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Mahaweli Hydro Power Complex Ceylon Electricity Board
Annual Report 2011
Prepared by: CGS Gunasekara
CE(Mahaweli Complex)
February 2012
Contact Details
Address : Mahaweli Complex Office,
Ceylon Electricity board,
PO Box 42,
Ampitiya road,
Kandy
Telephone: 081- 2244568/ 081-4950688 / 081-4950689
Fax : 081-2232802
E-mail : [email protected]
Website : http://www.mahawelicomplex.lk
Content
Mahaweli Complex Power stations and reservoirs Mahaweli Complex contribution to generation Contribution by stations Cumulative Energy during 2011 Monthly generation of power stations
o Kothmale o Victoria o Randenigala o Rantambe o Ukuwela o Bowatenna o Nilambe
Availability of generators
o Planned outages o Forced outages
Plant factors of generating units Yearly Generation of Stations from 1998-2011
o Kothmale o Victoria o Randenigala o Rantambe o Ukuwela o Bowatenna o Nilambe
Total generation of Mahaweli Complex 1998-2011 No of Employees Vs Units Generated by each station Total Expenditure Distribution Over time analysis / different grades /each station and complex Expenditure Comparision each station Generation unit cost
o Generation unit cost station wise Water Consumption Reservoir Levels Major activities carried out in stations
Mahaweli Complex Power Stations and reservoirs
Mahaweli Hydro power complex consists of six major power station which has an installed capacity of 660 MWs. Last year in 2011 Mahaweli Complex has contributed by generating 1985 GWhrs (i.e. 17%) to the total energy generation. The major power stations coming under Mahaweli complex are, Kotmale, Victoria, Randenigala, Rantambe, Ukuwela, Bowatenna and Nilambe covering 1268 sqkm of Mahaweli basin, each station has the following capacities. Upper Kotmale which has a installed capacity of 150 MW is under construction and will be commissioned during 2012 enhancing the Mahaweli Complex installed capacity to 810 MWs.
Kothmale (67 x 3 MW) Victoria (70 x 3 MW ) Randenigala ( 61 x 2 MW Rantambe ( 24.5 x 2 MW Ukuwela ( 20 x 2 MW) Bowatenna ( 40 x 1 MW Nilambe ( 1.66 x 2 MW) Upper Kotmale (75 x 2MW)
Mahaweli Complex hydro power system consists of, Kothmale, Victoria, Polgolla, Randenigala and Rantambe reservoirs.
Mahaweli Complex contribution to generation
Laxapana 12%
Mahaweli17%
Other Hydro6%
CEB Thermal in.
Chunnkam22%
Wind 0.03%
Hired 0%
IPP Thermal37%
Private Mini hydro (SPP)
6%
Comparison of Energy Generated During 2011
0.000
200.000
400.000
600.000
800.000
1000.000
1200.000
Jan Feb March April May June July Aug. Sep Oct Nov Dec
Generation During 2011 (GWh)
Laxapana Mahaweli Other Hydro
CEB Thermal in. Chunnkam Wind Hired
IPP Thermal Private Mini hydro (SPP)
Contribution by Stations in Mahaweli Complex
Kotmale 18.78%
Victoria 37.63%
Ukuwela 7.93%
Bowatenna 3.97%
Randenigala 21%
Rantambe 10.35%
Mahaweli Complex Annual Generation in 2011
0.00050.000
100.000150.000200.000250.000300.000350.000400.000450.000
Jan Feb March April May June July Aug. Sep Oct Nov Dec
Mahaweli Complex Generation during 2011 (Gwh)
Kotmale Victoria Ukuwela Bowatenna Randenigala Rantambe Nilambe
Cumalative Energy Generated During 2011 (GWhr) by Mahaweli Complex
386.05
736.19
964.90
1129.59
1339.98
1533.751653.87
1733.97 1768.301832.00
1923.00 1985.00
JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Cumalative Energy Generated GWh in 2011
Energy Generated GWhr Expected Energy 2046 GWh
Monthly Generation in each station
0
5000
10000
15000
20000
25000
30000
January March May July September November
Kothmale Generation MWHr in 2011
UNIT 01 UNIT 02
