It is a vocational training report on DVC Hydel project. In Maithon, Dhanbad.

1. TRAINING REPORT
ON
DAMODAR VALLEY ORPORATION
UNIVERSITYINSTITUTEOFTECHNOLOGY
•HABIB MOLLAH
(2011-6029)
•SANCHAYITA DAS
(2011-6010)
Mr. KALLOL ROY
(H.O.D OF ELECTRICAL ENGG)

2. WHAT IS DVC ?
DVC (Damodar Valley Corporation)a legacy to the people of
India, emerged as a culmination of attempts made over a whole
century to control the wild and erratic Damodar river. The river
spans over an area of 24,235 km2 covering the states of
Jharkhand (Dhanbad, Bokaro, Hazaribagh, Koderma, Giridih,
Chhatra, Palamau, Rachi, Lohardaga and Doomka) & West
Bengal (Burdwan , Hooghly, Howrah, Bankura and Purulia).

3. OBJECTIVES/PURPOSE :
 FLOOD CONTROL.
 IRRIGATION.
 WATER SUPPLY- INDUSTRIAL AND DOMESTIC.
 NAVIGATION & DRAINAGE.
 GENERATION, TRANSMISSION AND DISTRIBUTION OF ELECTRICAL
ENERGY.
 AFFORESTATION AND CONTROL OF SOIL EROSION.
 PROMOTION OF PUBLIC HEALTH, AGRICULTURE, INDUSTRIAL,
ECONOMIC AND GENERAL WELL BEING IN THE VALLEY.

4. LANDMARKS ACHIEVED :
 DVC- FIRST MULTIPURPOSE RIVER VALLEY PROJECT BY THE GOVT. OF INDIA.
 DVC- ORGANIZATION GENERATING POWER THROUGH THREE SOURCES- COAL, WATER AND
LIQUID FUEL.
 FIRST UNDERGROUND HYDEL STATION- MAITHON.
 BTPS- NATION’S BIGGEST THERMAL POWER PLANT IN THE 50’S OF THE LAST CENTURY
 BTPS BOILERS- FIRST TO BURN UNTAPPED LOW-GRADE COAL IN PULVERIZED FUEL
FURNACES.
 CTPS- THE FIRST RE-HEAT UNITS IN INDIA, UTILIZING HIGH STEAM PARAMETER.
 MTPS- FIRST OF ITS KIND IN EASTERN INDIA WITH TUBE MILLS IN SERVICE FOR ZERO
REJECT. DIRECT IGNITION OF PULVERIZED COAL (DIPC) SYSTEM FOR REDUCING OIL
CONSUMPTION IN THE BOILER.

5. -: DVC Infrastructure At A Glance :-
DVC COMMAND AREA 24,235 SQ. KMS
POWER MANAGEMENT
TOTAL INSTALLED CAPACITY 2796.5 MW
THERMAL POWER STATIONS FIVE CAPACITY 2570 MW
HYDEL POWER STATIONS THREE CAPACITY 144 MW
GAS TURBINE STATION ONE CAPACITY 82.5 MW
SUB-STATIONS AND
RECEIVING STATIONS
AT 220 KV– 11 NOS.
AT 132 KV– 33 NOS.
AT 33 KV– 16 NOS.
TRANSMISSION LINES
220 KV– 1500 CKT KMS
132 KV– 3415 CKT KMS
33 KV– 1070 CKT KMS

6. DVC POWER PLANTS AT A GLANCE
NAME LOCATION CAPACITY
THERMAL
BOKARO 'B' DIST .- BOKARO
STATE – JHARKHAND
630 MW
(3 X 210 MW)
CHANDRAPURA DIST .- BOKARO
STATE – JHARKHAND
890 MW
(3 X 130 MW)
+
(2 X 250 MW)
DURGAPUR DIST .- BARDDHAMAN
STATE - WEST BENGAL
350 MW
(1X140 MW)
+
(1X210 MW)
MEJIA DIST .- BANKURA
STATE - WEST BENGAL
2340 MW
(4 X 210 MW)
+
(2 X 250 MW)
+
(2 X 500 MW)
DSTPS DIST .- BARDHAMAN
STATE - WEST BENGAL
1000 MW
(2 X 500 MW)
KTPS DIST .- KODERMA
STATE – JHARKHAND
500 MW
(1 X 500 MW)
TOTAL THERMAL 5710 MW

