20120726 Briefing on BAKUN HEP (Technical)
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Transcript of 20120726 Briefing on BAKUN HEP (Technical)
� Project Background
� Progress of Works
� Reservoir Impoundment
� Power Generation
� Other Benefits
IET MALAYSIA IET MALAYSIA IET MALAYSIA IET MALAYSIA ––––PRESENTATION ON BAKUN HEPPRESENTATION ON BAKUN HEPPRESENTATION ON BAKUN HEPPRESENTATION ON BAKUN HEP
13 April 2013 13 April 2013 13 April 2013 13 April 2013 Nanthagopi Velaairam
Distance : Bakun to Bintulu ~ 180 km Bakun to Miri ~ 3Distance : Bakun to Bintulu ~ 180 km Bakun to Miri ~ 3Distance : Bakun to Bintulu ~ 180 km Bakun to Miri ~ 3Distance : Bakun to Bintulu ~ 180 km Bakun to Miri ~ 300 km 00 km 00 km 00 km Bakun to Sibu ~ 390 km Bakun to Kuching ~ Bakun to Sibu ~ 390 km Bakun to Kuching ~ Bakun to Sibu ~ 390 km Bakun to Kuching ~ Bakun to Sibu ~ 390 km Bakun to Kuching ~ 900 km900 km900 km900 km
Bakun HEPBakun HEPBakun HEPBakun HEPLocated on the Btg. Balui Located on the Btg. Balui Located on the Btg. Balui Located on the Btg. Balui in the upper Rajang Basinin the upper Rajang Basinin the upper Rajang Basinin the upper Rajang Basin
PROJECT LOCATION
Bakun CatchmentBakun CatchmentBakun CatchmentBakun Catchment
PROJECT LAYOUT
Spillway
Power IntakeMain Dam
Powerhouse
Switchyard
Plunge Pool
Sg Murum Btg Balui
Dam type Concrete Faced Rockfill Dam
Max. Height above Foundation 205 m
Base Length (U/S to D/S) 580m
Crest Length 750 m
Crest Elevation EL 236.5 m
Max. Flood Level EL 234 m
Max. Operating Level EL 228.0 m(Reached on 9 March 2012)
Min. Operating Level EL195.0 m (Reached in April 2011)
Catchment Area 14,750 km2
Reservoir Area at EL 228 asl 695 km2
PROJECT MAIN FEATURES
233 mm
205 mmShuibuya
China
Bakun Malaysia
202 mm
196 m196 m
Karahjukar
Iceland
187m187m
Aquamilpa Mexico
Campos
Novos Brazil
CFRD DAMS IN THE WORLD
BATANG AIR (9,000 ha)
�BAKUN (69,500 ha)BAKUN (69,500 ha)BAKUN (69,500 ha)BAKUN (69,500 ha)
�KENYIR (39,600 ha)KENYIR (39,600 ha)KENYIR (39,600 ha)KENYIR (39,600 ha)
�MURUMMURUMMURUMMURUM (24,500 ha)
TEMENGGORTEMENGGORTEMENGGORTEMENGGOR (15,200 ha)
RESERVOIRS IN MALAYSIA
PERGAU
� The Project
� Progress of Works
� Reservoir Impoundment & Release
� Power Generation
� Other Benefits
THE PRESENTATION
PROJECT PROGRESS
PackagePackagePackagePackage ProgressProgressProgressProgress
MAIN CIVIL WORKS (MCHJV) Completed
ELECTRO - MECHANICAL I (ALSTOM) Completed
ELECTRO - MECHANICAL II (IMPSA) 95.0%
SWITCHYARD (MRCB) Completed
ELECTRO-
MECHANICAL
BEM1-C (IMPSA)
95%
ELECTRO-
MECHANICAL
ALSTOM
COMPLETED
BAKUN
HYDROELECTRIC
PROJECT
MAIN CIVIL WORKS
MCHJV
COMPLETED
RIVER DIVERSION
DONG AH (KOREA)
COMPLETED
PROJECT WORK PACKAGES
COFFERDAM
GUSB (MALAYSIA)
COMPLETED
SWITCHYARD
MRCB
COMPLETED
BIOMASS REMOVAL
WARGANA CONSORTIUM
COMPLETED
� Constructed by Dong Ah, Korea from 1996 – 2001.
