Case study of Harmonic Analysis.ppt

Provincial Electricity Authority, Thailand 1

Case Study of Harmonics Analysis

Power Quality Provincial Electricity Authority (PEA)

Pasasorn Jan-ngoen


CONTENTS

Problem occur in factory Definition of harmonic Harmonic assessment Harmonic assessment standard Analysis of harmonic Conclusion

Name: CK Cartan Company Limited, Lam phun


Manufacture of paper and paper products

Problem occur in factory

Problem occur in factory


Fuse blow

Machine Stop

Magnetic Contactor failure

kVAr Charge


Definition of HarmonicHarmonic is the measure of waveform distortion.

Sinusoidal waveform Harmonic distortion


Harmonic assessment


Current ProbeTR 2510A

Dranetz PX5

Harmonic assessment


Harmonic assessment standard

EN50160

IEC61000-4

IEEE519

G5/4

Associated standard of Harmonic

PEA+MEA+EGAT

The harmonic regulation for the commercial and industrial (PRC-PQG-1/1998)


Voltage at PCC.

(kV)

Current distortion limits in each order(Arms)

2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

0.400 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



Voltage at PCC.(kV)

Total harmonic

distortion (%)

Total harmonic distortion in each order.(THDV%)

% Odd % Even

0.400 5 4 211,12,22 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



Analysis of harmonic



5.00% 5.00% 5.00%

2.11% 1.98%2.25%

0.00%

1.00%

2.00%

3.00%

4.00%

5.00%

6.00%

Phase A Phase B Phase C

PEA Standard PCC

THDv (%)

Tota

l har

mon

ic d

istor

tion

(%)

Total harmonic Distortion each phase compare PEA Standard between PCC.


No DFT data available

Waveform harmonics

THDH02

H03H04

H05H06

H07H08

H09H10

H11H12

H13H14

H15H16

H17H18

H19H20

H21H22

H23H24

H25

0.0

0.5

1.0

1.5

%

A VHarm B VHarm C VHarm

C reated wi th D ranV iew 6 .15.3


Component of voltage harmonic each order at peak load

5th

7th



75.17

53.24

34.45

87.7

17.23

62.64

14.09 12.53 10.96

29.75

9.4

25.06

7.83 7.83 7.83 9.46.26

9.4

1.61

13.75

0.97

24.01

0.41

13.76

0.412.96

0.25

4.99

0.22 1.33 0.16 0.54 0.15 0.56 0.15 0.380

10

20

30

40

50

60

70

80

90

100

2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th 12th 13th 14th 15th 16th 17th 18th 19th

PEA Standard PCC

Order of harmonic

Cur

rent

dist

ortio

n lim

ited

(Arm

s)

current harmonic each order compare PEA Standard between PCC.


No DFT data available

Waveform harmonics

THDH02

H03H04

H05H06

H07H08

H09H10

H11H12

H13H14

H15H16

H17H18

H19H20

H21H22

H23H24

H25

0

1

2

3

4

5

%

A IHarm B IHarm C IHarm

C reated wi th D ranV iew 6.15.3

Component of current harmonic each order at peak load


5th

7th



Capacitor Bank

Fuse Magnetic Contactor

Failure

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

Case study of Harmonic Analysis.ppt

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