Vladimir Ćuk*, Sjef Cobben*, Wil L. Kling*, Roelof B. Timens**
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Frankfurt (Germany), 6-9 June 2011 Vladimir Ćuk*, Sjef Cobben*, Wil L. Kling*, Roelof B. Timens** TU Eindhoven – The Netherlands, ** Universiteit Twente – The Netherlands Presenter: Dr.ir. G.M.A. Vanalme TU Eindhoven The Netherlands Session: Power Quality and Electromagnetic Compatibility Paper 0580 ANALYSIS OF HARMONIC CURRENT INTERACTION IN AN INDUSTIAL PLANT
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ANALYSIS OF HARMONIC CURRENT INTERACTION IN AN INDUSTIAL PLANT. Vladimir Ćuk*, Sjef Cobben*, Wil L. Kling*, Roelof B. Timens** TU Eindhoven – The Netherlands, ** Universiteit Twente – The Netherlands Presenter: Dr.ir. G.M.A. Vanalme TU Eindhoven The Netherlands - PowerPoint PPT Presentation
Transcript of Vladimir Ćuk*, Sjef Cobben*, Wil L. Kling*, Roelof B. Timens**
Frankfurt (Germany), 6-9 June 2011
Vladimir Ćuk*, Sjef Cobben*, Wil L. Kling*, Roelof B. Timens**
TU Eindhoven – The Netherlands, ** Universiteit Twente – The Netherlands
Presenter: Dr.ir. G.M.A. Vanalme
TU Eindhoven
The Netherlands
Session: Power Quality and Electromagnetic Compatibility
Paper 0580
ANALYSIS OF HARMONIC CURRENT INTERACTION IN AN INDUSTIAL PLANT
Frankfurt (Germany), 6-9 June 2011
Paper 0580
Introduction
Current transients in the factory lighting system A Variable Speed Drive (VSD) is causing voltage notchesPossible resonance?
Frankfurt (Germany), 6-9 June 2011
Paper 0580
Lamp current in one phase
Frankfurt (Germany), 6-9 June 2011
Paper 0580
Current in all three regimes
0 0.005 0.01 0.015 0.02-300
-200
-100
0
100
200
300
time [s]
lam
p c
urr
en
t [A
]
Regime ARegime BRegime C
Frankfurt (Germany), 6-9 June 2011
Paper 0580
Voltage in all three regimes
0 0.005 0.01-50
0
50
100
150
200
250
300
350
time [s]
Vo
ltag
e [V
]
Regime ARegime BRegime C
Frankfurt (Germany), 6-9 June 2011
Paper 0580
THDs over 20 ms periods
0 0.5 1 1.5 2 2.5 30
1
2
3
4
5
6
7
Time [s]
Vo
ltag
e T
HD
[%]
Voltage THD
0 0.5 1 1.5 2 2.5 3
10
20
30
40
50
60
70
80
90
Cu
rre
nt T
HD
[%]
Current THD
Frankfurt (Germany), 6-9 June 2011
Paper 0580
Voltage harmonics
Frankfurt (Germany), 6-9 June 2011
Paper 0580
Current harmonics
Broadband distortion – not a resonance problem
Frankfurt (Germany), 6-9 June 2011
Paper 0580
Calculated load impedance
0 500 1000 1500 2000 25000.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
0.5
frequency [Hz]
Lo
ad
imp
ed
an
ce [O
hm
]
Low impedance at highorders causes high currents
Cable inductance increases theimpedance at the end of the plot
Frankfurt (Germany), 6-9 June 2011
Paper 0580
Laboratory measurements
0 0.005 0.01 0.015 0.02-3
-2
-1
0
1
2
3
t [s]
I [A
]
Current with a clean voltage supply
Peak current 3 A
Frankfurt (Germany), 6-9 June 2011
Paper 0580
Current spectrum with a clean voltage
3rd harmonic
5th harmonic
Frankfurt (Germany), 6-9 June 2011
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Simulated low distortion condition
Peak current 4 A
Frankfurt (Germany), 6-9 June 2011
Paper 0580
Simulated higher voltage distortion
Peak current 9 A
Frankfurt (Germany), 6-9 June 2011
Paper 0580
Simulated highest voltage distortion
Peak current up to 20 A
More oscillations than in the field – limited bandwidth of the source
Frankfurt (Germany), 6-9 June 2011
Paper 0580
Harmonic fingerprint – 3rd harmonic
Current harmonics even with a clean voltage, butlinear response to voltage harmonics!
Frankfurt (Germany), 6-9 June 2011
Paper 0580
Lamp impedance – lab. measurement
Fitted curve C = 47.7 μF
Frankfurt (Germany), 6-9 June 2011
A parallel resonance is not being excited
Peaks are caused buy harmonic distortion – notch shape is not important, similar behavior with other shapes
These lamps create harmonics, but react linearly to voltage harmonics – parallel capacitance (compensation)
Solution – electrical separation
Paper 0580
Conclusions