DIVERSION INLET
� 3 tunnels of 12 m diameter with average length of 1.5 km.
� Currently all 3 tunnels are plugged.
DIVERSION TUNNELS
� Total discharge capacity = 7,260 m3/s.
DIVERSION OUTLET
DAM SITE CLEARING (2003)� Commencement in April 2003 under Malaysia – China Hydro JV.
Feb 2006Nov 2005
Aug 2007March 2006
July 2008 Aug 2009
17Aug’07
Jan’05 Feb’06
Oct’09
July 2008 Aug 2009
MAIN DAM
� Completed in 2009.
Upstream View Downstream View
MAIN DAM - SIDE VIEW (8 June 2009)
Intake
Powerhouse
Concrete Lined
Steel Lined
INTAKE, POWER TUNNEL & POWERHOUSE
Oct 2005 May 2006
July 2008
Feb 2009
Building Height = 65m,
Width = 58m, Length = 171m.
POWER INTAKE STRUCTURE
POWER INTAKE STRUCTURE
02 Feb 2012
POWER INTAKE – LOG BOOM�Blocking floating logs and debris.
POWER INTAKE – FLOW TRAINING LOG
� Allow withdrawal of top 10 to 15m good quality surface water.
� Blocking finer floating debris.
POWER INTAKE - TRASHRACK
Aug 2007Oct 2006
8.5m
� Concrete lined section.� Discharge capacity = 208m3/s.
POWER TUNNEL – LOW PRESSURE SECTION
Dec 2006Oct 2006
� Concrete lined section.� Vertical drop from upper elbow to lower elbow = 90m.
POWER TUNNEL - VERTICAL SHAFT
� Diameter of Tunnel = 7.0 m.
POWER TUNNEL – STEEL LINED HIGH PRESSURESECTION
� Diameter of Penstock = 4.85m.
POWER TUNNEL – PENSTOCK TO P/HOUSE
SPIRAL CASE
POWERHOUSE – SIDE VIEW
Draft Tube Gate
Tailrace Channel
POWERHOUSE – D/S VIEW� Building Height = 71m, Width = 48m, Length = 250m.
Unit 8
Unit 1
Last 2 Rotors
Unit 8
Unit 7
CURRENT POWERHOUSE INTERNAL VIEW
Draft Tube
Concreting
Stay Ring
Spiral Case
Concreting
Bottom Ring
Vanes
Runner
Distributor
Shaft
Stator + Winding
Rotor
Bus Duct
Cooling Water Floor
Turbine Floor
Control Room Floor
VAC Floor
Transformer
Generator Floor
TURBINE ERECTION SEQUENCE
Stay Ring Spiral Case (Dilatation piece diameter = 4.85m)
TURBINE & GENERATOR INSTALLATION
Pit Liner Enclosure Concreting
Turbine Runner (5.125m diameter;Francis – no inlet valve)
Guide Vanes (24 x 1.108m H)
TURBINE & GENERATOR INSTALLATION
Distributor Head Lower Shaft
Rotor (Nominal power=306MW, Nominal speed = 166.7 rpm)
Stator
TURBINE & GENERATOR INSTALLATION
Upper BracketGenerator Cover
EM1 (ALSTOM) STATUS
� All 4 turbine units completed and in commercial operation.
Unit 5
Unit 8
EM2 (IMPSA) STATUS
� Unit 4Unit generally complete
� Unit 3Stator/rotor completeTurbine generally complete
� Unit 2Stator completeRotor in progress
� Unit 1Stator / Rotor in progress
� Common ServicesElectrical services subcontract awarded
� Tentative COD Unit 4 Aug 2013Unit 3 Oct 2013Unit 2 Dec 2013Unit 1 Jan 2014
Unit 4
Unit 1
41
SPILLWAY – KEY DATA
Design DischargesDesign Flood 15,000 m3/s
1 in 10,000 year flood 13, 303 m3/s
Weir
Spillway weir crest elevation EL 209 m
Number of radial gates 4
Width of gates 15 m
Height of gates 21 m
Chutes
Width of chutes 2 x 25 m
Maximum water velocity 44 m/s
Number of aerators 4
Flip Buckets
Flip bucket radius 40 m
Estimated sweepout discharge 640 m3/s
Maximum jet throw 245 m
Plunge PoolExcavated plunge pool floor elevation EL 50 m
Estimated maximum scour depth 30m
SPILLWAY - RADIAL GATE
SPILLWAY – U/S VIEW
� Spillway Crest Level is EL 209m, current water level at EL 225.8m.
