ABSTRACT:
In this paper,
experimental study of Sliding Mode Controller (SMC) DC bus voltage of three
phase shunt active power filter (APF), to improve power quality by compensating
harmonics and reactive power required by nonlinear load is proposed. The
algorithm used to identify the reference currents is based on the Self Tuning
Filter (STF). For generation of the pulse switching of the IGBTs inverter the
hysteresis current controller is used, implemented into an analogue card.
Finally, various experimental results are presented under steady state and transient
conditions.
KEYWORDS:
1. Shunt Active Power Filter (APF)
2. Total
Harmonic Distortion (THD)
3. Sliding Mode
Controller (SMC)
4.
Self Tuning Filter (STF)
SOFTWARE:
MATLAB/SIMULINK
\
Fig.
1: The basic compensation principle of the shunt APF.
\
Fig.
2. Experimental APF results: load current iL (A), filter current iF (A)
and
source current iS (A). Ch1 to Ch4 scale: 5 A/div. Time scale: 20 ms/div.
\
Fig.
3. Experimental APF results: load current iL (A), filter current iF (A),
source
current iS (A) and source voltage Vs (V). Ch1 and Ch3 scale: 5 A/div;
Ch2
scale: 100 V/div;Ch4 scale: 80 V/div; Time scale: 10 ms/div.
\
Figure
4. Experimental APF results : load current iL(A), filter current iF(A) ,
source
current iS(A) and DC voltage Vdc(V). Ch1,Ch3 and Ch4 scale: 10
A/div.
Ch2 scale: 100 V/div. Time scale: 20 ms/div.
\
Figure
5. Experimental APF results: DC voltage Vdc (V) and DC reference
voltage
V*dc (V). Ch1 and Ch2 scale: 100 V/div. Time scale: 1s/div
CONCLUSION:
The control of the shunt Active Power
Filter was divided in three parts, the first one realized by the dSPACE system
to generate the reference currents, the second one achieved by an analogue card
for the switching pattern generation, implementing a hysteresis current
controller and the third party use a sliding mode controller SMC. A SMC
controlled shunt active power filter has been studied to improve the power
quality by compensating both harmonics and reactive power requirement of the
nonlinear load. The performance of the SMC controller has been developed in
real time process and successfully tested in the laboratory The results of
experiment study of APF control technique presented in this paper are found
quite satisfactory to eliminate harmonics and reactive power components from utility
current. The shunt APF presented in this paper for the compensation of harmonic
current components in non-linear load was effective for harmonic isolation and
keeping the utility supply line current sinusoidal. The validity of this technique
was proved on the basis of experiment results. The APF is found effective to
meet IEEE- 519-1992 standard recommendations on harmonics levels.
REFERENCES:
[1] Chaoui; J.P.Gaubert; F.Krim; G.Champenois,
“PI Controlled Threephase Shunt Active Power Filter for Power Quality
Improvement” A. “Electric Power Components and Systems, 1532-5016, Volume 35, Issue
12, 2007, Pages 1331 – 1344.
[2] D. Benatous, R. Abdessemed, “Digital
voltage control of AC/DC PWM Converter with improved power factor and supply
current ”, Journal of electric machines and power systems, Taylor and francis, 2000.
[3] G. A. Capolino, A. Golea, H. Henao, “Système
de réduction des perturbations réseau pour commande vectorielle ”, Proc. Colloque
SEE Perturbations Réciproques des Convertisseurs et des Réseaux, Nantes, 6 juillet
1992.
[4] M. Abdusalam, P. Poure and S.
Saadate,’’ A New control scheme of hybrid active filter using Self-Tuning
Filter,’’ POWERENG, International Conference on Power Engineering , Energy and
Electrical Drives, Setubal Portugal,12-14 April (2007).
[5] M. Abdusalam, P. Poure and S.
Saadate, « Study and experimental +6validation of harmonic isolation based on
Self-Tuning-Filter for threephase active filter ». ISIE, IEEE International
Symposium on Industrial Electronics, Cambridge, UK, (2008).