7. NAME LOCATION EXISTING CAPACITY
HYDEL
TILAIYA RIVER - BARAKAR
DIST .- HAZARIBAGH
STATE – JHARKHAND
4 MW
(2 X 2 MW)
MAITHON RIVER - BARAKAR
DIST .- BURDHAMAN
STATE - WEST BENGAL
63.2 MW
(2 X 20 MW)
+
(1 X 23.2 MW)
PANCHET RIVER - DAMODAR
DIST .- DHANBAD
STATE – JHANKHAND
80 MW
(2 X 40 MW)
TOTAL HYDEL 147.2 MW
GRAND TOTAL (THERMAL + HYDEL) 5857.2 MW

8. DAMS

10. MAITHON DAM
KEY OBJECTIVES
FLOOD
CONTOL
GENERATION OF
ELECTRIC POWER
IRRIGATION
NAVIGATION
&
DRAINAGE
WATER
SUPPLY TO
INDUSTRIES
AND
DOMESTICS
Maithon Hydel
• MAITHON HYDEL POWER STATION (MHPS) IS LOCATED ON THE RIVER
BARAKAR.
• FIRST UNDERGROUND POWER STATION.
• GENERATING CAPACITY OF 60 MW.
• MHPS -1000 FEET BELOW THE WATER LEVEL.
TRAINING AT
MAITHON HYDEL POWER STATION
220 KV KALYANESHWARI SUBSTATION
CENTRAL LOAD DISPATCH

11. GENERATIO
N
OVERVIEW

12. Power Generation
 Entrusted with the responsibilities of providing the vital
input power for industrial growth in the resource rich
Damodar Valley region, DVC has been practically
operating as a pioneer, using latest available technologies
to supply bulk power at reasonable rates to the major
industries.
 DVC has maintained its lead role in the eastern region
by adopting itself to the challenges of time and
technology during the course of last 59 years. DVC has
been generating and transmitting power since 1953 and
has succeeded not only in meeting the needs of
consumers but has also helped to increase the demand of
power which itself is an index of development.

13. Maithon Hydal Power Station is
located on the river Barakar 12.9
km above its confluence with the
Damodar near the border of
Dhanbad and Burdwan districts of
the state of Jharkhand and West
Bengal respectively. The unique
feature of this hydal power station
is that it is located underground in
the left bank of the river and is the
first of its kind in India. The Power
station has a total generating
capacity of 60 MW with 3 units of
20 MW each.

14. How Hydropower Works

15. WATER TURBINE:
water turbines are used to convert the energy
of falling water into mechanical energy.

16. PENSTOCK:
It is a closed conduit which connects the fore bay or surge tank to the scroll
case of the turbine.

17. Maithon Hydel Station At A Glance
1. Drainage area 2430 sq . mile
2. Inflow(maximum) 2500 cusec
3. Annual rainfall(max) 70 inch
4. Annual rainfall(avg.) 30.5 inch
5. Area design 28400 al
6. Length of back water 15 miles
7. Major reservoir level 86-500h
8. Gross strong capacity 104,0000 Al H
9. Flood control reservoir 440000 Al H
10. Monsoon storage capacity 496000 Al H
11. Estimated cost of station 4.71 crores

18. 20 Mw Generator Specification
1. Simmens Sehuckert,Germany
2. 3PH,generator no.D73445
3. Type-PFL 670/47-34
4. Y11,000 volt,1310/1525amp
5. RPM-176.6
6. KVA-25000/29000
7. P.F-0.8 const.
Excitor Specification
1. V: 295/330/445
2. A: 465/505/700
Main Excitor
1. DC GEN. NO-D39408
2. TYPE-GV 441/36
3. V-310,333,500
4. RPM-176.6

19. SINGLE LINE DIAGRAM OF HYDEL POWER STATION

20. MEASURING INSTRUMENT USED –
• ENERGY METER - To measure the energy
transmitted energy meters are fitted to the panel to
different feeders the energy transmitted is recorded
after one hour regularly for it MWHr, meter is
provided
• WATTMETERS - It is attached to each feeder to
record the power exported from DVC.
• FREQUENCY METER - To measure the frequency at
each feeder there is the provision of analog or digital
frequency meter.

