15-19 October 2012 at Bali Nusa Dua Convention Center (BNDCC) Nusa Dua - Bali, Indonesia19th Conference of the Electric Power Supply Industry (CEPSI 2012) co-author: W,Tirakhan

1. October 19th, 2012 ECONOMICS
Parichart Suttiprasit
Electricity Generating Authority of Thailand (EGAT)
CEPSI 2012 PERFORMANCE
EFFECTIVE
ASSET
MANAGEMENT
Leading the way to Operational Excellence 2011

2. Introduction
2

3. Leading the way to Operational Excellence 2011 3

4. Fuel Cost
(THB kWh)
Replacement
Energy Gain
Merit Order
Must Run
Must
Take Marginal
Plant
Electricity Demand
Coal Natural
Gas Oil
A B C D E F G H I J K L M N O P Q R S T U V W
Power Plants
4

5. Duration Correct
Extend? Seal !
OEM
Supervisor
EGAT
How much are
we losing?
Leading the way to Operational Excellence 2011 5

6. Outlines
Planned
Outage: off-
grid
Operation: on-
grid
Conclusion

7. Scheduling
Executing
Function Test
Leading the way to Operational Excellence 2011

8. Scheduling Unit:
Baht /day
8

9. Unit:
Scheduling Baht /day
Year 2012
AA-C20 11.18
Mar April May June
8.18 11.18 11.85 6.75
9

10. Unit:
Scheduling Baht /day
Year 2012
AA-C20 11.18
Leading the way to Operational Excellence 2011 10

11. Performance Planning
 Decrease of Efficiency
Heat Rate (kJ/kWh)
10300 - 10285.72
10250 -
10216.37
10200 -
Current
19 199 199 200 200 200 2008
95 6 9 1 3
Operation Time (year) 2010
6
Assumption: Heat rate has been constantly increased since 1995.
Source: EGAT production efficiency division, 2006

12. Decision Making
Before Outage
“If main turbine do not overhaul (not remove rotor)”
Availability Payment
+ Revenues Executing
Energy Payment
Critical Path Management
Replacement
EP
EP
Entire Asset
Fuel Cost - Energy Cost
$3.3 M USD
- Cost
Performance
O&M Cost + Lost
- Capital Maintenance $2.3 M USD
-
Charge Cost
Reference: $0.5 M USD
Parichart, S. (2008) Outage optimization of steam turbine and auxiliaries. 12
Proceedings of 17th Conference of the Electric Power Supply Industry (CEPSI 2008), October. Macao.

13. Unit:
Executing Baht /day
Year 2012
AA-C20 11.18
Mar April May June
Duration
8.18 11.18 11.85 6.75
Extend?
Critical Path Management 13

14. Scheduling
Executing
Function Test
Leading the way to Operational Excellence 2011

15. Economic Profit (EP) Driver Tree
Strategic Improvement Plan (SIP)
Leading the way to Operational Excellence 2011 15

16. EP Driver Tree &
SIPs
EE-C2
CWPs, CT efficiency Increase
AA-T1-4
Fuel Optimize
BB-C3
Exhaust Gas Temp. Increase
Station Service Reduction :
AA-T2-4, BB-C3-4
Adjust Fan Blade Angle
CC-T1-10
Pump Speed Reduce
DD-H1-5
Mini Hydro Turbine Install
14

17. Strategic Improvement Plans
Year 2012 Forecasted economic profit (rE
Fuel
Reduction
Economic kWh
increment
Profit
PPA
15

18. 358.4
WN-C3 TIAC system
BPK-T2-4, BPK-C3-4 MM-T4- 0.6
13 Station Service
2.3
SNR-1-5 Mini. Hydro TB
0.71
Economic kWh
increment
Profit 408 45.3 *
Outside CAH
PPA 16
Remark: *estimate only generation from Hydro Power Plants according to Internal Power Purchase Agreement

19. 399 * SB-C2 CWPs, CT 4.4
WN-C3 TIAC system
BPK-T2-4, BPK-C3-4 MM-T4- N/A BPK-T1-4
Fuel •Min. Gen., 59.4 *
13 Station Service
SNR-1-5 Mini. Hydro TB 1.7 * Reduction
•Fuel Optimize (Mixed Fire)
3.26
BPK-C3
0.5 Exhaust Gas Temp. Increase
4.0
534
Economic 61.9 *
Profit SB-C3
Online Filter
Change
This economic profit is one part of the whole
Fuel Gain of Generation deputy.
Remark:
PPA
* present the fuel savings from both individual Power Plants and
Replacement Energy Gain of all power plants 17

20. Strategic Improvement Plans
Year 2012 Forecasted economic profit (rE
Fuel
Reduction
534
Economic kWh
increment
Profit 408
Total Economic Profit = 942 M THB
PPA
18

21. Conclusion
1. Dividing 2 groups: PO and Operation
Key functions are changed depending on duration
Replacement Energy
2. PO duration ; Gain/Loss
Key function : Scheduling->Executing->Function Test
3.Operation duration; Key function is Efficiency & Productivity
Critical Equipment EP driver tree and SIPs
Series Type are applied
Leading the way to Operational Excellence 2011 19

22. • Parichart Suttiprasit
• parichart.su@egat.co.th
• Electricity Generating Authority of Thailand
(EGAT)
Leading the way to Operational Excellence 2011