkraft
• Service provider
• Kongsberg Satellite Services

5
GLB Water Management Association

• Develop and operate storage reservoirs so that
  the production of electricity can be better
  adapted to the actual demand.
• GLB is responsible for 26 reservoirs and
  watercourse diversions with a combined storage
  capacity of an approximate 3,500 million m3,
  equivalent to 16 of the runoff from the
  catchment area during an average year.
• The catchment area is Glomma and Laagen rivers
  (41,200 km2). It covers 13 of Norway's total
  land area, equivalent to the size of Denmark.

6

• GLB catchment in south-eastern Norway
• Vast areas at lower altitudes

7
BKK

• BKK one of Norway's largest companies in the
  production, wholesaling and transmission of
  electrical power.
• BKK owns 29 own power stations.
• BKK is owned by Statkraft and 17 local
  municipalities in Western Norway.
• 171.000 network customers
• 29 own power stations
• 45 transforming stations in the central and
  regional grids
• 4,890 network stations in the distribution
  network
• Produces approx. 8 TWH a year

8

• Leading company in Europe
• 39 hydropower in Scandinavia
• 17 of hydropower in Europe

• total power production 42 TWh,
• third largest producer of power in the Nordic
  region,
• second largest producer of power based on
  renewable energy sources in Europe.
• the group has 2,000 employees (subsidiaries
  included)

Source www.statkraft.com
9
Statkraft in the Nordic countries

• Statkraft has more than 60 power stations with
  related regulation facilities across Norway.
• Many of the more than 120 reservoirs are located
  at high elevations and the catchment areas cover
  extensive mountain areas.
• Statkraft has recently purchased 24 power
  stations in Sweden and Finland.

10
EO-Hydro activities in 2005

• Statkraft received optical, SAR and multisensor
  satellite snow cover maps.
• Concentrated on the following four points
• Prepare the in-house system for reception of snow
  info products
• Retrieve snow information products via EO-HYDRO
  Service
• Inspect and assure quality of products before
  operational use in water management process
• Take advantage of synergy effects from combining
  EO-HYDRO products with other available
  information on snow
• The in-house system was set up with separate
  server areas for receiving the EO products. A
  simple file structure where used.
• The files were joined into the GIS system, where
  it was further analysed.

11
Snow reservoir status

• A number of activities that contribute to
  Statkraft's overview of the snow situation.
• The data collected by the met.no and the NVE are
  obtained via internet and the amount of snow in
  all mountain basins is calculated throughout the
  winter with the use of hydrological models
• However, most important information source are
  the manual measurements that are carried out in
  the catchment areas during the winter season
  according to fixed measurement plans.
• During melting periods the snowmelt process in
  the mountain areas is monitored as described with
  the help of satellite data and an in-house
  computer system. This gives Statkraft maps and
  snow data for the entire country at short notice
  when conditions make it possible to download
  satellite data.

12
HBV - Hydrological model

• The original HBV model was developed in 1975 by
  the Swedish Meteorological and Hydrological
  Institute (SMHI) as a conceptual runoff model
• Original intention a model for operational
  forecasting in Scandinavia
• Works well in many locations around the world and
  covers a variety of climate conditions
• The parameters in the HBV model are calibrated to
  the basin but they may not all be physically
  representative even though they are based on
  physical processes

13
HBV - Hydrological model

• All hydrological forecasts in Statkraft are based
  on the HBV model
• The forecasting system contains around 200 models
  representing basins from all over Norway and
  Sweden
• The data acquisition is based on a great number
  of automatic hydrometeorological stations in and
  around the basins
• The models are operated automatically and the
  results go, after a quality check into production
  planning and energy management models
• The forecasting model is run on a daily time step.

14
Comparison between two services

• Comparison between snow covered area (SCA) from
  the multisensor weekly products from EO-Hydro and
  the AVHRR products from SnowStar on April 24th
  for a number of basins in southern Norway.
  EO-Hydro products give a higher percentage for
  SCA than NOAA AVHRR

15
Comparison model/satellite

• The table shows comparison between EO-Hydro SCA
  and SCA from the HBV model for four basins on May
  14th.

• Total all-season runoff for Rinna (original
  modelled/corrected and actual)

16

• Modelled runoff throughout the melting season
  2005 for Rinna in central Norway. The graph show
  the original HBV modelled runoff and the HBV
  modelled runoff after update of SCA from
  satellite images

17
EO-Hydro vs. Snowstar

• EO-Hydro

• SnowStar

18
Lessons learnt

• Plus
• The web portal easy to access and manoeuvring in
  the portal was facilitated with thumbnail
  previews and a well-organised lay-out.
• Downloading a product over the internet took only
  15 seconds. This was also the case for the colour
  composites.
• Improvements were found in the composite snow
  maps
• The maps were easily imported into Statkrafts
  in-house geographical information system
• The multi sensor snow cover maps have a better
  resolution and are more geographically detailed
  than e.g. NOAA-AVHRR based maps.
• The snow cover maps presented would probably be
  effective for an overall inspection of the snow
  situation for many users without further analysis
• Minus
• Some products show considerable differences from
  the products generated by the in-house
  well-proven SnowStar system. This might be due to
  the SAR images.
• The ordering procedures not tested as Statkraft
  primarily is interested in a subscription
  arrangement is this feasible?

19
Potential service and product improvement

• Service quality
• Processing time
• More satellites (optical and radar)
• Single products in addition to multi products
• Product quality
• Need for higher accuracy in snow covered fraction
  in SAR vs MODIS
• MODIS products need to be calibrated for sun
  angle and terrain to be used in larger areas
• What about snow volume? Snow coverage information
  gives only marginal contributions

20
KO meeting for 2006 season

• Took place January 16th at Gardermoen (Statkraft,
  BKK and GLB present)
• Service
• Last year only weekly composites, we would like
  to see single products as well
• Start deliveries for the season a bit earlier
  (GLB)
• Product
• Pixels with inferred snow in SAR should be
  identifiable.
• Show snow in forest in optical (no forest mask)
• This means a larger number of products compared
  to the previous year