Transcript WBPDCL ENVIRONMENT AND ENERGY CONCLAVE2011 26TH AUGUST-2011 A.K.Ghoshal Director(Projects),WBPDCL COUNTRY'S INSTALLED CAPACITY (MW) AS ON 30-06-11 COAL 96,743.38 GAS 17,706.35 THERMAL OIL TOTAL HYDRO NUCLEAR RENEWABLE ENERGY SOURCES TOTAL INSTALLED CAPACITY 1,199.75 GAS 10% COAL 54.66% OIL 0.67% 115649.48 38,106.40 HYDRO 21% 4,780.00 18,454.52 NUCLEAR 2.70% RENEWABL E ENERGY SOURCES 10.42% 1,76,990.40 SOURCE:CEA.

WBPDCL
ENVIRONMENT AND ENERGY CONCLAVE2011
26TH AUGUST-2011
A.K.Ghoshal
Director(Projects),WBPDCL
COUNTRY'S INSTALLED CAPACITY (MW)
AS ON 30-06-11
1
COAL
96,743.38
GAS
17,706.35
THERMAL
OIL
TOTAL
2
HYDRO
3
NUCLEAR
4
RENEWABLE
ENERGY
SOURCES
TOTAL INSTALLED CAPACITY
1,199.75
GAS
10%
COAL
54.66%
OIL
0.67%
115649.48
38,106.40
HYDRO
21%
4,780.00
18,454.52
NUCLEAR
2.70%
RENEWABL
E ENERGY
SOURCES
10.42%
1,76,990.40
SOURCE:CEA
CAPACITY ADDITION IN 11TH PLAN TARGET & ACHIEVEMENTS
TARGET &
ACHIEVEMENTS
HYDRO
(MW)
THERMAL
(MW)
NUCLEAR
(MW)
TOTAL
11TH PLAN (2007-12)
TARGET
15627.00
59693.00
3380.00
78700.00
REVISED 11TH PLAN
TARGET AFTER MTA OF
PLANNING
COMMISSION
8237.00
50757.00
3380.00
62374.00
CAPACITY ADDITION IN
11TH PLAN (30.06.11)
3452.63
29634.00
880.00
33966.63
SOURCE:CEA
For an ideal power generating
system the conventional Storage
Hydro Projects , in the grid with
sufficient installed capacity can
share the peak load and base
load can be shared by thermal
plants. If storage hydro potential
is not available then the other
alternative is pumped storage
project or gas based project.
If the thermal power stations
are to share both base and peak
load then the power system
becomes unstable with
frequency excursions
Moreover the thermal plants in
such conditions have to run at
very low load for prolonged
period needing fuel oil support
and thus cost of generation
become too high
With wide range of Frequency
variation, the industrial units
consumer as well as thermal
power units run their plants with
risk and hazards of damage,
their efficiency and life
expectancy reduce drastically
and the total power system
become unstable with risk of grid
collapse.
When natural gas is not
available in the vicinity the cost
of pipe line to carry gas from a
distance place or importing
liquid gas become prohibitive.
The Pumped Storage Project
then become the only and an
ideal solution
Pump Storage Project Plant
manages the ENERGY
of a system by using surplus
ENERGY of nuclear or thermal
power plant to pump up water
late at night and produces
ENERGY
during peak demand
when there is scarcity of
ENERGY
Highlights
Installed capacity
Number of units
Single output
900 MW
Four (4) units
225 MW

The Project was initially conceived and planned by WBSEB

Pre-feasibility report completed in 1980 (prepared by M/s.
DCPL and Harza Engg. Co., USA)

Detailed investigations done during 1980 – 91

DPR prepared by EPDC/ WAPCOS during July 1992

Project approval By:
Central Electricity Authority - 31 July 1992
Environmental Clearance -13 October 1993
Planning commission - 28 February 1994

The Project is under implementation with funding assistance
from Japan Bank for International Cooperation (JBIC), Japan
erstwhile Overseas Economic Cooperation Fund (OECF),
Japan

Loan Agreements for the Project between JBIC and Govt. of
India signed on 28 February 1995 and 31 March 2004


