system operation and settlement mechanism - nuwani.pdf · system operation and settlement mechanism...
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System Operation and Settlement Mechanism
Cross Border Trade/Regional Power Marketin South Asia
10-11 December, 2017Dhaka, Bangladesh
Present By:B.G. GeethaniChief Engineer (System Operations)
H.K.N.W. KodithuwakkuElectrical Engineer(Energy Marketing)
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SRI LANKAN POWER SECTOR 2016
Installed capacity 4018 MW
Peak Demand 2483 MW
Electricity Generated 14249 GWh
System Losses 10.28 %
Elec. Consumption per Capita 603 kWh
Level of Electrification 98.71%
(June 2016)
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SRI LANKAN POWER SECTOR 2016
CEB Own Power Plant
Hydro 1,384
Thermal Oil 604
Thermal Coal 900
Other Renewable Energy 3
Installed Capacity in MW
Private Power Purchase
Mini-Hydro 342
Thermal 611
ORE –Wind 128
ORE –Other 45
TOTAL Installed Capacity 4018 MW
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SRI LANKAN POWER SECTOR 2016
Plant NameCapacity
(MW)Annual Energy (GWh)
CEB Hydro 1390 3498.7
CEB Thermal - Coal 900 5066.8
CEB Thermal - Oil 606 2360.2
IPP Thermal 652 2163.8
Other RE 516 1158.1
CEB Hydro34%
CEB Thermal
15%
CEB Coal22%
IPP Thermal
16%
Other RE
13%
Capacity Share in 2016
CEB Hydro24%
CEB Thermal
17%CEB Coal
36%
IPP Thermal
15%
Other RE8%
Energy Share in 2016
Capacity Mix and Energy Mix
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SRI LANKAN POWER SECTOR 2016
Transmission and Distribution Losses 9.63%
Load Factor 65.67%
Avg. Cost per unit (at selling point) 18.09 Rs./kWh
Avg. selling price 16.18 Rs./kWh
Recoded Maximum peak Demand 2453 MW
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SRI LANKAN STATISTICS –POWER SECTOR
Per Capita Electricity Consumption (2004-2016)
Installed Capacity and Peak Demand GDP Growth % & Elec. Demand Growth %
0
400
800
1200
1600
2000
2400
2800
3200
3600
4000
4400
19
96
19
97
19
98
19
99
20
00
20
01
20
02
20
03
20
04
20
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20
06
20
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20
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20
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20
11
20
12
20
13
20
14
20
15
20
16
Inst
. C
ap
aci
ty &
Pe
ak
Dem
an
d (M
W)
Year
Total Installed Capacity Peak Demand
0
100
200
300
400
500
600
700
2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016
kWh
/Per
son
Year
The per capita electricity consumption in 2016 was 603 kWh/person.
-20.0
-15.0
-10.0
-5.0
0.0
5.0
10.0
15.0
20.0
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
Gro
wth
Rate
(%
)
Year
GDP Electricity
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Typical Load Curve of Sri LankaDaily Load Curve as at 08th March 2017
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Actual Average Unit Cost of Electricity Generation 2016/2017 Nov
2.32
6.58
17.59
24.34
28.37
2.80
8.91
19.60
25.3626.75
0
5
10
15
20
25
30
CEB Hydro CEB Coal RenewableTechnology
CEB Thermal IPP thermal
Un
it G
en
erat
ion
Co
st (
Rs/
kWh
)
2016 20172016 2017 2016 2017 2016 2017 2016 2017
Average cost at selling point in 2016 = 18.09
Average cost at selling point in 2015 = 15.06
Average cost at selling point in 2017= 19.75
Average Selling Price in 2017 Nov (Rs/kWh ) 16.12CEB Coal price excludes financial cost
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Present Transmission Network
Transmission LinesLength
(km)
220 kV, Double circuit 582
220 kV, Single Circuit 20
132 kV, Four Circuit 4
132 kV, Double Circuit 1842
132 kV, Single Circuit 415
132 kV UG cable 50
DescriptionNumber of
GSS
Total
Capacity
(MVA)
Grid Substations
132/33 kV 55 4222
220/132/33 kV 4 1600/380
220/33 kV 1 75
132/11 kV 5 369
220/132kV 4 1405
Reactive Power Sources
Capacitors (BSC) 310 Mvar
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Operation Criteria
• Frequency• Normal Condition : 50.5 to 49.5Hz (±1%)• Under Emergency : 52 to 47Hz
• Voltage• 220/132kV : ±10%• 33kV : ±2%
• Max. Dispatch Unit Size : 25% of Demand
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LONG TERM GENERATION EXPNASION PLAN 2018-2037
Energy and Peak Demand – Actual/Forecast
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
0
5000
10000
15000
20000
25000
30000
35000
40000
45000
50000
De
man
d (
MW
)
Ener
gy (
GW
h)
Generation
Peak Demand
ForecastActual
