Lugu Pahar Pumped Storage Project (6X250) 1500 MW, Jharkhand
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Lugu Pahar Pumped Storage Project (6x250) 1500 MW, Jharkhand ANNEXURE-I LOCATION OF MAP Figure 1: Location Map Page 24 of 58 Lugu Pahar Pumped Storage Project (6x250) 1500 MW, Jharkhand ANNEXURE-II SALIENT FEATURES OF LUGU PAHAR PUMPED STORAGE PROJECT 1. LOCATION Country India State Jharkhand District Bokaro River Bokaro river a tributary of Damodar River Left Bank - 23046’30.32”, N- 850 43’45.12”E Dam Axis (Upper) Right Bank - 23˚ 46’14.4”, N- 85˚43’ 29.52”E Left Bank N- 23˚48’ 06.87” , E- 85˚ 44’ 39.47” Dam Axis (Lower) Right Bank N- 23˚47’ 34.12” , E- 85˚44’ 25.9” Access to the Project i) Kolkata- Bardhman- Durgapur-Asansol-Dhanbad Road (via NH-19)-358 km ii) Ranchi- Mesva-Ormanjihi- Kaitha- Kaju- Lalpania (90.7 km via NH-20) Airport Ranchi (107.4 km) Railhead Gomia Railway station (BG Line) (with unloading facilities) South East Railway Port Haldia, Kolkata 2. PROJECT Type Pumped Storage Project Installed Capacity 6X 250 MW (1500 MW) Peak Operating duration 6 hours daily (360,444) 3. HYDROLOGY Catchment Area Upper Dam 4.0 sq. km Lower Dam 556.0sq km Average Annual Rainfall 1364 mm Average annual Run-off Upper Reservoir 2.6 Mm3 Page 25 of 58 Lugu Pahar Pumped Storage Project (6x250) 1500 MW, Jharkhand Lower Reservoir 361.9 Mm3 Maximum Design Flood (PMF) Upper Reservoir 125 Cumec. Lower Reservoir 5088Cumec. 4.0 CIVIL STRUCTURE 4.1 UPPER RESERVOIR FRL 640.0 m MDDL 630.0 m Pondage at FRL 43.5 Mm3 Pondage at MDDL 32.7 Mm3 Live Pondage 10.8 Mm3 Reservoir surface area at FRL 1.16 km2 4.2 LOWER RESERVOIR FRL 269.0 m MDDL 262.0 m Pondage at FRL 21.3 Mm3 Pondage at MDDL 9.9 Mm3 Live Pondage 11.5 Mm3 Reservoir surface area at FRL 2.02 km2 4.3 UPPER DAM Type Rock fill with Central impervious core Top of Dam EL 644.5 m River Bed Elevation EL 540.0 m Total Length of Dam at top 660 m Max. Height of Dam 104.5m(from bed level) Top width of dam 8.0 m 4.4 LOWER DAM Type Rock fill with Central impervious core Top of Dam EL 271.5 m River Bed Elevation EL 240.0 m Total Length of Dam at top. 1078 m Max. Height of Dam 31.5 m Top width of dam 8.0 m Page 26 of 58 Lugu Pahar Pumped Storage Project (6x250) 1500 MW, Jharkhand 4.5 UPPER DAM SPILLWAY ARRANGEMENT Type Ogee Spillway (Ungated) Crest Elevation EL 640 m MWL EL 642.0m Design Flood 125 cumec No. of Bays 2 Bays , 9 m wide each 4.6 LOWER DAM SPILLWAY ARRANGEMENT Type Ogee Spillway (Gated) Crest Elevation EL 258 m MWL EL 269.0 m Design Flood 5088 cumec No. of Bays 9 Bays ,10m wide each 4.7 Power Intake Type Horizontal Type with anti-vortex lubbers H x W x No. x Line 10m x 10.5 x 3 no’s x 2 lines 4.8 Intake Structure Length 78m 4.9 Headrace Tunnel (i) Horizontal 1. Dia 8.0 m (inner dia) 2. Length 740m 3. No. of Tunnel 2 nos. 4.10 Penstock (i) Inclined/Horizontal 1. Dia 7.0 m (inner dia) 2. Length 564m 3. No. of Tunnel 2 nos. (ii) After trifurcation D x L x line D 4.1 m xL91 m x 2 lines 4.11Tailrace Tunnel 1. Dia 8.0 m (inner dia) 2. Length 900 m each. 3. No. of Tunnel 2 nos. Page 27 of 58 Lugu Pahar Pumped Storage Project (6x250) 1500 MW, Jharkhand 4.12 Tailrace Outlet Type Horizontal Type with anti-vortex lubbers H x W x No. x Line 10 .0m x 10.5m x 3 nos x 2 lines 4.13 Powerhouse Type Underground Cavern Size L 240 x W23 m x H 51 m (Four Fixed/Two Variable Speed Pump/ Turbine units) 4.14Transformer Room Type Underground Cavern L x W x H L 190 m x W 20 m x H 31m 4.15 PotheadYard Type GIS in underground cavern L x W L 150 m x W40 m 4.16 Main Access Tunnel (MAT) Type D- shaped W X H W 8.0 m x H 8.50 m 5.0 Hydro-mechanical Equipment 5.1 Intake Equipment Intake Trashrack 3 sets x 2 lines, W 10.5 m x H 10.0m Intake Maintenance Gate Vertical lift fixed wheel type steel gate 2 sets Intake Gate W 7.0m x H 8.0m Vertical lift fixed wheel type steel gate2 sets W 7.0m x H 8.0m 5.2 Steel Penstock Type of penstock Embedded type welded steel penstock Type, number of bifurcation Internal reinforced type bifurcation 2 sets Inside diameter, Before bifurcation 7 m (main pipe) After bifurcation 4.1 m (branch pipe) Total length 