EL 209m
� Chute Length = 660m; Chute Width = 2 x 25m� Designed Flood Discharge = 15.000 m3/s� First spillway testing conducted on 4 Oct 2011.
SPILLWAY – D/S VIEW
HYDROLOGICAL & SEISMIC STATIONS
HYDROLOGICAL & SEISMIC STATIONS
SHORELINE BIOMASS REMOVAL
EL228m
EL180m
� Animal Rescue Team of Sarawak Forestry Corporation commenced rescue operation on 21st Oct 2010.
WILDLIFE MONITORING & RESCUE
� A total of 1,552 animals (48 mammal spp., 22 reptile spp. and 15 bird spp) were rescued and released at mainland (outside flooded zone).
Western Tarsier
Crested Fireback
Banded Palm Civet
Slow Loris
Porcupine
Langur
WILDLIFE RESCUE
Class Total
number of
individuals
rescued
Total
number
of
species
Number of species classified
according to WPO 1998
TOTALLY
PROTECTED
PROTECTED TRADE
BAN
NON
PROTECTED
Mammals 1419 48 6 24 6 12
Birds 47 15 2 4 9
Reptiles 86 22 7 15
TOTAL 1552 85 8 35 6 36
DETAILS OF WILDLIFE RESCUED
PLANT RESCUE – NURSERY
� More than 34,900 seedlings of tree species & 1,221 non-trees (orchids, gingers, aroids) raised in nursery.
REPLANTING� A total of 33,715 seedlings were replanted along the reservoir shoreline of permanent islands and mainland.
Num Species (Scientific name) Total number of seedlings
1 Ensurai (Dipterocarpus oblongifolius) 12,467
2 Tegelam/Engkabang terendak (Shorea
seminis) 3,154
3 Meranti putih (Shorea sp.) 1,104
4 Rengas pitoh (Swintonia sp.) 1,993
5 Meranti merah kesumba (Shorea rubra) 5,554
6 Resak (Vatica sp.) 207
7 Meranti sarang punai (Shorea parvifolia) 60
8 Engkabang jantong (Shorea macrophylla) 68
9 Binatoh (Shorea argentifolia) 5,679
10 urat mata (Parashorea sp.) 878
11 Luis (Hopea sp.) 2,551
12 Engkabang pinang licin (Shorea amplexicaulis) Dead (20)
13 Ubah (Syzygium sp.) Dead (16)
Grand TotalGrand TotalGrand TotalGrand Total 33,71533,71533,71533,715
DETAILS OF PLANT SPECIES REPLANTED
RESERVOIR CLEANING: REMOVAL OF FLOATING LOGS & DEBRIS
� Contract awarded to a local consortium on 28 Dec 2010 (2+1 yrs contract).� Reservoir cleaning commenced on 28 April 2011.
� The Project & Company
� Progress of Works
� Reservoir Impoundment & Release
� Power Generation
� Other Benefits
THE PRESENTATION
RESERVOIR IMPOUNDMENT
13th Mar2012 – EL 228.7m13th October 2010 – EL 56m(Day of Impoundment)
� Reservoir area = 695km2 (largest lake in M’sia)� Reservoir reached full supply level of EL 228m on 9 March 2012.
� Impoundment commenced on 13th Oct 2010.
RESERVOIR IMPOUNDMENT (Cont…)� Reservoir @ EL 201.7m as of 25th May 2011
RESERVOIR IMPOUNDMENT (Cont…)
� Reservoir level reached EL 208.6m on 5 August 2011.