0
10000
20000
30000
40000
50000
60000
January March May July September November
Victoria Generation MWHr in 2011
UNIT 01 UNIT 02 UNIT 03
0
5000
10000
15000
20000
25000
30000
35000
40000
45000
50000
January March May July September November
Randenigala Generation MWHr in 2011
UNIT 01 UNIT 02
0
5000
10000
15000
20000
25000
January March May July September November
Rantambe Generation MWHr in 2011
UNIT 01
02000400060008000
100001200014000
January March May July September November
Ukuwela Generation MWHr in 2011
UNIT 01 UNIT 02
0
5000
10000
15000
20000
25000
30000
January March May July September November
Bowathenna Generation MWHr in 2011
UNI…
0200400600800
100012001400
January March May July September November
Nilambe Generation MWHr in 2011
unit 01
0.00
10.00
20.00
30.00
40.00
50.00
60.00
70.00
80.00
90.00
100.00
Kot 01 Kot 02Kot 03 Vic 01 Vic 02 Vic 03 Rand 01
Rand 02
Rant 01
Rant 02
Uku 01
Uku 02
Bow 01
Nill 01 Nill 02
Availability %
Availability %
Availability of plants 2011
Unit Run hrs. Outage hrs. Availability %
PLANT FACTOR Maintanence Breakdown Kot 01 4479.79 921.64 13.87 89.32 51.14
Kot 02 3784.70 1391.29 223.39 81.57 43.20
Kot 03 3291.53 1887.79 52.01 77.86 37.57
Vic 01 4520.39 1299.57 46.34 84.64 51.60
Vic 02 4891.00 137.22 35.81 98.02 55.83
Vic 03 6480.80 227.45 29.84 97.06 73.98
Rand 01 3752.20 89.41 38.57 98.54 42.83
Rand 02 4138.20 744.82 37.51 91.07 47.24
Rant 01 4613.00 101.36 22.56 98.59 52.66
Rant 02 4766.69 151.03 51.23 97.69 54.41
Uku 01 3880.40 1938.35 195.41 75.64 44.30
Uku 02 4660.00 651.70 244.33 89.77 53.20
Bow 01 3897.39 386.62 12.15 95.45 44.49
Nill 01 2458.80 72.50 23.47 98.90 28.07
Nill 02 2553.15 74.50 21.67 98.90 29.15
TOTAL 62168.04 10075.25 1048.16
Planned and forced outages Hours
Running Hours
-100.0050.00
200.00350.00500.00650.00800.00950.00
1100.001250.001400.001550.001700.001850.002000.00
Kot 01Kot 02Kot 03Vic 01 Vic 02 Vic 03 Rand 01
Rand 02
Rant 01
Rant 02
Uku 01
Uku 02
Bow 01
Nill 01Nill 02
Planned and Forced outages hours
MAINTANENCE BREAKDOWN
0.00
1000.00
2000.00
3000.00
4000.00
5000.00
6000.00
7000.00
Kot 01Kot 02Kot 03 Vic 01 Vic 02 Vic 03 Rand 01
Rand 02
Rant 01
Rant 02
Uku 01
Uku 02
Bow 01
Nill 01 Nill 02
Run hrs.
51.14
43.2037.57
51.6055.83
73.98
42.8347.24
52.66 54.41
44.30
53.20
44.49
28.07 29.15
0.00
10.00
20.00
30.00
40.00
50.00
60.00
70.00
80.00
Kot 01 Kot 02 Kot 03 Vic 01 Vic 02 Vic 03 Rand 01
Rand 02
Rant 01 Rant 02 Uku 01 Uku 02 Bow 01 Nill 01 Nill 02
Plant Factor
Plant Factors of generating units
Yearly Generation of stations Since 1998 to 2011
0.00
200.00
400.00
600.00
800.00
1000.00
1200.00
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011
Energy Generated (GWhr) - Mahaweli Complex 1998-2011
Kothmale Victoria Randenigala Rantambe Ukuwela Bowatenna Nilambe
0
2023.872179.34
1638.34
1400.4961283.78
1427.38
1046.521237.74
2136.39
1770.891585.168
1245.51
2445.99
1985
year 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011
Total Energy Generated (GWhr) - Mahaweli Complex (1998-2011)
Average expected 2046 GWHrs
Energy Generated by Individual Stations since 1998 to 2011
Energy Generated (GWhr) Year Kothmale Victoria Randenigala Rantambe Ukuwela Bowatenna Nilambe Total