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LONG TERM GENERATION EXPNASION PLAN 2018-2037
Base Case Energy Mix by 2030 (Revised Base Case LTGEP 2018-2037 as per Oversight Committee on Energy)
Renewable, 34%
Thermal Coal, 41%
Thermal Oil, 0%
Thermal LNG, 23%
PSPP, 2%
Energy Mix 2030
Renewable
Thermal Coal
Thermal Oil
Thermal LNG
PSPP
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LONG TERM GENERATION EXPNASION PLAN 2018-2037
Generation Planning Capacity Additions
During the planning horizon of next 20 years:
Thermal Based Power Plants(Coal/LNG/GTs/Reciprocating Engines)
4500 MW
Major Hydro 240 MW
Pumped Hydro 600 MW
Other Renewable Energy (Wind, Solar, Mini Hydro and Biomass)
2800 MW
Wind Solar Mini Hydro Biomass
1200 MW 1300 MW 220 MW 100 MW
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Transmission Network Improvement2017 2027
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Future Options-conventional Generation
HVDC Link Between Sri Lanka and India
• Technical and Economical feasibility studies are carried out between CEB andPower Grid India to interconnect two Networks by DC link.
• Project to be expedite as soon as the completion of the Feasibility Studies.
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HVDC Link Between Sri Lanka and India
Scope of work for feasibility study of the project was :
2x500MW HVDC terminal stations each at Madurai-New (India) and Anuradhapura-New (Sri Lanka) along with HVDC bipole line: 360km
• Overhead Line (India): Madurai (New) to Panaikulam: 130km • Submarine Cable: Panaikulam (India) to Thirukketiswaram (SL): 120km• Overhead Line (SL): Thirukketiswaram to Anuradhapura (New): 110km
The tentative costing of above option was estimated to be USD 1031 Millionfor conventional HVDC and USD 1110 Million for VSC based HVDC
at Feb 2012 price level.
Background
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HVDC Link Between Sri Lanka and India
Further, to reduce the cost of the interconnection, a revised route was considered with reduced length of the Submarine Cable (40km) with following scope:
2x500MW HVDC terminal stations each at Madurai-New (India) and New Anuradhapura (Sri Lanka) alongwith HVDC bipole line: 370km
• Overhead Line (India): Madurai (New) to near Dhanushkodi: 180km • Submarine Cable: Dhanushkodi (India) to Talaimannar (SL): 40km• Overhead Line (SL): Talaimannar to Anuradhapura (New): 150km
The tentative costing of revised option was estimated to be USD 515 Million for conventional HVDC and USD 564 Million for VSC based HVDC
at Apr 2016 price level.
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HVDC Link Between Sri Lanka and India
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HVDC Link Between Sri Lanka and India
• Studies are carrying out for following Three Options
Current Status
Option 1:
2x500MW HVDC terminal stations each at Madurai-New (India) and New Habarana (Sri
Lanka) along with HVDC bipole line: 410km
1. Overhead Line (India): Madurai(New)* to Panaikulam: 130km
2. Submarine Cable: Panaikulam (India) to Thirukketiswaram (SL): 120km
3. Overhead Line (SL): Thirukketiswaram to New Habarana: 160km
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HVDC Link Between Sri Lanka and India
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HVDC Link Between Sri Lanka and India
Option2:
2x500MW HVDC terminal stations each at Madurai-New (India) and New Habarana
(Sri Lanka) along with HVDC bipole line: 420km
1. Overhead Line (India): Madurai (New)* to near Dhanushkodi: 180km
2. Submarine Cable: Dhanushkodi (India) to Talaimannar (SL): 40km
3. Overhead Line (SL): Talaimannar to New Habarana: 200km
Current Status
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HVDC Link Between Sri Lanka and India
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HVDC Link Between Sri Lanka and IndiaCurrent Status
Option 3:
2x500MW HVDC terminal stations each at Madurai-New (India) and
Thirukketiswaram (Sri Lanka) along with HVDC bipole line: 410km (Map at
Exhibit-4)
1. Overhead Line (India): Madurai(New)* to near Dhanushkodi: 180km
2. Submarine Cable: Dhanushkodi (India) to Thirukketiswaram (SL): 70km
3. Overhead Line (SL): Thirukketiswaram to New Habarana: 160km
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HVDC Link Between Sri Lanka and India
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Thank You..!