TRAINING REPORTON

DAMODAR VALLEY ORPORATION

UN

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•HABIB MOLLAH

(2011-6029)

•SANCHAYITA DAS

(2011-6010)

Mr. KALLOL ROY(H.O.D OF ELECTRICAL ENGG)

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).

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.

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.

-: 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

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

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

DAMS

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

GENERATION

OVERVIEW

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.

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.

How Hydropower Works

WATER TURBINE: water turbines are used to convert the energy

of falling water into mechanical energy.

PENSTOCK:It is a closed conduit which connects the fore bay or surge tank to the scroll

case of the turbine.

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

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

SINGLE LINE DIAGRAM OF HYDEL POWER STATION

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.

•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

GENERATED POWER

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

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.

33KV SYSTEMNAME 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)

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 BUILDINGIN 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

FUNCTIONS OF CONTROL ROOM1. 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- 40C (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

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 - 45C

INSULATION – ‘A’

OVER AMBIENT (45C) OIL - 40C

CONTINUOUS THERMAL CURRENT – 780 A

25.24KA FOR 1 SECS

MAKE – MODERN ELECTRONIC

TYPE – OPT

RATIO – 33KV3 / 1103V /1103V.

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

45C 35C

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):

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

Weight including SF6 (excluding structure) Approx

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

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

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