20120726 Briefing on BAKUN HEP (Technical)

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Project Background Progress of Works Reservoir Impoundment Power Generation Other Benefits IET MALAYSIA IET MALAYSIA IET MALAYSIA IET MALAYSIA – PRESENTATION ON BAKUN HEP PRESENTATION ON BAKUN HEP PRESENTATION ON BAKUN HEP PRESENTATION ON BAKUN HEP 13 April 2013 13 April 2013 13 April 2013 13 April 2013 Nanthagopi Velaairam

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Transcript of 20120726 Briefing on BAKUN HEP (Technical)

Page 1: 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

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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

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PROJECT LAYOUT

Spillway

Power IntakeMain Dam

Powerhouse

Switchyard

Plunge Pool

Sg Murum Btg Balui

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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

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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

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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

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� The Project

� Progress of Works

� Reservoir Impoundment & Release

� Power Generation

� Other Benefits

THE PRESENTATION

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PROJECT PROGRESS

PackagePackagePackagePackage ProgressProgressProgressProgress

MAIN CIVIL WORKS (MCHJV) Completed

ELECTRO - MECHANICAL I (ALSTOM) Completed

ELECTRO - MECHANICAL II (IMPSA) 95.0%

SWITCHYARD (MRCB) Completed

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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

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� Constructed by Dong Ah, Korea from 1996 – 2001.

DIVERSION INLET

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� 3 tunnels of 12 m diameter with average length of 1.5 km.

� Currently all 3 tunnels are plugged.

DIVERSION TUNNELS

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� Total discharge capacity = 7,260 m3/s.

DIVERSION OUTLET

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DAM SITE CLEARING (2003)� Commencement in April 2003 under Malaysia – China Hydro JV.

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Feb 2006Nov 2005

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Aug 2007March 2006

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July 2008 Aug 2009

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17Aug’07

Jan’05 Feb’06

Oct’09

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July 2008 Aug 2009

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MAIN DAM

� Completed in 2009.

Upstream View Downstream View

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MAIN DAM - SIDE VIEW (8 June 2009)

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Intake

Powerhouse

Concrete Lined

Steel Lined

INTAKE, POWER TUNNEL & POWERHOUSE

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Oct 2005 May 2006

July 2008

Feb 2009

Building Height = 65m,

Width = 58m, Length = 171m.

POWER INTAKE STRUCTURE

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POWER INTAKE STRUCTURE

02 Feb 2012

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POWER INTAKE – LOG BOOM�Blocking floating logs and debris.

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POWER INTAKE – FLOW TRAINING LOG

� Allow withdrawal of top 10 to 15m good quality surface water.

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� Blocking finer floating debris.

POWER INTAKE - TRASHRACK

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Aug 2007Oct 2006

8.5m

� Concrete lined section.� Discharge capacity = 208m3/s.

POWER TUNNEL – LOW PRESSURE SECTION

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Dec 2006Oct 2006

� Concrete lined section.� Vertical drop from upper elbow to lower elbow = 90m.

POWER TUNNEL - VERTICAL SHAFT

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� Diameter of Tunnel = 7.0 m.

POWER TUNNEL – STEEL LINED HIGH PRESSURESECTION

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� Diameter of Penstock = 4.85m.

POWER TUNNEL – PENSTOCK TO P/HOUSE

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SPIRAL CASE

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POWERHOUSE – SIDE VIEW

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Draft Tube Gate

Tailrace Channel

POWERHOUSE – D/S VIEW� Building Height = 71m, Width = 48m, Length = 250m.

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Unit 8

Unit 1

Last 2 Rotors

Unit 8

Unit 7

CURRENT POWERHOUSE INTERNAL VIEW

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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

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Stay Ring Spiral Case (Dilatation piece diameter = 4.85m)

TURBINE & GENERATOR INSTALLATION

Pit Liner Enclosure Concreting

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Turbine Runner (5.125m diameter;Francis – no inlet valve)

Guide Vanes (24 x 1.108m H)

TURBINE & GENERATOR INSTALLATION

Distributor Head Lower Shaft

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Rotor (Nominal power=306MW, Nominal speed = 166.7 rpm)

Stator

TURBINE & GENERATOR INSTALLATION

Upper BracketGenerator Cover

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EM1 (ALSTOM) STATUS

� All 4 turbine units completed and in commercial operation.

Unit 5

Unit 8

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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

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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

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SPILLWAY - RADIAL GATE

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SPILLWAY – U/S VIEW

� Spillway Crest Level is EL 209m, current water level at EL 225.8m.

EL 209m

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� 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

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HYDROLOGICAL & SEISMIC STATIONS

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HYDROLOGICAL & SEISMIC STATIONS

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SHORELINE BIOMASS REMOVAL

EL228m

EL180m

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� Animal Rescue Team of Sarawak Forestry Corporation commenced rescue operation on 21st Oct 2010.

WILDLIFE MONITORING & RESCUE

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� 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

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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

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PLANT RESCUE – NURSERY

� More than 34,900 seedlings of tree species & 1,221 non-trees (orchids, gingers, aroids) raised in nursery.

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REPLANTING� A total of 33,715 seedlings were replanted along the reservoir shoreline of permanent islands and mainland.

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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

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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.

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� The Project & Company

� Progress of Works

� Reservoir Impoundment & Release

� Power Generation

� Other Benefits

THE PRESENTATION

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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.

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RESERVOIR IMPOUNDMENT (Cont…)� Reservoir @ EL 201.7m as of 25th May 2011

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RESERVOIR IMPOUNDMENT (Cont…)

� Reservoir level reached EL 208.6m on 5 August 2011.

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RESERVOIR IMPOUNDMENT - THEN & NOW

�Reservoir level reached EL 228m on 9 March 2012.

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RESERVOIR RELEASE� Continuous release of around 550 cumecs to enable passenger boatnavigation in between Kapit-Belaga-Bakun commenced on 11Nov2011.

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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.

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� The Project

� Progress of Works

� Reservoir Impoundment & Release

� Power Generation

� Other Benefits

THE PRESENTATION

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BAKUN SWITCHYARD (275KV)

� First Commissioning of Line Similajau 1 & Switchyard Diameter 5 on 13th April 2011.

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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

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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

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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

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� The Project & Company

� Progress of Works

� Reservoir Impoundment & Release

� Power Generation

� Other Benefits

THE PRESENTATION

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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

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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

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ISLANDS WITH POTENTIAL FOR DEVELOPMENT� 20+ big islands of total size 6,000 ha.

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SCENIC SITES WITH GREAT TOURISM POTENTIAL

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GOOD SPOT FOR BIRD WATCHING & FISHING

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HEAVEN FOR PHOTOGRAPHER

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21 kg Empurau caught at Bakun DT’s outlet costing > RM9,000 – Jun 2003

POTENTIAL FOR CAGE CULTURE &AGR0-TOURISM

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