1998 470.00 650.00 460.00 180.00 200.00 55.97 7.90 2023.9 1999 450.00 840.00 455.00 185.00 180.00 59.54 9.80 2179.3 2000 370.00 550.00 375.00 166.00 135.00 31.00 11.34 1638.3 2001 350.00 466.00 250.00 150.00 135.00 40.70 8.80 1400.5 2002 267.00 435.00 275.00 105.00 155.00 36.88 9.90 1283.8 2003 300.00 495.00 280.00 170.00 130.00 44.68 7.70 1427.4 2004 290.00 340.00 140.00 100.00 135.00 35.42 6.10 1046.5 2005 333.00 350.00 220.00 115.00 170.00 42.21 7.53 1237.7 2006 480.00 825.00 380.00 200.00 165.00 73.75 12.64 2136.4 2007 395.00 610.00 335.00 175.00 190.00 54.79 11.10 1770.9 2008 298.00 580.00 310.00 180.00 155.00 53.07 9.10 1585.2 2009 383.00 428.00 133.85 89.28 161.47 41.20 8.71 1245.5 2010 582.61 971.00 428.12 213.21 171.00 65.81 14.24 2446.0 2011 372.73 747.04 413.29 204.74 158.36 79.14 9.92 1985.2
470.00 450.00
370.00 350.00
267.00300.00 290.00
333.00
480.00
395.00
298.00
383.00
582.61
372.73
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011
Kotmale Power StationKothmale Expected Energy 482 Gwhr
650.00
840.00
550.00466.00 435.00 495.00
340.00 350.00
825.00
610.00 580.00428.00
971.00
747.04
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011
Victoria Power Station
Victoria Expected Energy 726 Gwhr
460.00 455.00
375.00
250.00 275.00 280.00
140.00
220.00
380.00335.00 310.00
133.85
428.12391.78
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011
Randenigala Power Station
Randenigala Expected Energy 378 Gwhr
180.00 185.00166.00
150.00
105.00
170.00
100.00115.00
200.00175.00 180.00
89.28
213.21227.97
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011
Rantambe Power StationRantambe Expected Energy 223 Gwhr
200.00180.00
135.00 135.00155.00
130.00 135.00
170.00 165.00190.00
155.00 161.47 171.00149.41
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011
Ukuwela Power Station
Ukuwela Expected Energy 177 Gwhr
55.97 59.54
31.0040.70 36.88
44.6835.42
42.21
73.75
54.79 53.07
41.20
65.81
78.52
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011
Bowatenna Power StationBowatenna Expected Energy 53 Gwhr
7.909.80
11.34
8.809.90
7.706.10
7.53
12.6411.10
9.10 8.71
14.24
9.92
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011
Nillambe Power StationNilambe Expected Energy 14.7 Gwhr
No of Employees Vs Units Generated by each station in Mahaweli Complex for 2011
Station No of Employees Units Gen. No of Employees/
Total O&M Security GWh GWh Complex office 37 37 0 0.00 0.00 Kotmale 124 88 36 372.73 0.33 Victoria 93 67 26 747.04 0.12 Randenigala 98 80 18 619.15 0.16 Ukuwela 93 72 21 157.51 0.59 Bowatenna 68 51 17 78.76 0.86 Niilambe 29 18 11 9.92 2.92 Total 542 413 129 1985.11 0.27
0.000.33
0.12 0.16
0.590.86
2.92
0.00
0.50
1.00
1.50
2.00
2.50
3.00
3.50
Complex office
Kotmale Victoria Randenigala Ukuwela Bowatenna Niilambe
No of Employees/ GWh
No of Employees/ GWh
Total Expenditure Distribution
Total expenditure with depreciation
Description Actual (Rs) Budget (Rs) Varience (Rs) % Personnel 548,675,760.20 574,247,600.00 25,571,839.80 4.45 Material 293,237,956.34 270,940,000.00 -22,297,956.34 -8.23 Accomodation 38,704,133.35 48,253,440.00 9,549,306.65 19.79 Transport and Communication 54,714,954.08 64,300,000.00 9,585,045.92 14.91 Depreciation 2,461,334,813.68 2,667,500,000.00 206,165,186.32 7.73 Other 24,928,838.40 29,984,560.00 5,055,721.60 16.86 Finance 386,849.90 1,265,500.00 878,650.10 69.43 Total Expenditure 3,421,983,305.95 3,656,491,100.00 234,507,794.05 6.41
Total expenditure with depreciation
Personnel
Material
Accomodation
Transport and Communication
Depreciation
Other
Finance
Total expenditure without depreciation Description Actual (Rs) Budget (Rs) Varience (Rs) % Personnel 548,675,760.20 574,247,600.00 25,571,839.80 4.45 Material 293,237,956.34 270,940,000.00 -22,297,956.34 -8.23 Accomodation 38,704,133.35 48,253,440.00 9,549,306.65 19.79 Transport and Communication 54,714,954.08 64,300,000.00 9,585,045.92 14.91 Other 24,928,838.40 29,984,560.00 5,055,721.60 16.86 Finance 386,849.90 1,265,500.00 878,650.10 69.43 Total Expenditure 960,648,492.27 988,991,100.00 28,342,607.73 2.87
