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