21. •FREQUENCY METER - To measure the frequency at each feeder
there is the provision of analog or digital frequency meter.
•VOLTMETER - It is provided to measure the phase to phase
voltage .It is also available in both the analog and digital frequency
meter.
•AMMETER - It is provided to measure the line current. It is also
available in both the forms analog as well as digital.
•MAXIMUM DEMAND INDICATOR - There are also mounted
the control panel to record the average power over
successive predetermined period
•MVAR METER - It is to measure the reactive power of the
circuit

22. GENERATED POWER

23. ELECTRIC POWER
TRANSMISSIONELECTRIC-POWER TRANSMISSION IS THE BULK TRANSFER OF
ELECTRICAL ENERGY, FROM GENERATING POWER PLANTS TO
ELECTRICAL SUBSTATION LOCATED NEAR DEMAND CENTERS.
WHAT IS AN ELECTRIC SUBSTATION?
A SUBSTATION IS A PART OF AN ELECTRICAL GENERATION, TRANSMISSION
AND DISTRIBUTION SYSTEM. SUBSTATIONS TRANSFORM VOLTAGE FROM
HIGH TO LOW, OR THE REVERSE, USING STEP-UP OR STEP-DOWN
TRANSFORMERS.
ELEMENTS OF A SUBSTATION A:PRIMARY POWER LINES' SIDE B:SECONDARY POWER LINES'
SIDE 1.PRIMARY POWER LINES 2.GROUND WIRE 3.OVERHEAD LINES 4.TRANSFORMER FOR
MEASUREMENT OF ELECTRIC VOLTAGE 5.DISCONNECT SWITCH 6.CIRCUIT BREAKER
7.CURRENT TRANSFORMER 8.LIGHTNING ARRESTER 9.MAIN TRANSFORMER 10.CONTROL
BUILDING 11.SECURITY FENCE 12.SECONDARY POWER LINES

25. 220KV SYSTEM (12 BAYS)
220KV LINES: -
1) L#228(KALYANESWARI-MTPS)
2) L#229(KALYANESWARI-MTPS)
3) L#203(KALYANESWARI-CTPS)
4) L#204(KALYANESWARI-CTPS)
5) L#217(KALYANESWARI-PGCIL, PITHAKARI)
6) L#218(KALYANESWARI-PGCIL, PITHAKARI)
BUS COUPLER: - 02 NOS.
BUS TIE BAY:-01NO.
AUTOTRANSFORMERS: -
• ATR#1CGL MAKE 150MVA, 220KV/132KV
• ATR#2 CGL MAKE 150MVA, 220KV/132KV
• ATR#3 BHEL MAKE 150MVA, 220KV/132KV
132KV SYSTEM (11 BAYS)
132KV LINES: -
1) L# 18(KLN-KLP)
2) L# 19KLN-KLP)
3) L# 68(MHS-KLN)
4) L# 69(MHS-KLN)
5) MAL-IMPEX FDR (CD – 61MVA)
AUTOTRANSFORMERS: -
1) ATR#1CGL MAKE 150MVA, 220KV/132KV
2) ATR#2 CGL MAKE 150MVA, 220KV/132KV
3) ATR#3 CGL MAKE 150MVA, 220KV/132KV
TWO WINDING TRANSFORMERS:-
1) 50 MVA, 132/33KV, APEX MAKE.
2) 31.5MVA, 132/33KV, TELK MAKE.
BUS COUPLER: - 01 NO.