Upper Reservoir
High water level
EL.516.00 m
Low water level
EL.494.00 m
Available draw down 22.0 m
Full water capacity 16,404,924 m3
Available capacity
13,371,025 m3
(used about 6 hour
by 600m3/s )
Lower Reservoir
High water level
EL.337.00 m
Low water level
EL.300.00 m
Available draw down 37.0 m
Full water capacity 17,253,036 m3
Available capacity
14,475,571 m3
(used about 6 hour
by 600m3/s )
Headrace Intake Tunnel 7.70 m dia. x 2 nos.
Penstock
7.70 ~ 7.30 m dia. x 2 nos.
4.30 m dia. x 4 nos
Tailrace
8.70 m dia. x 2 nos
5.60 m dia. x 4 nos
Sedimentation rate
9.50 Cum/SqKm./Year
SWITCHYARD
TAILRACE
OUTLET
TRANSFORMER
CAVERN
ACCESS
TUNNEL
CABLE
TUNNEL
INTAKE
ACCESS TO UPPER
PENSTOCK
POWER HOUSE
LOWER DAM
SPILLWAY
Pump-Turbine
Francis type, vertical shaft reversible pump-turbine
Number of unit : 4 units
Static head
Maximum :
Normal :
Minimum :
216.0 m
186.0 m
157.0 m
Turbine
Net head
Max. 214.5 m by 1 unit
Nor. 177.0 m by 2 units
Min. 149.4 m by 2 units
Max discharge at
Normal head
:150 m3/s
Turbine output
At max head
: 260,000 kW
At normal head
: 233,800kW
At min head
: 177,600 kW
Revolving speed
: 250rpm
Direction of rotation Counter clockwise viewed from top
Pump
Net pump head
Max. 218.8 m by all units
Min. 161.0 m by one(1) unit
Pump discharge
At min pump head :141.0 m3/s
At max pump head :87.0 m3/s
Max pump input
:240,400 kW
Revolving speed
:250 rpm
Direction of rotation :Clockwise viewed from top
Generator-Motor
Type
Three phase, alternating current synchronous
generator/motor, vertical shaft, rotating field, enclosed
housing, rim duct air-cooled, semi-umbrella type
Number of unit
: Four (4) units
Generator
Operating duty
: Continuous
Rated capacity
: 250,000 kVA
Over load capacity (110%) : 275,000 kVA
Rated voltage
:16.5 kV
Rated current :8,748 A
Power factor
:0.9 lagging Frequency
: 50 Hz
Revolving speed 250 rpm
Direction of rotation : Counter clockwise viewed from
top
Motor
Operating duty
:Continuous
Rated capacity
:255,000 kW
Rated voltage
:16.5 kV
Rated current
:9,546 A
Power factor
:0.95 leading
Frequency
:50 Hz
Revolving speed :250 rpm
Direction of rotation: Clockwise viewed from top
Main Power Transformer
Indoor Type, special three phase, oil-immersed,
forced-oil, forced-water-cooled type with on-load
tap changer
Number of transformer
Four (4) units
Rated capacity 280,000 kVA
Rated voltage
Primary 16.5 kV
Secondary 400 kV -5%+10%
Frequency
50 Hz
Connection Primary Delta Secondary Wye
Neutral grounding system for secondary
Winding Solidly grounded
Indoor Type ,Oil operated, SF6 gas filled
type
Number of unit Four (4) sets
Rated capacity 24 kV
Rated normal current : 11,000 A
Rated short-circuit
breaking current
: 63 kA
Circuit Breaker SF6 gas filled
Number of circuit breaker :
Rated voltage
:
Rated normal current
:
Rated short-circuit
breaking current
:
type
Nine (9) sets
420 kV
2,000 A
40 kA (2 sec)
Disconnecting Switch and Earthing Switch
Number of unit
: Fifty-two (52) sets
Rated voltage
: 420 kV
Rated normal current
: 2,000 A
400 kV XLPE Cable
Number of circuit
Rated voltage
: Four (4) ccts
: 400 kV
Conductor size
: 630 sq mm
Maximum continuous
current
:810 A
Upper Reservoir
Lower Reservoir
High Water Level
EL.516.00m
Low Water Level
EL.494.00m
Trip level by Pump
EL.516.00m (0m)
Alarm level by Pump
EL.515.00m (-1.0m)
Alarm level by Turbine
EL.495.00m (+1.0m)
Trip level by Turbine
EL.494.00m (0m)
High Water Level
EL.337.00m
Low Water Level
EL.300.00m
Trip level by Turbine
EL.337.00m (0m)
Alarm level by Turbine
EL.336.00m (-1.0m)
Alarm level by Pump
EL.301.00m (+1.0m)
Trip level by Pump
EL.300.00m (0m)
When the water level reaches alarming water level, operators shall report the
Load Dispatching Center and stop operating units immediately.
This power station has following five modes of operation.
 Generating Operation (G)
 Pumping Operation (M)
 Synchronous Condenser Operation in Generating Direction
(SG)
 Synchronous Condenser Operation in Pumping Direction
(SM)
 Line Charging Operation (CH)
cont…..
 Among the above operating modes, the ‘Pumping’ and ‘Synchronous Condenser
Operation in Pumping Direction’ is started by means of SFC starting method
which can start four main units in series or is operated by means of back-to-back
starting method
 In the back-to-back starting method, either of No.2 and No.3 unit is used for
generator and the remained three (3) units are pump-started