Total expenditure without depreciation
Personnel
Material
Accomodation
Transport and Communication
Other
Finance
Overtime analysis /Different grades / each station and complex
TOTAL
Station Supn Staff Clerical & Allied Grades Minor Grades & Driver
No Total Average No Total Average No Total Average MC office 830 0 0 0 242 2,002,044 98,652 100 1,342,490 204,892 Victoria 831 118 1,935,185 196,828 381 6,101,864 210,037 529 4,718,433 135,800 Kotmale 832 96 2,022,700 252,838 498 9,109,880 240,868 689 10,155,103 226,497 Ukuwela 833 73 1,101,844 177,273 322 4,189,194 171,524 676 6,464,830 151,325 Bowatenna 834 114 1,536,956 162,415 265 3,402,945 174,908 406 3,284,918 121,584 Randenigala 835 143 2,896,798 243,088 275 3,863,428 183,455 636 8,223,016 188,218 Nillambe 837 12 253,836 253,836 141 2,061,252 175,569 226 2,478,323 136,865 Total 556 9747319 17,531 2124 30730607 14468 3262 36667112 11241
MC office 830
Victoria 831
Kotmale 832
Ukuwela 833
Bowatenna 834
Randenigala 835
Nillambe 837
Supn Staff 0 196,828 252,838 177,273 162,415 243,088 253,836
Clerical & Allied Grades 98,652 210,037 240,868 171,524 174,908 183,455 175,569
Minor Grades & Driver 204,892 135,800 226,497 151,325 121,584 188,218 136,865
0
50,000
100,000
150,000
200,000
250,000
300,000
OVERTIME AVERAGE
Supn Staff
Clerical & Allied GradesMinor Grades & Driver
0.00
1.00
2.00
3.00
4.00
5.00
6.00
7.00
8.00
9.00
10.00
Cost
(Rs/
KWh)
Generation unit cost variation 2011
Monthly generation unit cost with depreciation Average Unit Cost with depreciation
Generation Unit cost Variation during 2011
MONTH UNIT GENERATED
(KwHr) UNIT GENERATED
(GwHr) TOTAL EXPENDITURE
(Rs) UNIT COST (Rs/KWh)
JANUARY 383,785,000.00 386.79 245,705,893.27 0.64
FEBRUARY 348,241,000.00 348.24 252,675,492.27 0.73
MARCH 227,843,000.00 227.84 257,564,725.21 1.13
APRIL 165,257,000.00 165.26 252,539,595.43 1.53
MAY 209,754,000.00 209.75 263,976,057.47 1.26
JUNE 201,549,000.00 201.55 371,655,909.06 1.84
JULY 120,045,000.00 120.05 254,556,083.23 2.12
AUGUST 78,360,000.00 78.36 268,944,623.11 3.43
SEPTEMBER 34,320,000.00 34.32 270,395,164.75 7.88
OCTOBER 56,596,000.00 56.60 285,956,487.42 5.05
NOVEMBER 91,966,000.00 91.97 280,428,179.46 3.05
DECEMBER 60,529,000.00 60.53 410,894,814.85 6.79
TOTAL 1,978,245,000.00 1,985.14 3,415,293,025.53 1.72 Average Unit cost for 2011 Rs/KWh = 1.72
Generation Unit Cost Station wise
Station
Unit Cost Rs/KWhr
Victoria 1.14 Kotmale 2.48 Ukuwela 2.07 Bowatenna 3.11 Randenigala/Rantambe 1.61 Nillambe 7.55
1.14
2.48 2.073.11
1.61
7.55
Generation Unit Cost Station wise Rs/KWhr
unit cost per station Average unit cost 1.72 Rs/KWh
Water Consumption
STATION
POWER GEN (MWh)
WATER CONSUMPTION (Mcm)
WATER CON (Mcm/GWHr)
POWER GEN (GWh)
KOT 372730 697.763 5877.73 372.730
VIC 747037 1860.745 4298.22 747.037
RAND 413775 2159.405 1956.83 413.775
RANT 205391.15 2591.724 836.64 205.391
UKU 157513 855.569 2030.58 157.513
BOW 78755 642.289 1356.96 78.755
NIL 9921.6 83.708 2481.77 9.922
Total 1985122.75 8891.203 18838.73 1985.123
0.00
500.00
1000.00
1500.00
2000.00
2500.00
3000.00
3500.00
4000.00
4500.00
5000.00
5500.00
6000.00
KOT VIC RAND RANT UKU BOW NIL
Water Consumption
WATER CON (Mcm/GWHr) POWER GEN (GWh)
Reservoir Level
STATION LEVEL MSL m
BEGINNING OF MONTH AVG
END OF MONTH
KOT 8278.28 8276.53 8274.78 VIC 5057.811 5050.317 5042.823 RAND 2667.17 2663.795 2660.42 RANT 1809.1 1809.175 1809.25 UKU 5289.85 5289.97 5290.09 BOW 2733.5 2854.455 2975.41 NIL 7136.87 7137.12 7137.37
