Rihand Power Station
Pipri, District : Sonebhadra, Uttar Pradesh
Installed capacity - 300 MW (6x50MW)
No. of units - 6
| 01 | Location |
i- about 165 km from Varanasi ii- about 150 km from Mirzapur iii-about 55 km from Obra |
| 02 | Name of River | Rihand |
| Name of Dam | Rihand | |
| Name of reservoir | Govind Ballav Pant Sagar | |
| Catchment area | 5148 sq miles | |
| 03 - Details of Intake Structure | ||
| Number | 6 | |
| Size of gates | 15.20 ft x 27.15 ft | |
| Intake structure Bottom | 701 ft | |
| Top | 860 ft | |
| Trash Rack | 6 Nos of 4 assemblies, 9.5ft x 14ft | |
| 04 - Details of water conductor system | ||
| Penstock length | 6 x 60 ft | |
| Dia of penstock | 16 ft (each) | |
| CL of penstock inlet | 734.49 | |
| Pen stock operating gallery | 6ftx 8ft at 683.67 ft | |
| 05 - Details of power house & Control room | ||
| Power House | Control Room | |
| Length 420 ft | Length : 80ft.6 inch | |
| Width 86ft.6 inch | Width : 27ft. 5inch | |
| Elevation of gen floor: 663 ft | Elevation : 684 ft | |
| Elevation of erection bay floor : 683 ft | ||
| Elevation of erection bay floor : 683 ft | ||
| 06 - Head : 143 ft to 250 ft Max. discharge capacity from penstock : 93.77 cumecs | ||
| 07 - Installed capacity : 300 MW (6x50 MW) Number of units : 6 | ||
| 08 - Type of turbine with details of governing system | ||
|
Type of turbine : Francis Make : English Electric Output at 199ft net head : 70000 BHP Max. Output at net head of 224 and higher : 77000BHP speed : 150 RPM Max runaway speed : 273 RPM Guide vane pitch circle dia : 14ft 4 inch |
Guide vane height : 3ft. 4.5 inch Spiral inlet dia : 15 ft. 3-13 /16 inch Runner inlet dia : 11ft 2-1/2 inch Runner exit dia : 12 ft 4-9/16 inch Governor oil operating pressure : 270 - 300 lb/sq. inch Governor oil pump motor : 30 HP., 1450 RPM |
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| 09 - Type of generator with excitation system Type of generator -- Vertical shaft salient pols umbrella type. | ||
| 10 - Excitation System. | ||
| (a) | Type wound | Shunt wound self excited |
| (b) | Max. Continuous rating | 286 KW |
| (c) | Nominal Voltage | 360 volts |
| (d) | Ceiling voltage | 380 volts |
| (e) | Rate of excitation response | 1 |
| (f) |
Field current for full load of generator at
Main Generator Main excitor |
0.9 pf & 12.1 kv 925 Amps 24 Amps |
| 10 - Details of Tailrace | ||
|
Average tailrace water level : 632 ft Max. probable tail water level : 675 ft (spillway design flood) Max. possible tail water level : 680 ft |
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| Firm Power : 105 MW, Annual energy : 912 million kwh | ||
| 11 - Details of Switchyard | ||
| Generating voltage | 11000 volts | |
| Transmitting Voltage | 132000 volts | |
| Number of bays | 23 | |
| Number of incomer | 6 machine, Breaker - SF-6 | |
| Bus coupler : 1 No. | Breaker- MOCB | |
| Number of feeders | 132 kv- 14 Nos 33kv - 1 No. 11kv- 4 Nos | |
| Name of feeder (132kv) | ||
| (a) Anpara - I & II , Breaker - SF-6 | ||
| (b) Obra hydel - I & II, Breaker - MOCB | ||
| (c) Kanoria factory - I, Breaker - MOCB | ||
| (d) Robertsganj - I & II , Breaker - SF - 6 | ||
| (e) Aluminium (Hindalco) - I, II & III, Breaker - SF-6 | ||
| (f) Sonenagar (Bihar) - I Breaker - SF-6 | ||
| (g) Sonenagar(Jharkhand) - II, Breaker - ABCB | ||
| (h) Obra Thermal - I, Brekaer - SF-6 | ||
| (i) Kota (NTPC, Singrauli)- I, Breaker - SF-6 | ||
| Gen. transformer -6 No. | Unit transformer- 6 Nos. + 2 Nos. Station | |
|
Make - ASEA, SWEDEN Type - Oil immersed water cooled with forced oil circulation Rating - 60 MVA, 3 phase, 50 Hz., 132 / 11kv |
Rating - 500 KVA, 3 Phase, 50 Hz, 11kv/0.415kv | |
|
10 MVA Transformer : 2 Nos, Make - Lapper,132 kv / 33 kv 5 MVA Transformer : 1 Nos. 33 kv / 11 kv 3 MVA Transformer : 2 Nos, 33 kv / 11 kv |
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| (xiii) Project Cost | ||
| Total project cost | Rs. 51.52 Crores | |
| Capital cost at the end of 2001-2002 | Rs. 5151.72 lacs | |
| O&M cost and other cost, 2001-2002 | Rs.1513. 1778 lacs | |
| Unitwise Details of Machines as per name Plate | ||
| (a) Turbine | (b) Generator | |
