U.P. Rajya Vidyut Utpadan Nigam Ltd. (Jal Vidyut Unit)

A U.P. Government Enterprises

Rihand

Rihand Power Station
Pipri, District : Sonebhadra, Uttar Pradesh


Installed capacity - 300 MW (6x50MW)







Sailent Features

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 Dam
  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 erection bay floor : 683 ft Elevation : 684 ft
  Elevation of gen floor: 663 ft Elevation of erection bay floor : 683 ft
  Elevation of turbine floor : 650 ft  
06 - Head : 143 ft to 250 ft Max. discharge capacity from penstock : 93.77 cumecs
07 - Installed capacity : 300 MW (6x50 MW)
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 ft
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
09 - Type of generator with excitation system
Type of generator -- Vertical shaft salient pols umbrella type.
  Excitation System -Static Excitation System, Mae - BHEL  
  A. Excitation Transformer  
(a) Type Dry Cast Resin
(b) Make AMES
(c) Connection DYN5
(d) Rating 965 KVA
(e) Voltage 11000Volts/380 Volts
(f) Frequency 50 Hzs.
  B. SEE (Static Excitation Equipment) DVR
10 - Details of Tailrace
  Average tailrace water level : 632 ft
 
Firm Power : 105 MW, Annual energy : 912 million kwh  
11 - Details of Switchyard
  BUS SYSTEM Two Bus System- Main Bus & Reserve Bus
  Bus Voltage 132000 volts
  Number of bays 26
  Number of incomer 6 machine, Breaker - SF-6
  Bus coupler : 1 No. Breaker- SF-6
  Number of feeders 132 kv- 20 Nos 33kv - 4 Nos. 11kv- 3 Nos.
Name of feeder (132kv) (20 Nos)
(a) Anpara - I & II , Breaker - SF-6  
(b) Obra hydel - I & II, Breaker - SF-6  
(c) Grasim- I & II Breaker - SF-6  
(d) Robertsganj - I & II , Breaker - SF - 6  
(e) Aluminium (Hindalco) - I, II & III, Breaker - SF-6  
(f) Garhwa Road - I Breaker - SF-6  
(g) Nagar Untari - I Breaker - SF-6  
(h) Obra Thermal - I, Brekaer - SF-6  
(i) Kota (NTPC, Singrauli)- I, Breaker - SF-6  
(j) Birla Carbon (Hi- Tech )-I Breaker - SF-6  
(k) Railway Feeder-I Breaker - SF-6  
(l) Bus Coupler -I Breaker - SF-6  
(m) 132/33 KV 40 MVA Transformer- I Breaker - SF-6  
(n) 132/33 KV 10 MVA Transformer- I Breaker - SF-6  
Name of feeder (33kv)(04Nos)
(a) Nadhira Feeder -I Breaker VCB  
(b) Kanhar feeder-1 Breaker VCB  
(c) New Pipri -1 Breaker VCB  
(d) New Dudhi-1 Breaker VCB  
Name of feeder (11kv)(03Nos)
(a) Turra feeder-1  
(b) Colony feeder-1  
(c) New Vikash feeder-1  
Gen. transformer -6 No.
(a) GT Make-Transformers &rectifiers(India )ltd -2 Nos.  
Rating 67.5 MVA
Voltage 11KV/132 KV
TYPE of cooling OFWF
Phase 3
Vector group YNd11
(b) GT Make-EMCO Ltd. -1 No.  
Rating 67.5 MVA
Voltage 11KV/132 KV
TYPE of cooling OFWF
Phase 3
Vector group YNd11
(c) GT MAKE-SHIRDI SAI ELECTICALS Ltd. - 3 Nos.  
Rating 67.5 MVA
Voltage 11KV/132 KV
TYPE of cooling OFWF
Phase 3
Vector group YNd11
Unit transformer- 6 Nos. + 2 Nos. Station  
Rating - 500 KVA, 3 Phase, 50 Hz, 11kv/0.415kv  
Step down transformer
  1) 132/33 KV, 40 MVA, TRANSFORMER Make-Accurate Transformers ltd - 1 No.  
  Rating 24000/40000KVA
  Voltage 132/33 KV
  TYPE of cooling ONAN/ONAF
  Phase 3
  Vector group YNyn0
  2) 132/33 KV, 10 MVA, TRANSFORMER MAKE-lepper - 1 No.  
  Rating 6000/10000KVA
  Voltage 132/33 KV
  TYPE of cooling ON/OB
  Phase 3
  Vector group Yyn0
  3) 33/11, KV 10 MVA, TRANSFORMER MAKE-EAST INSIA UDYOD LTD - 1 No.  
  Rating 10000KVA
  Voltage 33KV/11KV
  TYPE of cooling ON/AN
  Phase 3
  Vector group Dyn11
  4)33/11 KV, 3 MVA, TRANSFORMER make-the general electric co of India ltd - 1 No.  
  Rating 3000kva
  Voltage 33kv/11kv
  TYPE of cooling ON
  Phase 3
  Vector group Dyn11
   Project Cost Rs. 51.52 Crores
Unitwise Details of Machines
  (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 :BHEL, 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., MSL
  (h) Max. probable reservoir level 886 ft. MSL
  (i) Max. possible reservoir level 890.80 ft. MSL
  (j) Dead storage level 775 ft MSL
  (k) Average tailrace water level 632 ft. MSL
DAM
  (a) Name Rihand
  (b) Type Cement concerete, straight gravity
  (c) Length 3065 ft
  (d) Height 300 ft
  (e) Deepest foundation level 590 ft. MSL
  (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