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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.

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Presentation on theme: "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."— Presentation transcript:

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 Located in the Indian Ocean to the south of Indian sub-continent Latitude 5-10 N Longitude 79-82 E 65, 525 km 2 Tropical climate :

3 Economic and electricity related indicators for Sri Lanka 20042005 Mid year population (millions)19.519.7 GDP per capita (USD/person)1,0301,197 GDP real growth rate (%)5.46.0 Access to electricity (%)73.474.9 Installed Capacity (MW)21002300 Maximum Demand (MW)15631746 Electrical Energy Generation (GWh)80438770 System Energy Losses (%)17.117.2 Per Capita Elec. Consumption (kWh/person)348369

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 1918 - First project proposal by local engineer D.J. Wimalsurendra 1926 - Construction of Laxapana started 1950 - Laxapana stage I (3 x 8.33 MW) commissioned

8 First hydro power plant in Sri Lanka Laxapana project started in 1940s 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)251950 Inginiyagala (2 x 2.475, 2 x 3.15) 11.251954 Old Laxapana Stage II (2 x 12.5)251958 Wimalasurendra (2 x 25)501965 Udawalawe (3 x 2)61969 Smanala (2 x 37.5)751969 New Laxapana (2 x 50)1001974 Ukuwela (2 x 20 )401976 Bowatenna (1 x 40)401981 Canyon unit 1 (1 x 30)301983

18 Time sequence of the development of hydro power.. Capacity / (MW)Year commissioned Victoira (3 x 70)2101984 Kotmale unit 1 (1 x 67)671985 Randenigala (2 x 61)1221986 Kotmale Unit 2&3 (2 x 67)1341988 Nillambe (2 x 1.6)3.21988 Canyon Unit 2 (1 X 30)301989 Rantambe (2 x2 4.5)491990 Samanalawewa (2 x 60)1201992 Kukula Ganga (2 x 35)702003

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 Peak demand supplier Future Economic regulator Frequency controller

22 Hydro and thermal installed capacity 1969 - 2005

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 Broadlands35 MW Uma Oya 150 MW Moragolla27 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 II2 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 1996 90 MW (48 sites) connected by April 2006 280 GWh supplied by mini hydro plants in 2005 (= to 3% of total electricity generated)

29 Mini/Micro hydro development …

30 Problems experienced

31 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 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 … http://www.ceb.lk


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