|
Make and type : English Electric, Francis type Number : 6 O/P at best efficiency & 225 ft rated head : 70000 HP Head : 143 ft to 250 ft Speed : 150 RPM |
Make & Type : English Electric, vertical shaft salient pole umbrella type Number : 6 Out put : 55500 KVA Power factor : 0.9 Lagging Voltage : 11 KV, 3 phase, 50c/s |
|
| Details of Reservior | ||
| (a) Name of reservoir : | Govind Ballav Pant Sagar | |
| (b) Catchment area | 5148 sq. miles. | |
| (c) Area submerged at full reservoir level | 180 sq. miles | |
| (d) Gross storage capacity | 86,00,000Ac-ft | |
| (e) Live Storage capicity | 72,00,000 Ac-ft | |
| (f) Dead storage capacity | 13,20,000 Ac-ft | |
| (g) Normal full reservoir level | 880 ft., S.M.L | |
| (h) Max. probable reservoir level | 886 ft. S.M. L. | |
| (i) Max. possible reservoir level | 890.80 ft. S.M.L | |
| (j) Dead storage level | 775 ft S.M.L | |
| (k) Average tailrace water level | 632 ft. S.M.L | |
| DAM | ||
| (a) Name | Rihand | |
| (b) Type | Cement concerete, straight gravity | |
| (c) Length | 3065 ft | |
| (d) Height | 300 ft | |
| (e) Deepest foundation level | 590 ft. S.M.L. | |
| (f) Elevation of road way at the top | 894.5 ft | |
| (g) Base width at max. section | 203 ft | |
| (h) Top width | 24 ft | |
| (i) Volume of concrete in dam | 20000000 Cubic ft | |
| (j) Total cement required | 350,000 Ton | |
| Package of RM & LE Work of Rihand Hydel Project | ||
| Package no.1 | ||
|
(a) Suply, erection & commissioning of stator soil, core, field coils, &
Unit 1,2,3,5 & 6surge ring
( F/H class insulation) CT, PT for GT cubicals, overhauling/ modification of CO2 system and ventilation system. (Supply, erection & commissioning) |
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(b) Static excitation system (c) Supply, erection and commissioning of Governor oil pumps (e) Idler Valves for governing oil system (f) HP lubrication oil system for thrust bearing (g) Centralized grease lubrication (h) Overhauling of Governor oil coolers (i) Overhauling of breaking and jacking system (j) Overhauling of cooling water system (k) T & P item for erection & commissioning |
Unit 1to 6 Unit 1to 6 Unit 1to 6 Unit 1to 6 Unit 1to 6 Unit 1to 6 |
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| Package no. -2 | ||
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(a) Repair of under water parts viz runner, guide vane, cleaning, repairing and epoxy
painting of penstock. spiral casing and draft tube steel liner |
Unit 1 to 6 | |
| (b) Reapair /replacement of EVPV (emergency valve & plug valve) Motor & its erection & laying of new cable for remorte operation | Unit 1 to 6 | |
| (c) Painting of penstock up to the intake gate to spiral casing | Unit 1 to 6 | |
| (d) Overhauling of EOT cranes and replacement of cable | ||
| (e) Replacement of dewatering pumps. | ||
| Package no. -3 | ||
| 1. Laying and termination | ||
| (a) | Supply of control cable ( 2,4,6,10 & 16 core) (Switchyard) | 1 job |
| (b) | Supply laying and termination of power cables | 1 to 6 |
| i. Supply, erection and commissioning of new static protection for machine | 1 job | |
| ii. Supply and commissioning of new alarm/annunciation system (control room) | 1 to 6 | |
| iii. Supply and commissioning of Digital instruments for control/Turbine panel | Unit 1 to 6 | |
| iv.SCADA system for P.H. (for computerization and automation) | Unit 1 to 6 | |
| (c) | Supply of Energy Meters of 0.2 accuracy | All units and feeders |
| 2. | ||
| (a) | Supply, erection and commissioning of 500 Ah battery set for P.H. | 2 nos. |
| (b) | Supply, erection and commissioning of Battery charger | 2 nos |
| (c) | Supply, erection and commissioning of distribution boards for above | 1 no. |
| Package no. -4 | ||
| Capital overhauling of entake gate, draft tube gate and their hoisting arrangement. | ||
| Package no. -5 (Switchyard Equipment) | ||
| Package no. -6 | ||
| (a) | 11/132 KV Transformer (67.5 MVA) complete with multifyre projection system. | 6 nos |
| (b) | Auxiliary Transformer 500 KVA | 6 nos |
| (c) | Overhauling of centralized centrifuging syste (G.T)for main transformer. | |