Potential for large scale exchange

Transcription

1 International workshop January 2011 Exchange of balancing services between the Nordic and the Central European synchronous systems Potential for large scale exchange Kjell Erik Stensby NVE - Section for Resources

2 Balancing Capacity It is stated that the demand for exchange of balancing capacity will increase due to rapid expansion of unregulated renewable energy Storage alternatives types, capacity, flexibility, cost Many storage techniques are under development A possible Norwegian contribution: - The reservoirs in the hydro power system The reservoir capacity gives possibilities for: - Increasing capacity (installation) in existing power plants - Establish pump storage plants between existing reservoirs 2

3 The Norwegian Battery 3

4 The Norwegian Hydro Power System Installed capacity : 29,600 MW Mean production capacity: TWh/year Mean utilization time: 4,200 hours (mean annual production divided by capacity) Reservoir capacity: 85 TWh (62 bill. m 3 ) Reservoir energy capacity is about 70% of mean production capacity Approximately 50% of total hydro power reservoir capacity in Europe 4

5 NVE s role (one of many) NVE is a Directorate under the Norwegian Ministry of Petroleum and Energy NVE is not an owner of Power Plants NVE has an overall overview of developed HP and potential for new installation and production Input of data to the Ministry (and others) The power companies may have more detailed plans for new capacity but not all of them are known externally 5

6 An estimate of potential for increased capacity in existing HP plants Criteria for selection: Size of current installation (> 50 MW) Reservoir capacity Outlet Sea Reservoir Large lake River with possible new tailrace to sea, reservoir or lake 89 existing power plants with a current total capacity of 17,000 MW and mean annual production 66.4 TWh satisfied the given requirements 6

7 Remarks The estimation is carried out by a simple screening based on NVE s data base Using 2000 hours as new utilzation time for each power plant. This gives the new total capacity, and thereby the increase Not included: Technical solutions beyond some general considerations Costs Environmental impacts Transmission Market 7

8 Results - 1 Type of outlet Number Capacity Prod. Utilization Reservoir New total Increase 2000 h MW TWh Hours % MW MW > 50 MW Possible" , Outlet to Reservoir , Sea , Lake , River , h

9 Results - 2 Regions Number Capacity Prod. Utilization Reservoir New total Increase MW TWh hours % MW MW > 50 MW Possible" Region East South West Middle North

10 A more detailed study Five (six) existing power plants are evaluated Technical solutions and cost estimates Environment concerns and transmission capacity to a minor degree only Utilization time 2500, 2000, 1500 and 1000 hours 10

11 Results - 1 (1500 hours) Power Plant Capacity Production Utilization Increase Cost Name MW GWh hours MW MNOK/MW Guolas Aurland I Blåsjø Mauranger Tonstad Solhom

12 Results 2 (1500 hours) Power Plant Reservoir Discharge Contribution Reservoir Capacity Name mill. m 3 m 3 /s m 3 /s days Guolas Aurland I Blåsjø Mauranger Tonstad Solhom

13 Tonstad HPP Capacity: 960 MW Production: 4,070 GWh/år Outlet to reservoir (Sirdalsvatn 32 mill. m 3, 419 km 2 ) License application: Additional 960 MW Also pumping 1500 h: 2710 MW Intake reservoir 55.6 mill. m 3 Upstream power plant: Solhom Reservoir capacity: 274 mill. m 3 Design discharge/capacity to be increased (300 MW) with 1500 hours in Tonstad 13

14 Tonstad Hydro Power Plant 14

15 Pump storage possibilities in Norway Pump power plants between existing reservoirs Today in Norway: Seasonal pump storage There is a potential for short time pump storage NVE has so far initiated a simple investigation (cases, potential), which is the first step of a more comprehensive study Statkraft has carried out an investigation (south Norway) Results are depending on: - Limitation in change of water level in reservoirs - Duration of the pumping/production periods (cyclus) 15

16 An indicative potential Potential for increased capacity (conventional power plants; increased capacity in existing hydro power plants) Potential for pump storage power plants Potential for combinations Total rough estimate: 20,000 MW within 2030 should be possible, but.. The solutions and results will depend on many factors a national and a multinational challenge for the years to come 16

17 Thanks for your attention! 17