attachment to kulekhani–i hydropower (bel-069)
TRANSCRIPT
ATTACHMENT TO KULEKHANI –I HYDROPOWER
BHUPENDRA SAUD -207 BHUBAN DHAMALA -208 KABINDRA POKHAREL -
226 NAWARAJ PAUDEL-233 RABINDRA BHANDARI -
234 SUMAN ADHIKARI-242
BACKGROUND Location:
Dam:Makawanpur,kulekhani Powerhouse:Makawanpur,Dhorshing
Construction started : 1977 A.D. Generation started : 1982 A.D. Installed capacity : 60 MW Primary Annual generation : 165 GWh Secondary annual generation: 46 GWh Capital cost: $117.84 million Funded by : World bank, Kuwait fund, UNDP, Overseas
economic cooperation fund, GON
CIVIL STRUCTURE Dam
1 Type :Zoned Rock Fill Dam with
Inclined Core
2Dam Height
:114 m
3Crest Length
:406 m
4Crest Width
:10 m
5
Embankment Volume
:
4,4419348 m^3
Reservoir1 Catchment basin
area :126 km^2
2Reservoir area : 2.2 km^2 at highest water level
: 1530m from (M.S.L.)3 Gross storage
capacity : 85.30 million cu.m (Initial) : 62.30 cu. m (Estimated 2002)4 Effective Storage
Capacity : 73.30 million cu. M(Initial) 55.56 cu.m (Estimated 2002)5 Dead Storage : 12 million cu.m (Initial) : 6.74 cu.m (Estimated 2002)6 Design Flood
Inflow : 1380 m^3/sec7 Probable Max.
Inflow : 2720 m^3/sec8 Design Flood
Outflow : 1270 m^3/sec9 Probable
Max.Flood Outflow: 2540 m^3/sec
10
Fax Strech in Full Level : 7 km
Waterway Intake
1Original Structure
Type :Horizontal Bell mouth type with
gate shaft
Gate :Caterpillar Gate
2.5m wide*25m high
2Sloping Intake :Constructed under KDPP-I
Dimension :103m long*7.2m wide*5.2m high
Inside width :2.5 m
Minimum operation level for :13.1 m^3/sec
full load 60 mw
Tributary Intakea Chakhel Intake
Type :Non controlled weir type
Connecting Tunnel : 2368 m Long
Dimension : 1.8m wide*18m high
Maximum capacity : 4.1 m^3/sec
b Sim Intake
Type :
Non controlled weir with shaft of 94.7m high and an air trap chamber
Maximim capacity : 3.3 m^3/sec
Spillway:Controlled Crest with 2 Radial Gates of 9.0m wide * 11.5m high and Non-Controlled Crest of 65m Long with Chute and Plunge Pool
Penstock Line1 Diameter : 2.1-1.5 m2 Length : 1324 m
3Length of Bifurcation(each) : 14 m
Headrace Tunnel
1
Type :
Circular Section
2
Diameter and length :
2.5m dia*6233m long
Surge Tank1
Type : Circular Section2 Diameter
and Height
: 3m dia*92m high
Tailrace Tunnel
1Type : Chamber type
2Dimension : 3.1m wide *in length
BY PASS VALVE & INLET VALVE Inlet valve Regulate water flow Remains complete open/close By pass valve Reduce water
pressure to open inlet valve
TURBINE
Turbine
1No. of units : Two
2Type :Vertical Shaft Pelton
3Rated output : 31,000 kW
4Rated speed : 600 rpm (50 Hz)
5Gross Head : 614m to 560m
6Rated Head : 550m
7Maximum Discharge : 13.1 m3/sec
TURBINE ROTATING AND COUPLING MECHANISM
GOVERNING MECHANISM Regulate bucket striking water flow Maintains constant speed under varying load condition
Load ↑ −►water flow ↑ Load ↓ −►water flow ↓
SCHEMATIC DIAGRAM OF GOVERNER
GENERATOR & EXCITOR
Generator
1.No. of units :Two
2.Types :Vertical Shaft revolving salient field three phase synchronous type
3.Rated Capacity :35000 kVA 0.85 lag
4.Generating Voltage :11 kV
5.Frequency :50 Hz Fig: excitor
EXCITATION SYSTEM
COOLING SYSTEM
Water cooling system
Cools generator and power transformer
SYNCRONIZATION / BRAKING SYSTEM
Condition : Set during construction
1. Waveform2. Phase sequence
Set during synchronization
3. Frequency4. Voltage 5. Phase angle
Braking system Jet brake:- reverse
striking of water to bucket Air brake :- when speed reached 40%
SINGLE LINE DIAGRAM OF KULEKHANI-1
SWITCH YARD
Switchyard
TRANSFORMER
Rating 35MVAfrequency
50HZ
connection
Star/delta
type 3 phase oil immersed forced oil-circulation with water cooler, indoor type
