Workshop on Sharing of Experience in Development of Hydro Power Projects

Transcription

1 Workshop on Sharing of Experience in Development of Hydro Power Projects 30 th - 31 st October 2006, India W.R. Asanka Perera Deputy General Manager Mahaweli Hydro Power Complex Ceylon Electricity Board Sri Lanka

2 Sri Lanka Located in the Indian Ocean to the south of Indian sub-continent Latitude 5-10 N Longitude E 65, 525 km 2 Tropical climate :

3 Economic and electricity related indicators for Sri Lanka Mid year population (millions) GDP per capita (USD/person) 1,030 1,197 GDP real growth rate (%) Access to electricity (%) Installed Capacity (MW) Maximum Demand (MW) Electrical Energy Generation (GWh) System Energy Losses (%) Per Capita Elec. Consumption (kwh/person)

4 Importance of hydro to Sri Lanka Only Source of indigenous energy in appropriate size Lowest cost generation

5 Road map for presentation Hydro potential and development up to now Changing role of hydro power in Sri Lankan power system Future development directions Problems experienced Government policy on hydro development

6 Hydro potential and development up to now

7 Potential and development Potential Available 2000 MW Developed 1207 MW Historical Development First project proposal by local engineer D.J. Wimalsurendra Construction of Laxapana started Laxapana stage I (3 x 8.33 MW) commissioned

8 First hydro power plant in Sri Lanka Laxapana project started in 1940 s Completed in 1950

9 Sri Lankan river basin system and hydro power stations Four major river basins Kelani Mahaweli Kalu Walawe

10 Historical development Kelani river basin Exploited mainly 1950 to 1970 Laxapana complex 335 MW Mahaweli river basin Development 1979 to 1990 Mahaweli complex 660 MW Other hydro potential Walawe, Kalu river basins 1990 to 2003 Some other small rivers Other hydro complex 211 MW Mini/Micro hydro systems

11 Kelani river basin power stations (335 MW)

12 Mahaweli river basin power stations (660 MW)

13 Mahaweli river basin power stations Kotmale (3 X 67 MW)

14 Mahaweli river basin power stations Victoria (3 X 70 MW)

15 Mahaweli river basin power stations Randenigala (2 X 61 MW)

16 Mahaweli river basin power stations Ukuwela (2 X 20 MW)

17 Time sequence of the development of hydro power Capacity / (MW) Year commissioned Old Laxapana Stage I (3 x 8.33) Inginiyagala (2 x 2.475, 2 x 3.15) Old Laxapana Stage II (2 x 12.5) Wimalasurendra (2 x 25) Udawalawe (3 x 2) Smanala (2 x 37.5) New Laxapana (2 x 50) Ukuwela (2 x 20 ) Bowatenna (1 x 40) Canyon unit 1 (1 x 30)

18 Time sequence of the development of hydro power.. Capacity / (MW) Year commissioned Victoira (3 x 70) Kotmale unit 1 (1 x 67) Randenigala (2 x 61) Kotmale Unit 2&3 (2 x 67) Nillambe (2 x 1.6) Canyon Unit 2 (1 X 30) Rantambe (2 x2 4.5) Samanalawewa (2 x 60) Kukula Ganga (2 x 35)

19 Changing role of hydro power in Sri Lankan power system

20 Hydro component of system energy demand : Present, future energy demand (8769 GWh ) << capacity (4400 GWh) average wet year approx 1/2 energy demand very wet year (5661) cannot meet the energy demand ii

21 The changing role for Hydro Generation Past Supply total peak demand energy demand Present Future Peak demand supplier Economic regulator Frequency controller

22 Hydro and thermal installed capacity

23 Sri Lankan power system Total Capacity 2411 MW Hydro 1207 MW Thermal 548 MW Wind 3 MW IPP Thermal 567 MW IPP small Hydro 86 MW

24 Future development directions

25 Future Developments Hydro potential available 2000 MW More than 50 % already developed Remaining potential Gin Ganga 49 MW Broadlands 35 MW Uma Oya 150 MW Moragolla 27 MW

26 Another option Expansion of existing hydro power plants Especially for peaking duty Some candidates Victoria (stage II) 3 x 70 MW Smanalawewa stage II 2 x 60 MW New laxapana 72.5 MW Polpitiya 23.2 MW

27 Mini/Micro hydro development Master plan study (1988) 80 MW (200 sites) 8 MW from irrigation tanks Intermediate Technology Development group study (1999) Estimated another exploitable small hydro potential of 100 MW 250 sites

28 Mini/Micro hydro development First mini hydro plant in MW (48 sites) connected by April GWh supplied by mini hydro plants in 2005 (= to 3% of total electricity generated)

29 Mini/Micro hydro development

30 Problems experienced

31 Problems experienced Upper Kotmale project Delayed more than 10 years 20% energy reduction to exclude the tapping of some water falls Upper Kotmale and Kukula project Energy reduction due to not using the potential for reservoir type

32 Government policy on hydro development

33 Government policy on hydro development Development of hydro power generation to its full potential All large scale hydro power generation under Government control Mini hydro plants under private sector development Energy generated is purchased through power purchase agreement with Ceylon Electricity Board

34 Thank you