26. 33KV SYSTEM
NAME OF THE CONSUMERS:
1) IMPEX STEEL (PVT) LTD.(CD-7.0MVA)
2) HIRA CONCUST STEEL PVT LTD (CD-7.0MVA)
3) CITY ALLOYS PVT. LTD. (CD-3.0MVA)
4) BMA STAINLESS LIMITED (CD-12.0MVA)
5) JAGDAMBA ISPAT PVT LIMITED (CD-3.0MVA)
6) MAA LILORI ISPAT LTD. (CD- 3.0MVA)
7) CHHABRA ISPAT PVT. LTD.(CD – 8MVA)

27. SUBSTATION PARTS AND EQUIPMENT
OUTDOOR
SWITCHYARD INCOMING & OUTGOING LINES
 BUSBARS
 POWER TRANSFORMERS AND MEASUREMENT TRANSFORMERS
 INSULATORS
 CIRCUIT-BEAKERS & ISOLATORS
 LIGHTNING ARRESTORS
 GALVANISED STEEL STRUCTURES FOR TOWERS & EQUIPMENT SUPPORTS.
 ROADS, RAILWAY TRACK, CABLE TRENCHES
 PLCC EQUIPMENT INCLUDING LINE TRAP, TUNING UNIT, COUPLING CAPACITOR, ETC.
 STATION EARTHING SYSTEM COMPRISING GROUND MAT, RISERS, AUXILIARY MAT,
EARTHING STRIPS, EARTHING SPIKES & EARTH ELECTRODES.
 CONTROL CABLES FOR PROTECTION AND CONTROL
CONTROL BUILDING
IN EVERY SUB-STATION CERTAIN SUPERVISION, CONTROL AND PROTECTION FUNCTIONS
ARE NECESSARY. SO A CONTROL BUILDING/CONTROL ROOM IS REQUIRED. THE RELAY
AND PROTECTION PANELS AND CONTROL PANELS ARE INSTALLED IN THE CONTROL
ROOM.
CONTROL IN SUB-STATION ARE OF TWO CATEGORIES.
1. NORMAL ROUTINE OPERATION BY OPERATORS COMMAND.
2. AUTOMATIC OPERATION BY ACTION OF PROTECTIVE RELAYS AND CONTROL SYSTEM

28. FUNCTIONS OF CONTROL ROOM
1. ALARM FUNCTIONS
2. CONTROL AND INDICATION
3. DATA COLLECTION, RECORDING,
DISPLAYTRANSFORMERS PRESENT IN KALYANESHWARI SUBSTATION
150 MVA 220/132KV AUTO-TRANSFORMER
Make –BHEL
Year of manufacture: 2003
Type of cooling: ONAN/ONAF/OFAF
Rating HV & LV (VA)- 75/ 105/ 50
( 50%/75%/100%)
Rating LV - 10/ 14/20
(50%/70%/100%)
Temp rise oil- 40C (Over Ambient of 50)
Temp rise winding- 45 (Over Ambient of 50)
Purchase order Ref- PE-SPEC-719(R)/581257
Dated 03.12.02
Maker Sl No- 6006080
Elect Spec No- 601098
Phase 3Ǿ
Frequency 50 Hz
Connection Symbol- YNa0d1
Impedance Volt at 150MVA Base
HV Position (1/IV) 12.6% to 16.24%
HV Position (9b/IV) 14.1% to 15.5%
HV Position (17/IV) 13% to 16.77%
No Load Voltage HV (Kv)-230
No Load Voltage IV (Kv)- 138
No Load Voltage LV (Kv)-6.9
Line Current HV (Amps)-188.5/263.9/377.0
Line Current LV (Amps)- 314.2/439.8/628.3
Line Current LV (Amps)- 837.8/1172.9/1675.5
Insulation Level:
HV- L1 950AC 395-L1 170 AC 70
IV- L1550AC 275
LV-L1 75AC 2×6.9
Diagram DRG No- 34631900019
OGA DRG No- 3463000066
Core and winding (Kg)- 59700
Weight of oil (Kg)- 38280
Total weight (Kg)-140365
Oil quantity (L)- 44000
Transport Weight (Kg)-79000
Undertaking weight (Kg) – 59700