Primary voltage
11Kv
Secondary voltage
66Kv
Primary current
1837
Secondary current
306
500 Kva for PH
CURRENT AND VOLTAGE TRANSFORMER
Voltage 66Kv
unit 1 per phaseconnection Parallel to busbarSecondary voltage 110 V
Primary current 400-600ASecondary current 5A
type 3-core secondary
unit 2
RELAY
CIRCUIT BREAKERS
type SF6VOLTAGE 66KVNorma current 0.5KABraking current
12.5KA
Making current 31.5KARestriking voltage
0.75us/kv
Brake timeMaking timeBraking time
5s0.15s0.05s
For 11Kv – vacuum CB
Synchronizing SF6 CB
Breaking SF6 CB
ISOLATOR
LIGHTNING ARRESTORtype Metal
oxide arrestor
Fault on R phase 5
Fault on Y phase 3
Fault on B phase 1
EARTHING
Earth wire
PLCC:-POWER LINE CARRIER COMMUNICATION
Way of Data transmission system using power line Each end of transmission line is provided with PLCC equipmentFor Station to station communication Protection of transmission line
SCADA:-supervisory control and data acquisition system Operates with coded signals over communication channel Control of remote equipment Programmable logic controller (PLCs) as subsystems ButNot used in kulekhani- 1 power station
Fire fighting system Performed manually with water
Cooling system
Sound trap system Traps the noise and Removes out of the plant
AIR CIRCULATING SYSTEMWhy…….?? Complete underground powerhouse with 500m tunnel way
MAIN FEATURES OF POWER STATION
Address Power outage problemBut, how..?For Brownout → supply reactive power Rolling out → rated constant power supply during dry season also “Blackout” → start operation and energized main transmission line.
WHY KULEKHANI-I FOR BLACK START…??
Considering the Ferranty effect problem. Constant discharge.Process of black start Backup battery starts diesel generator Diesel generator helps to bring generating station into operation Energize the key transmission line Starts other power plant
Battery backup
Diesel generator
Plant operatio
n
Transmission line
BACKUP SYSTEM
Battery bank : 400 Ah Total load of PH : 20
Amp For protection For internal lighting
Diesel Generator 1 : capacity : 350 Kva/240KW RPM : 1500 gen. voltage 400V Diesel generator-2 Capacity : 385kva/286.4kw RPM 1500 Gen. voltage 400V
For maintenance For black start
time Power load Power factor Gen.1 MW Gen.2 MW Total MW Gen.1
cosɸ1Gen.2 cosɸ2
Freq. Hz Voltage KV Water level
01:00 - - - - - 49.6 68.5 1526.9902:00 - - - - - 49.3 65.5 1526.9903:00 - - - - - 49.5 66.0 1526.9904:00 - - - - - 49.2 66.6 1526.9905:00 - - - - - 49.3 67.2 1526.9906:00 - - - - - 49.4 66.9 1527.0007:00 - - - - - 49.2 65.0 1527.0008:00 - - - - - 49.6 66.0 1527.0009:00 - - - - - 49.6 63.0 1527.0010:00 - - - - - 49.6 62.0 1527.0011:00 - - - - - 49.6 63.3 1527.0012:00 - - - - - 49.5 64.3 1527.0013:00 - - - - - 49.2 64.8 1527.0014:00 - - - - - 49.2 64.6 1527.0015:00 - - - - - 49.6 65.1 1527.0116:00 - - - - - 49.8 65.7 1527.0117:00 - - - - - 49.0 62.4 1527.0118:00 30.00 - 30.00 1.00 - 49.1 64.6 1527.0119:00 20.00 - 20.0 0.98 - 49.2 66.0 1527.0020:00 - - - - - 49.1 66.9 1527.0021:00 - - - - - 49.3 66.6 1527.0022:00 - - - - - 49.4 63.3 1527.0023:00 - - - - - 49.5 66.0 1527.0024:00 - - - - - 49.5 66.0 1527.00
DAILY LOG SHEET-2072/09/02
Morning peak load (MW) Evening peak time (KW)
time KL-1 Hz time KL-1 Hz
06:00 - - 17:30 - -
06:15 - - 17:45 26.00 49.1
06:30 - - 18:00 30.00 49.1
06:45 - - 18:15 30.00 49.1
07:00 - - 18:30 30.00 49.3
07:15 - - 18:45 28.00 49.3
07:30 - - 19:00 20.00 49.2
07:45 - - 19:15 24.00 49.0
08:00 - - 19:30 11.00 49.5
08:15 - - 19:45 10.00 49.8
08:30 - - 20:00 - -
RECOMMENDATION Use of sectionalized Bus bar Upgrade transmission from 66Kv Use of SCADA system Removal of sediment from the reservoir
….THANK YOU….