Dvc Maithon Report 6n2p26

UNIVERSITY INSTITUTE OF TECHNOLOGY

TRAINING REPORT ON

DAMODAR VALLEY ORPORATION

SUBMITTED BY: • HABIB MOLLAH

(2011-6029) • SANCHAYITA DAS (2011-6010)

SUBMITTED TO: 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 ELECTRICAL ENERGY.

AND

DISTRIBUTION

OF

 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 2796.5 MW CAPACITY 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

DVC POWER PLANTS AT A GLANCE NAME

BOKARO 'B' CHANDRAPURA

LOCATION THERMAL DIST .- BOKARO STATE – JHARKHAND DIST .- BOKARO STATE – JHARKHAND

DURGAPUR

DIST .- BARDDHAMAN STATE - WEST BENGAL

MEJIA

DIST .- BANKURA STATE - WEST BENGAL

DSTPS

DIST .- BARDHAMAN STATE - WEST BENGAL DIST .- KODERMA STATE – JHARKHAND

KTPS TOTAL THERMAL

CAPACITY 630 MW (3 X 210 MW) 890 MW (3 X 130 MW) + (2 X 250 MW) 350 MW (1X140 MW) + (1X210 MW) 2340 MW (4 X 210 MW)  + (2 X 250 MW) + (2 X 500 MW) 1000 MW (2 X 500 MW) 500 MW (1 X 500 MW) 5710 MW

NAME

LOCATION

EXISTING CAPACITY

HYDEL TILAIYA

MAITHON

PANCHET

RIVER - BARAKAR DIST .- HAZARIBAGH STATE – JHARKHAND RIVER - BARAKAR DIST .- BURDHAMAN STATE - WEST BENGAL RIVER - DAMODAR DIST .- DHANBAD STATE – JHANKHAND

TOTAL HYDEL

GRAND TOTAL (THERMAL + HYDEL)

4 MW  (2 X 2 MW) 63.2 MW (2 X 20 MW) + (1 X 23.2 MW) 80 MW (2 X 40 MW) 147.2 MW

5857.2 MW

DAMS

MAITHON DAM KEY OBJECTIVES

FLOOD CONTOL

GENERATION OF ELECTRIC POWER

IRRIGATIO N

NAVIGATIO N& DRAINAGE

WATER SUPPLY TO INDUSTRIE S AND DOMESTIC S

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

ON 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 HYDEL POWER STATION 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, 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 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 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 TRANSMISSION ELECTRIC-POWER TRANSMISSION IS THE BULK TRANSFER OF ELECTRICAL ENERGY, FROM GENERATING POWER PLANTS TO ELECTRICAL SUBSTATION LOCATED NEAR DEMAND CENTERS.

HAT 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

220KV KALYANESWARI SUB-STATION

220KV SYSTEM (12 BAYS) 1) 2) 3) 4) 5) 6)

220KV LINES: L#228(KALYANESWARI-MTPS) L#229(KALYANESWARI-MTPS) L#203(KALYANESWARI-CTPS) L#204(KALYANESWARI-CTPS) L#217(KALYANESWARI-PGCIL, PITHAKARI) 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)

BUS COUPLER: - 01 NO.

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.

33KV SYSTEM NAME OF THE CONSUMERS: 1) IMPEX STEEL (PVT) LTD.(CD-7.0MVA) SUBSTATIO 2) HIRA CONCUST STEEL PVT LTD (CD-7.0MVA) N 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) SWITCHYA CONTROL 7) CHHABRA ISPAT PVT. LTD.(CD – 8MVA) RD BUILDING

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 S. 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 S AND CONTROL S 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 ROOM

1. ALARM FUNCTIONS 2. CONTROL AND INDICATION 3. DATA COLLECTION, RECORDING, TRANSFORMERS PRESENT IN KALYANESHWARI SUBSTATION DISPLAY 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

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 25.24KA FOR 1 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  

Instrume nt transfor mer Current transfor mer

POTENTIAL TRANSFORMER (PT): 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 transfor mer

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 S Rated out of phase breaking current

3

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, ED 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