544 m Page 28 of 58 Lugu Pahar Pumped Storage Project (6x250) 1500 MW, Jharkhand 5.3 Draft Equipment Quantity 6 sets Type of gate High pressure slide type steel gate (Bonneted gate) with transition pipe Clear span 4.1 m Clear height 4.1 m 5.4 Tailrace Equipment Tailrace Trashrack 3 sets x 2 lines, W 10.5m x H 10.0m Tailrace Gate Vertical lift slide type steel gate 2 sets W 8.00 m x H 10.00 m 6.0 Electromechanical Equipment 6.1 Pump Turbine Type Francis type, vertical shaft reversible pump-turbine Number of unit Six (6) units Rated Turbine Head 362 m Turbine Output at Rated Head 253 MW Rated Pump Head 378 m Pump Input at Rated Head 285 MW Rated Turbine Discharge 79.00 m3/s Rated Pump Discharge 71 m3/s Synchronous Speed 333.3 rpm 6.2 Generator-Motor Type Three (3) phase, alternating current synchronous, generator-motor, vertical shaft, rotating field, enclosed housing, rim-duct air-cooled and suspended type Number of unit Six (6) units [Fixed Speed] Rated Capacity Generator; 250 MW Motor; 300 MW Rated Voltage 18.0kV Rated Frequency 50 Hz Rated Speed 333.3 rpm Over Load Capacity 110 % rated capacity Page 29 of 58 Lugu Pahar Pumped Storage Project (6x250) 1500 MW, Jharkhand 6.3 Main Transformer Type Indoor, oil-immersed, 3 single phase transformers with on-load tap changer (OLTC) for pumping operation,OFWF cooled Numbers 18 + 1 (Spares) Rated Capacity 112 MVA, Single phase Rated Voltage Primary; 18 kV Secondary; 400 kV adjustable range of the secondary voltage: -5% to +10%(3kV/tap) Connection Primary: Delta Secondary: “Y” Neutral Grounding System for Solidly Grounded Secondary Winding 6.4 Generator-Motor Circuit Breaker Type Indoor, Metal-enclosed, SF6 and single pressure type Number of Unit Eight (8) units Rated Voltage 18 kV Rated Normal Current 12,000 A Phase Reversal Equipment Three Phase, 24kV, 12000A 6.5 Gas Insulated Switchgear 6.5.1 Circuit Breaker Type 400 kV Gas Insulated Switchgear (GIS) Number of Feeder Eleven (11) feeders Rated Voltage 420 kV Rated Normal Current 2,000 A Rated Short Time (1sec) 50 kA withstand Current 6.6 400 kV XLPE Cable Type Single Core 400 kV Cross linked polyethylene insulated type Rated Voltage 400 kV Page 30 of 58 Lugu Pahar Pumped Storage Project (6x250) 1500 MW, Jharkhand Number of Circuits 4 ckts + 1 spare cable ( Total 13 Cables) 6.7 Starting Method Type 1nos. Static Frequency Converter Starting(SFC) & also Back to back starting (BTB) Capacity of Starting Transformer 2 nos.,18/19.2 kV,30 MVA and 19.2 / 18 Kv 6.8 Diesel Engine Generator Number of Unit Two (2) units Rated Capacity 1,000 kVA, 11 kV 6.9 EOT Crane Type Indoor, Electric Overhead Traveling Crane Number of Unit Two (2) units + One (1) unit Rated Capacity 2 x 300 ton (Main hoist), 80 ton and 10 ton& 1x10 ton at GIS Span 22.5 m 6.10 Transmission Line Type Double Circuit, Twin Mooze Conductors(2XD/C Lines) Capacity Voltage Level 400kV Length About 130 Km (50 Km & 80 Km) 6.11 Project Cost (Price Level August 2017) Option-1 All six Units Fixed Type Cost of Civil Works including H&M Rs. 1997.73Crores Cost of E & M Works Rs. 2166Crores IDC Rs. 822.78 Crores Total Cost of The Project Rs. 4986.51 Crores Option-2 Four Units Fixed Type + Two Units Variable Type Cost of Civil Works including H&M Rs. 2000.19 Crores Cost of E & M Works Rs. 2237.95Crores IDC Rs. 832.99 Crores Total Cost of The Project Rs. 5071.13 Crores Option-3 Three Units Fixed Type + Three Units Variable Type Cost of Civil Works including H&M Rs. 2001.47 Crores Cost of E & M Works Rs. 2302.00Crores IDC Rs. 842.63 Crores Total Cost of The Project Rs. 5146.10 Crores Page 31 of 58 Lugu Pahar Pumped Storage Project (6x250) 1500 MW, Jharkhand 6.12 Project Benefits Option-1- 6 Fixed type units S. No. Off Peak Energy Rate First Levelized Tariff (Rs/kWh) (Rs/kWh) Tariff (Rs/kWh) 1 1 4.89 4.51 2 2 6.15 5.77 3 3 7.41 7.02 Option-2- 4 Fixed type units+ 2 Variable Units 1 1 4.95 4.56 2 2 6.21 5.82 3 3 7.47 7.08 Option-3- 3 Fixed type units+ 3 Variable Units 1 1 5.01 4.61 2 2 6.27 5.87 3 3 7.52 7.13 Page 32 of 58 Lugu Pahar Pumped Storage Project (6x250) 1500 MW, Jharkhand ANNEXURE-III ANALYSIS of ALTERNATIVES 1.