All transfers among the operation modes are bi-directional except for
“PUMPING” to “SYNC. COND. OPERATION IN PUMPING” as follows
GENERATOR
SERVICE
SYNCHRONOUS
CONDENSER
OPERATION IN
GENERATING
DIRECTION
STANDSTILL
PUMP
SERVICE
LINE
CHARGING
SYNCHRONOUS
CONDENSER
OPERATION IN
PUMPING
DIRECTION
STANDSTILL

Meeting Peak Power Demand

System Frequency Control

System Voltage Control

Emergency Standby
Unit
Synchronized on
COD on
First ( Unit No. IV )
13th July’07
10th October’07
Second ( Unit No. III )
15th August’07
12th November’07
Third ( Unit No. II )
09th November’07
06th February’08
Fourth ( Unit No. I )
17th December’07
31st January’08
Generator Capacity
4 X 225 = 900 MW
Motor Capacity
4 X 255 = 1020 MW
Full load operation in the Generating mode
6 hours per day
Cycle Efficiency
75.5%
Auxiliary Consumption
0.5%
Transformation Loss
0.5%
Planned Outage
10 days
Maximum Annual Energy Generation considering 6 hours run of the
Generator and 10 days planned outage
[( 365 – 10 ) X 6 ] X 900 X 103 X 10-6
= 1917 MU
Annual Auxiliary Consumption @ 0.5% on 1917 MU
9.58 MU
Annual Energy available after Auxiliary Consumption
1907.42 MU
Annual Transformation Loss @ 0.5% on 1907.42 MU
9.53 MU
Maximum Annual Energy available after considering all Losses
1897.89 MU
Annual Energy requirement for Pumping
1917 / 0.755 = 2539.07 MU
Annual Auxiliary Consumption @ 0.5% on 2539.07 MU
12.69 MU
Annual Energy requirement after Auxiliary Consumption
2551.76 MU
Annual Transformation Loss @ 0.5% on 2551.76 MU
12.75 MU
Annual Pumping Input
2564.51 MU
OVERALL PLANT EFFICIENCY :
74%

Energy Sent and Received during 2007-08
Total Energy Sent = 384.6348 M U
Total Energy Received = 499.8744 MU
Overall Efficiency (actual) = 76.95 %

Energy Sent and Received during 2008-09
Total Energy Sent = 669.825 M U
Total Energy Received = 859.6152 MU
Overall Efficiency (actual) = 77.92 %

Energy Sent and Received during 2009-10
Total Energy Sent = 868.3542 M U
Total Energy Received = 1113.7662 MU
Overall Efficiency (actual) = 77.97 %

Energy Sent and Received during 2010-11
Total Energy Sent = 878.8824 M U
Total Energy Received = 1131.444 MU
Overall Efficiency (actual) = 77.68 %

373.16 Ha Non-forest land was transferred to the
Department Equivalent quantum of Forests,Govt. of
West Bengal for compensatory afforestation.

WBSEB/WBSEDCL also released fund of 41.8 Million
Rupees for the purpose of compensatory afforestation
to the forest Department, Govt. of West Bengal.

WBSEB/WBSEDCL have returned back reclaiming
prime forest land of 113.945 Ha to the forest
department after completion of construction work of
the project.

The action Plan is under process.

By improved irrigation facility after completion of Purulia
Pumped Storage Project Dams.

This has a good effect towards the up-gradation of the
different Medical facilities and improvement in the existing
Local Primary Health centre.

Due to awakening of social consciousness of the guardians
towards the education of their children, number of school
going students is increased within the local area. Schools
have also upgraded themselves.

The site at Bagmundi has huge potential of tourism in near
future and this has helped in economic up-liftment
afforestation of local people.





No R&R needed for the project
No habitation submerged
No villages/buildings affected.
No family affected
No historical or cultural monument
affected
UPPER
DAM
SWITCHYARD
POWER HOUSE
LOWER
DAM
UPPER
DAM
INTAKE
GATE
SHAFTS
TOWNSHIP
SWITCHYARD
Thank You