Case Study of Harmonics Analysis

Case Study of
Harmonics Analysis
Pasasorn Jan-ngoen
Power Quality
Provincial Electricity Authority (PEA)
Provincial Electricity Authority, Thailand
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CONTENTS
 Problem occur in factory
 Definition of harmonic
 Harmonic assessment
 Harmonic assessment standard
 Analysis of harmonic
 Conclusion
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Problem occur in factory
Name: CK Cartan Company
Limited, Lam phun
Manufacture of paper and
paper products
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Problem occur in factory
Fuse blow
Magnetic Contactor
failure
Machine Stop
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kVAr Charge
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Definition of Harmonic
Harmonic is the measure of waveform distortion.
Sinusoidal waveform
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Harmonic distortion
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Harmonic assessment
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Harmonic assessment
Current Probe
TR 2510A
Dranetz PX5
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Harmonic assessment standard
EN50160
IEEE519
IEC61000-4
G5/4
Associated standard of
Harmonic
PEA+MEA+EGAT
The harmonic regulation for the
commercial and industrial (PRC-PQG-1/1998)
Provincial Electricity Authority, Thailand
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The harmonic regulation for
the commercial and industrial (PRC-PQG-02/1998)
Voltage
at PCC.
(kV)
Current distortion limits in each order(Arms)
7
8
9 10 11 12 13 14 15 16 17 18 19
48 34 22 56 11 40
9
8
7
19
6
16
5
5
5
6
4
6
11,12,22
and 24
13
8
6
10
4
8
3
3
3
7
2
6
2
2
2
2
1
1
33
11
7
5
9
4
6
3
2
2
6
2
5
2
1
1
2
1
1
69
8.8
5.9
4.3
7.3
3.3
4.9
2.3
1.6
1.6
4.9
1.6
4.3
1.6
1
1
1.6
1
1
115 and
more than
5
4
3
4
2
3
1
1
1
3
1
3
1
1
1
1
1
1
0.400
2
3
4
5
6
Provincial Electricity Authority, Thailand
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The harmonic regulation for
the commercial and industrial (PRC-PQG-02/1998)
Voltage at
PCC.
(kV)
Total
harmonic
distortion (%)
0.400
Total harmonic distortion in each
order.(THDV%)
% Odd
% Even
5
4
2
11,12,22 and 24
4
3
1.75
33
3
2
1
69
2.45
1.63
0.82
115 and more than
1.5
1
0.5
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Analysis of harmonic
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Analysis of harmonic
Total harmonic Distortion each phase compare PEA Standard
between PCC.
6.00%
Total harmonic distortion (%)
5.00%
5.00%
PEA Standard
5.00%
5.00%
PCC
4.00%
3.00%
2.11%
2.00%
1.98%
2.25%
1.00%
0.00%
Phase A
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Phase B
THDv (%)
Phase C
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Analysis of harmonic
Waveform harmonics
%
Component of voltage harmonic
each order at peak load
5th
1.5
7th
1.0
0.5
0.0
THD
H03
H02
H05
H04
H07
H06
H09
H08
H11
H10
H13
H12
A VHarm
B VHarm
H15
H14
H17
H16
H19
H18
H21
H20
H23
H22
H25
H24
C VHarm
No DFT data available
C reated wi th D ranV iew 6 .15.3
Provincial Electricity Authority, Thailand
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Analysis of harmonic
current harmonic each order compare PEA Standard between PCC.
100
Current distortion limited (Arms)
90
80
87.7
75.17
PEA Standard
PCC
70
62.64
60
53.24
50
40
34.45
29.75
30
25.06
24.01
20
17.23
13.76 14.09
13.75
12.53
10
1.61
0
2nd
0.97
3rd
4th
0.41
5th
6th
2.96
0.41
7th
8th
9th
10.96
9.4
7.83
4.99
0.25
10th
0.22
11th
12th
1.33
13th
0.16
14th
7.83
0.54
15th
7.83
0.15
16th
9.4
9.4
6.26
0.56
17th
0.15
18th
0.38
19th
Order of harmonic
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Analysis of harmonic
Wav eform harmonics
%
Component of current harmonic
each order at peak load
5
4
5th
3
7th
2
1
0
THD
H03
H02
H05
H04
H07
H06
H09
H08
H11
H10
H13
H12
A IHarm
B IHarm
H15
H14
H17
H16
H19
H18
H21
H20
H23
H22
H25
H24
C IHarm
No DFT data available
C re ated wi th D ranV iew 6.15.3
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Analysis of harmonic
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Analysis of harmonic
Fuse
Capacitor Bank
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Magnetic
Contactor
Failure
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CONCLUSION
 In this case use the harmonic regulation for
the commercial and industrial.
Background of THDv and THDi following with
standard.
Should be installation detune, tune, active
filter for improvement system.
Thank you
Provincial Electricity Authority, Thailand
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