Cross Border Energy Trade by Bhutan. By Gem Tshering, BPC

Transcription

1 Cross Border Energy Trade by Bhutan By Gem Tshering, BPC

2 Outline of the Presentation: Salient geographical features of Bhutan Hydropower Development in Bhutan Power Supply & Demand Transmission Network Present Transmission Works Future Transmission Works Other Projects Other Issues

3 Salient geographical features of Located in the Eastern Himalayas Area 38,394 sq. km Forest cover 80.89% (Excluding Shrubs: 70.46%) Population 6,34,982 (2005 Census) (700,000 by 2011) Altitude range from meters above mean sea level Stretch of 170 km north to south and 300 km east to west Climate generally 4 seasons (Spring, Summer, Autumn, and Winter) Religions: Buddhism, Hinduism Bhutan:

4 Hydropower Development in Bhutan: Total Hydro Power Potential = 30,000 MW (Techno- Economically Feasible : 24,000 MW) Total Installed Hydro Generation Capacity = 1488 MW (from 28 power plants sizes ranging 8 kw to 1020 MW) First hydropower plant of 360 kw built in 1967 in Thimphu (Capital)

5 Hydropower Development in Bhutan (Contd.): First CDM (Clean Development Mechanism) micro hydro (Chendebji) 70 kw commissioned in August 2005 Remaining to be developed = 71 large sites that have been identified ( 22,280 MW) 10,000 MW hydropower generation capacities to be developed by 2020.

6 Power Supply & Demand: Electricity export - About 75% of the generation Annual export estimate = 7, MU (2010) Revenue from sale of electricity contributes to 40% of national revenue. Bhutan s consumption + losses = 1, MU (2010)

7 Existing Major Hydropower Plants Sl. No. Name of Hydropower Plant (HP) (HP): Year of commissioning Installed Capacity (MW) Average Annual Generation in MU 1 Chhukha HP ,024 2 Basochhu HP - Upper Stage 3 Kurichhu Basochhu HP - Lower Stage 5 Tala HP ,020 4,865 6 Mini/Micro Total 1,488 7,869

8 Power Plants in pipeline by 2020 Sl. Installed Construction River Basin Project Name No. Capacity (MW) Period 1. Punatsangchhu Punatsangchhu-I Mangdechhu Mangdechhu Punatsangchhu Punatsangchhu-II Bumthangchhu Chamkharchhu-I Drangmechhu Kuri Gongri Drangmechhu Kholongchhu Amochhu Amochhu (Dorokha) Nikachhu Nikachhu Dagachhu Dagachhu CDM Punatsangchhu Sankosh Wangchhu Wangchhu Wangchhu Bunakha Total MW 10,174

9 Existing Transmission Network in Bhutan Length of 400 kv D/C lines km Length of 220 kv D/C lines km Length of 220 kv S/C lines km Length of 132 kv S/C lines km Length of 66 kv S/C lines km Length of 66 kv D/C lines km Length of 66 kv M/C lines km Total Transmission Line Length km

10 Existing Transmission Substation in Sl. No. Bhutan Substation Qty (Nos.) Capacity (MVA) /220/66kV substation /66kV substation kV substations kV substations kV substations kV Switching Station 1 - Total

11 Present Transmission Works: Transmission works completed recently: 220 kv S/C from Rurichhu to Tsirang km 132 kv S/C line from Tingtibi to Yurmoo km 132kV S/C from Deothang to Rangia km 66 kv Yurmoo to Trongsa km and 66 kv Yurmoo to Bumthang km

12 Present Transmission Works(Contd.): Transmission Lines under construction: 400kV D/C Transmission line from Punatshangchhu to Lhamoizingkha- 2 x 86 km 220kV D/C Transmission line from Dagachhu, Tsirang to Jigmeling km 220kV D/C Transmission Line from Malbase-Samtse- 43kms 132 kv D/C East-West Link from Lodrai to Jigmeling 12 km 66kV S/C Transmission Line from Samtse to Sipsu- 35km 66kV S/C Transmission Line from Samtse to Gomtu- 15km

13 Present Transmission Works(Contd.): Substations under construction: 220/132kV substation at Jigmeling 220/66kV substation at Tsirang

14 Present Transmission Works(Contd.): Transmission Line & substation construction under NIT/Limited bidding: 132/33kV substation at Yurmoo (Trongsa)

15 Proposed Tx. Network by 2020

16 Future Transmission Works: 400 kv line from Mangdechhu to Jigmeling via Goling pooling station 400 kv line from Punatshangchhu-II to Jigmeling 66kV line from Pangrizampa,Thimphu to Damji,Gasa

17 Future Transmission Works (Contd.): 400 kv lines from 2500 MW Sunkosh HEP to Alipurduar 400 kv line from Amochhu/Torsa Projects to Siliguri (new Binnaguri) pooling station 220/66/33 kv substation at Dhamdhum Industrial Estate (Samtse) 66/33 kv substation at Sipsu (Samtse)

18 OPGW & ADSS Interlinking Other Projects: - Live line replacement of existing ground wire with OPGW in 220kV Transmission Lines between Thimphu and Phuentsholing: 86kms (completed) - Live line replacement of existing groundwife with OPGW in 132kV & 66kV Transmission Lines: kms (completed) - All Dielectric Self Supporting (ADSS) Optical fibre cables on BPC distribution poles at 33kV & below: 1290 kms (ongoing) National Load Dispatch Centre ERP Implementation

19 Other Projects (Contd.) : BPC plans to replace all the ground wire of 66 kv and above lines with OPGW.

20 Other Issues: Other possible Business Associations : Mini/Micro Hydro project Long Term Turn-key Project Association Long Term O&M association Live Line and Technical Know-how Transfer Continuous need-based Personnel Interaction / Training

21 Future expansion as per SATURN: CHINA NEPAL BHUTAN INDIA INDIA BANGLADESH

22 Power Export Present Scenario Surplus Power exported to India at mutually agreed rates Interconnections at 132kV through Gelephu Salakati (India) & Motanga Rangia (India) Interconnections at 220kV through Chhukha & Malbase Birpara (India) Interconnection at 400kV through Tala & Malbase Siliguri (India)

23 Policy Framework Power Export Hydropower Policy-2008 in place for Hydropower Development Umbrella Agreement with GoI (Power Purchase Agreements for export of Surplus Power) Internal and External Wheeling Mechanisms through respective prevalent norms / specific agreements Future Power Pooling efforts

24 Inter-Connections in future Power Export 400kV Lhamoizingkha Alipurduar (India) 400kV Jigmeling Alipurduar (India) 400kV AC / HVDC from Sankosh Alipurduar (India) 400kV AC / HVDC at Yangbari Jigmeling - Alipurduar (India) or Yangbari - Baranagar (India)

25 Power Export Tariff Mechanism Inter-Governmental Umbrella Agreements for export of Surplus Power Project Cost Basis with energy loss considering pro-rated line lengths Net energy concept for each billing cycle

26 THANK YOU