29. CURRENT TRANSFORMER (CT):
MAKE – ELECTRIC POWER EQUIPMENT CO.
MSR INDUSTRIES ESTATE, BANGALORE – 560054
TYPE – OHCDB-R
HSV – 36KV
SERIAL NO. – 33193
FREQ – 50 HZ.
RATED VOLTAGE – 33KV
SHORT TIME THERMAL CURRENT – 15.15KA FOR 3 SECS
INSULATION – 70/170KV
QTY OF OIL/WT. – 20 LTR./ 24 KG APRX.
DYNAMIC CURRENT – 65.6 KAP
YEAR – 1999
TOTAL WT. – 150 KGS (APRX)
MAX. TEMP. RISE - WINDING - 45C
INSULATION – ‘A’
OVER AMBIENT (45C) OIL - 40C
CONTINUOUS THERMAL CURRENT – 780 A
25.24KA FOR 1 SECS
MAKE – MODERN ELECTRONIC
TYPE – OPT
RATIO – 33KV3 / 1103V /1103V.
HSV – 36KV,
PHASE – 1,
FREQ- 50 HZ
INSULATION CLASS – A
CORE - I II
BURDEN - 100 100
CLASS - 0.2 3P
V.F - 1.2 CONT. & 1.9 FOR 30 S
CONN – PH – E
BIL – 70/170KV
TEMP. RISE OVER WDG OIL
45C 35C
OIL QTY. – 20 LTR.
TOTAL WT. – 90KG
ISS – 3156,
SL. NO.- ME/PT/411/08
P.O NO. – CE(T)/P – 4/ST – BB/2087
POTENTIAL TRANSFORMER (PT):

30. Circuit Breakers:
MAIN FUNCTION OF CIRCUIT BREAKER IS TO SWITCH OFF AND SWITCH ON
THE NORMAL CURRENT AND TOP TRIP THE CIRCUIT AT THE OCCURANCE OF
ANY FAULT.
CIRCUIT BREAKERS USED IN THIS SUBSTATION:
 MINIMUM OIL CIRCUIT BREAKER
 SF6 CIRCUIT BREAKER
SF CIRCUIT BREAKER (220KV SYSTEM) DETAILS :
Type - 3AP1F1
Year of Manufacturing/No - 2006/IND/01/2276
Rated Voltage 245 kV
Rated lightning impulse withstand voltage 1050 kVP
Rated Power Freq. withstand voltage 460 kV
Rated Frequency 50 Hz
Rated Normal Current 3150 A
Rated S. Circuit breaking current 40kA
Rated S. Circuit Duration 3 S
Rated out of phase breaking current 10Ka
First -pole-to-clear factor 1.3
Rated line charging breaking current 125 A
Rated pressure of SF6 at +20ºC (gauge) 6.0 bar rel
Rated operating sequence O-0.3S-CO-3
m-CO
Weight of SF6 filling Approx 22
Kg

31. Isolators:
ISOLATORS GIVE PHYSICAL SEPARATION BETWEEN LIVE
PART AND DEAD PART. PHYSICAL SEPARATION CAN BE
SEEN BY NAKED EYE FROM A DISTANCE.
Surge/Ligthning Arrestors (LA):
SINGLE POLE UNITS CONNECTED BETWEEN BUSBAR AND
GROUND. HIGH VOLTAGE SURGES CAUSED BY LIGHTNING
OR SWITCHING ARE DISCHARGED EFFECTIVELY TO
EARTH.
Bus bars: BUSBARS ARE CONDUCTORS OF ADEQUATE
CROSS-SECTION, SUPPORTED ON INSULATORS

32. PROTECTION & CONTROL:
Objectives of Protection:
I) TO DISCONNECT THE FAULTY CIRCUIT WITH MINIMUM
DAMAGE DUE TO FAULT.
II) TO LEAVE THE REST OF THE POWER SYSTEM IN A HEALTHY
STATE.
III) COST OF REPAIR OF DAMAGE TO BE KEPT MINIMUM.
IV) TO RESTRICT POSSIBILITY OF SPREADING AND INVOLVING
OTHER EQUIPMENT.
V) TO REDUCE TIME THE EQUIPMENT OUT OF SERVICE.
VI) TO MINIMIZE COST OF REVENUE LOSS.
Characteristic of Protection:
I) VERY FAST
II) SELECTIVE
III) SENSITIVE
III) STABLE UNDER EXTERNAL FAULT

33. REFERENCES
• article.wn.com (Generation)
• nirmancare.com (Hydro Power Plant)
• old.optcl.co.in (Power Grid)
• kalkitech.com (block of CLD)
• Company Manual (HR Department)
• Sub Station Manual