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
KOT VIC RAND RANT UKU BOW NIL
Reservoir Data
BEGINNING OF MONTH
END OF MONTH
0100020003000400050006000700080009000
KOT VIC RAND RANT UKU BOW NIL
Average
Major jobs carried out during the Year 2011
Victoria Power Station
1. Installation & commissioning of Circuit Breaker 330 B phase pole column and operating mechanism
2. Installation & commissioning of Circuit Breaker 230 R phase pole column.
3. Repair, Installation & commissioning of Circuit Breaker 230 B phase pole column.
4. Repair of faulty CB Pole columns (02 Nos.).
5. Fabrication of new steel structures and installation of Generator Transformer Surge Arrestors.(09nos)
6. Tighten of Stator Lamination bolts & inspection of stator winding of Generator No-03.
7. Preparation works for new 220V DC Battery Bank installation in progress.
8. Installation & commissioning works of Cooling water and Strainer Motorized valves of Unit 01.
9. Preparation works for Unit-03 AVR replacement work in progress.
10. Emergency fire shower installation at switch Yard area.
11. Unit-01 Main Inlet Valve (MIV) Trunion Bearing replacement.
12. Replacement of Unit 02 trust Bearing coolers.
13. Modification of drainage water piping system & installation of drainage pump No-03
14. Painting works of penstock & tail race safety fence.
15. Jones Mobile Crane Jib repair and other Major repair works
16. Bowser Tank Repair and other Major Repair works
17. Full body Painting and interior refurbishment of following vehicles
i. Subaru Car (18-3571) ii. Nissan Urvan (GA-1600)
iii. Nissan Urvan (GA-1604)
18. Refurbishment works of building site water treatment plant.
19. Installation of new Suntel telephone system.
20. Replacement of Power Station Telephone exchange system
21. Checking & re-correction of power station schematic drawings in progress.
22. Construction of toilets at tunnel office for visitors
23. Instillation & wiring of wall mounted fans & fixing over head multimedia projector at tunnel office auditorium
24. Preparation of name boards, information boards & leaflets for power station of visitors.
25. Conducting guided tour of power station, transformer bay, tailrace, control room & switch yard and explanation of their activities for visitors.
26. Implementation of 5S concept in progress
Activities carried out at Bowatenna Power Station
1. Wiring for new telephone network 2. Installation of control panel for new workshop
1. 132 kV Circuit Breaker Repair (2011.03.20-2011.03.23)
2 Annual maintenance Runner repair (2011. April)
3 New Year Festival 2011
4 Hearing Aids Donation 2011 May( Celibration of 2600 Budha Jayanthiya)
5 Contact Eye lenses donation -2011 May ( Celibration of 2600 Budha Jayanthiya)
6. Disaster Management Program 2011 June
7. Local Government Cricket Tournament winning team (2011 November)
7. Mahaweli Complex Cricket Tournament winning Team 2011
8 Intake Gate cleaning 2011 August
9 Building of copper dam for intake gate cleaning
10 Photograph : Bowatenna Intake was blocked by debris
11 Bowatenna Power station won the 1st place in 5S competition 2011
12 Bowatenna Power station won the 1st place in 5S competition 2011
13 Bowatenna Power station won the 1st place in 5S competition 2011
14 Mitsubishi L 200 Double cab was awarded to Bowatenna Power Station for 5S winning
15 Mitsubishi L 200 Double cab was awarded to Bowatenna Power Station for 5S winning
16 Donation of a Computer for Disable student in Abana Naula
Activities carried out at Ukuwela Power Station
1. Refurbishment of Ukuwela Generator
2. Repairing of Penstock
Activities carried out at Kotmale power station
1. Installation of new Brushless excitation in Unit No.2 and No.03 generators
2. Repair of Unit No.3 Main Inlet Valve Trunion water leak
3. Installation of spare 220kV Current transformer at 220kV Switch Yard
4. Monthly Awareness Program to empower staff members
5. Distribution of dry ration package (Sahana Malla) for people receiving “Public Assistance Monthly Allowance”
6. Year end family Get together and Appreciation Ceremony – Reflection 2011
7. Participating in EXPO 2011 Exhibition and contribute to achieve Silver Award for “Stall with Highest Technological Impact”