“thailand energy efficiency
TRANSCRIPT
Dr. Somchai Songsiri
Acting Director
Engineering Department
PEA, ThailandPage 1
“Thailand Energy Efficiency
Improvement Project for Distribution
Transformers : PEA’s Perspective”
Page 2
Conten
t
PEA’s Customer
PEA Electric supply
and losses
Transformers in
PEA system
PEA’s transformer
Efficiency
Losses improvement
Rational
PEA’s Rational
Page 3
o Electrical losses is one of KPI that the Government used to evaluate
PEA business performance
o PEA’s electrical network losses is trended to slightly increase during
last 10 years
o Losses in distribution transformer is highly contributed in the total
technical losses
o Almost half of PEA’s distribution transformers is single-phase and
less capacity which is low efficiency compared to the three-phase
and bigger ones
o There is the big potential Gap to reduce losses in the distribution
transformer by improving efficiency of new transformers in
investment plan that can obtain long-term benefit over life cycle
PEA’s Customer
Page 4
PEA Electric supply and losses
Page 5
Page 6
Technical losses in PEA system
3.5-
13.8
kV
230-
500 kV
22-115
kV
230 V, 1-
phase
400 V, 3-
phase
69-230
kV
22-33
kV
Average from 2013-2016
% Technical losses = 3.795 of Electric supply
Numbers of total transformers in PEA system
Page 7
Page 8
PEA56%
Single Phase Three Phase
Numbers of total transformers in PEA system
Page 9
Single Phase Three Phase
Private sector44%
Numbers of total transformers in PEA system
Page 10
Purchased Transformer
With ability to withstand short circuitWithout ability to withstand short circuit
22 kV system
Stop purchasing 3-phase DT without
S/C withstand ability in year 2018
Page 11
Purchased Transformer
With ability to withstand short circuitWithout ability to withstand short circuit
33 kV system
Stop purchasing 3-phase DT without
S/C withstand ability in year 2018
PEA’s losses VS BS EN 50464-1
No-Load Losses (W) Load Losses (W)
Page 12
Losses improvement will be improve to B0 and Bk criteria
according to BS EN 50464-1 in year 2018
Page 13
PEA’s transformer efficiency at 50% loading
50 100 160 250 315 400 500 630 800 1,000 1,250 1,500 2,000
July, 2018 98.70 98.93 99.06 99.17 99.21 99.26 99.30 99.34 99.37 99.37 99.38 99.38 99.37
2017 98.43 98.74 98.91 99.02 99.07 99.13 99.17 99.22 99.09 99.15 99.18 99.17 99.25
97.80
98.00
98.20
98.40
98.60
98.80
99.00
99.20
99.40
99.60
Effi
cien
cy a
t 5
0%
load
ing
July, 2018
2017
Page 14Transformer efficiency at 50% load
Where’s PEA now?
Average
Page 15
Where’s PEA after July 2018 ?
Average
Page 16
Where’s PEA after July 2018 compared to EU ?
50 100 160 250 315 400 500 630 800 1,000 1,250 1,600 2,000
EU Tear1, July 2015 99.28 99.42 99.50 99.56 99.58 99.61 99.62 99.65 99.66 99.66 99.70 99.71 99.70
PEA, July 2018 98.70 98.93 99.06 99.17 99.21 99.26 99.30 99.34 99.37 99.37 99.38 99.38 99.37
98.00
98.20
98.40
98.60
98.80
99.00
99.20
99.40
99.60
99.80
Effi
cie
ncy
at
50
% lo
adin
g (%
)
EU Tear1, July 2015
PEA, July 2018
Page 17
50 100 160 250 315 400 500 630 800 1,000 1,250 1,600 2,000
EU Tear2, July 2021 99.47 99.56 99.61 99.57 99.68 99.70 99.71 99.73 99.74 99.74 99.74 99.75 99.75
PEA, July 2018 98.70 98.93 99.06 99.17 99.21 99.26 99.30 99.34 99.37 99.37 99.38 99.38 99.37
98.00
98.20
98.40
98.60
98.80
99.00
99.20
99.40
99.60
99.80
100.00
Effi
ece
ien
cy a
t 5
0%
load
ing
(%)
EU Tear2, July 2021
PEA, July 2018
Where’s PEA after July 2018 compared to EU ?
Page 18
Saving due to loss improvement
45,222,736
185,673,537
210,674,496
In 2018
Assumption : average Life span 20 years
Page 19
Purchasing Plan (2019 – 2024)
Power Rating (kVA) Purchased Transformer
(Units)
Purchased Transformer
(Units)
50 4378 701
100 7272 905
150 3276 739
200 1634 311
22 kV 33 kV
Saving due to loss improvement
256,373,163
312,134,011
280,768,499
Page 20
Purchasing Plan (2019 – 2024)
Assumption : average Life span 20 years
Conclusion
Page 21
o PEA is the biggest customer purchasing the distribution
transformers in Thailand so the movement on quality and efficiency
improvement will influence the markets and industries as well as
energy efficiency policy and impact to the private customers
o To promote the energy efficiency transformers in Thailand needs
the strong support from the Government Agencies to set up Law and
procedure to enforce and protect the end users from false
transformer or dishonest manufacturers
o The close coordination among the Government Agencies, the
electric utilities, the manufacturers and private end-users is one of
the key success factors to establish the energy efficiency of the
distribution transformers and other major electrical equipment as
well
Page 22
Q&A