RESERVOIR IMPOUNDMENT - THEN & NOW
�Reservoir level reached EL 228m on 9 March 2012.
RESERVOIR RELEASE� Continuous release of around 550 cumecs to enable passenger boatnavigation in between Kapit-Belaga-Bakun commenced on 11Nov2011.
RESERVOIR LOWERING
� Lowering of reservoir level started on 12.03.2012.� Maximum release of 2,800 m3/s.� Currently reservoir level at EL 225.8m.
� The Project
� Progress of Works
� Reservoir Impoundment & Release
� Power Generation
� Other Benefits
THE PRESENTATION
63
BAKUN SWITCHYARD (275KV)
� First Commissioning of Line Similajau 1 & Switchyard Diameter 5 on 13th April 2011.
COMMERCIAL GENERATION
UNIT NO COD DATE
Unit 8 6 August 2011
Unit 7 2 October 2011
Unit 5 18 December 2011
Unit 6 23 March 2012
TRANSMISSION ROUTE
Bintulu
Miri
Mambong
Matang
EngkililiBatang Ai
Kemantan
Kanowit
Mulu NP
EXISTING 275kV SESCO GRIDEXISTING 275kV SESCO GRIDEXISTING 275kV SESCO GRIDEXISTING 275kV SESCO GRID
275kV Tee275kV Tee275kV Tee275kV Tee----off Bintuluoff Bintuluoff Bintuluoff Bintulu----Miri to Similajau Miri to Similajau Miri to Similajau Miri to Similajau SubstationSubstationSubstationSubstation
TWO 275kV Double Circuit TWO 275kV Double Circuit TWO 275kV Double Circuit TWO 275kV Double Circuit Transmission Lines Transmission Lines Transmission Lines Transmission Lines
to Similajau Substationto Similajau Substationto Similajau Substationto Similajau Substation
BAKUN HEPBAKUN HEPBAKUN HEPBAKUN HEP
SIMILAJAU SIMILAJAU SIMILAJAU SIMILAJAU SUBSTATIONSUBSTATIONSUBSTATIONSUBSTATION
EXISTING 275kV SESCO GRIDEXISTING 275kV SESCO GRIDEXISTING 275kV SESCO GRIDEXISTING 275kV SESCO GRID
Maximum Installed Capacity 2,400 MW
Firm Generating Capacity 1,773* MW
Firm Annual Energy Generation 15,514 GWh
Current SEB’s Demand 550 - 700 MW
* Based on SAMA Report – Our preliminary assessment (2002 to 2010 flow data) shows
higher firm energy @ 1,872 MW.
BAKUN CAPACITY AND ENERGY GENERATION
� The Project & Company
� Progress of Works
� Reservoir Impoundment & Release
� Power Generation
� Other Benefits
THE PRESENTATION
POSITIVE IMPACT ON BAKUN
Power Generation 1. Spill way Operationa.Flood mitigation - Belaga and Sibu saved
from flooding in March & April 2012 (5 times the average flow of 1,500 cumec)
b. Regulated flow - allowing uninterrupted boat traffic - plentiful water supply
2. Dam a. Reduce hazard to downstream (block
floating logs, debris and silt - 80, 000 tonnes of logs collected)
b. Better quality water release from dam.
3. Contributing to Grid System Performance
Unit 4
HUGE RESERVOIR FOR ECO-TOURISM
Bakun Dam
� Length = 140km, Widest Zone = 6kmLength = 140km, Widest Zone = 6kmLength = 140km, Widest Zone = 6kmLength = 140km, Widest Zone = 6km
Batang Balui
Sungai Murum
Sungai LinauBatang Rajang
ISLANDS WITH POTENTIAL FOR DEVELOPMENT� 20+ big islands of total size 6,000 ha.
SCENIC SITES WITH GREAT TOURISM POTENTIAL
GOOD SPOT FOR BIRD WATCHING & FISHING
HEAVEN FOR PHOTOGRAPHER
74
21 kg Empurau caught at Bakun DT’s outlet costing > RM9,000 – Jun 2003
POTENTIAL FOR CAGE CULTURE &AGR0-TOURISM