ABSTRACT:
The
purpose of this paper is to present a harmonic mitigation using a shunt active
filter with accurate harmonic current identification and compensation based on
instantaneous active and reactive power theory and a self-tuning filter for the
harmonic isolation and a fuzzy hysteresis band technique for the current
control. In order to find the best strategy for the power quality improvement,
a comparative study has been illustrated. The Analysis and simulation results
using Matlab/Simulink confirm the effectiveness and limits of the proposed
methods and also show the performances of fuzzy logic control which provides flexibility,
high precision and fast response.
KEYWORDS:
1. Active
power filter (APF)
2. Fuzzy
logic control
3. THD
4. Harmonic
5. Hysteresis-band
control
6. Power
quality
SOFTWARE: MATLAB/SIMULINK
Figure
1. Active Power Filter
Figure
2. Harmonic compensation with p-q theory and fuzzy hysteresis band control
Fig 3.Source
current's harmonic spectrum (p-q theory)
Figure
4. Harmonic compensation with STF theory and fuzzy hysteresis band
control
Figure
5. Source current's harmonic spectrum (STF)
Figure
6. The DC voltage
CONCLUSION:
In
this paper the quality of the energy is improved by using the active filtering.
A model of shunt active power filter is illustrate with its control strategy
based on the p-q theory concept and a STF using fuzzy logic current control,
the developed techniques shown excellent performances in harmonics mitigation
and reactive power compensation. The comparative evaluation proved that the STF
gives better quality filtering then the conventional p-q theory which is the
main objective to be achieved. To confirm the efficiency of this solution and
to improve the system response experimental application and others techniques
as Neuro-fuzzy control can be developed.
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[1]
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[3]
R. BELAIDI, M.HATTI, A HADDOUCHE, M. M. LARAFI, "Shunt active power filter
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[4]
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[5]
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