Power quality improvement using fuzzy logic controller for five-level shunt active power filter under distorted voltage conditions

doi:10.1007/s11708-013-0284-4

Front. Energy

2014, Vol. 8

Issue (2) : 212-220 https://doi.org/10.1007/s11708-013-0284-4

RESEARCH ARTICLE

Power quality improvement using fuzzy logic controller for five-level shunt active power filter under distorted voltage conditions

Amar BENAISSA^1,^*(

),Boualaga RABHI²,Ammar MOUSSI³

1. Department of Electrical Engineering, University of Djelfa, B.P.3117, Djelfa 17000, Algeria
2. SE Laboratory, University of Biskra, B.P.145, Biskra 07000, Algeria
3. ARHYS Laboratory, University of Biskra, B.P.145, Biskra 07000, Algeria

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Abstract

In this paper, a five-level inverter is used as a shunt active power filter (APF), taking advantages of the multilevel inverter such as low harmonic distortion and reduced switching losses. It is used to compensate reactive power and eliminate harmonics drawn from a thyristor rectifier feeding an inductive load (RL) under distorted voltage conditions. The APF control strategy is based on the use of self-tuning filters (STF) for reference current generation and a fuzzy logic current controller. The use of STF instead of classical extraction filters allows extracting directly the voltage and current fundamental components in the α-β axis without phase locked loop (PLL). The MATLAB fuzzy logic toolbox is used for implementing the fuzzy logic control algorithm. The obtained results show that the proposed shunt APF controller has produced a sinusoidal supply current with low harmonic distortion and in phase with the line voltage.

Keywords active power filter (APF) harmonics isolator distorted voltage conditions self-tuning filters (STF) fuzzy logic control

Corresponding Author(s): Amar BENAISSA

Issue Date: 19 May 2014

Cite this article:

Amar BENAISSA,Boualaga RABHI,Ammar MOUSSI. Power quality improvement using fuzzy logic controller for five-level shunt active power filter under distorted voltage conditions[J]. Front. Energy, 2014, 8(2): 212-220.

URL:

https://academic.hep.com.cn/fie/EN/10.1007/s11708-013-0284-4
https://academic.hep.com.cn/fie/EN/Y2014/V8/I2/212

Fig.1 Power system configuration

Tab.1 The five voltage values

Fig.2 STF tuned to the pulsation w_c

Fig.3 Block diagram of STF-based harmonic isolator

Fig.4

Tab.2 Switching states of one five-level phase leg

Fig.5 PWM block diagram of current control

Fig.6 Fuzzy controller synoptic diagram

Fig.7 Structure of bridge balancing

Tab.3 Fuzzy control rule table

Tab.4 Simulation parameters

Fig.8 Switching pulses of APF arms (T₁₁, T₁₅)

Fig.9 Supply voltage v_s_a waveform

Fig.10 Supply current i_s_a waveform without filtering

Fig.11 Supply current i_s_a waveform with filter

Fig.12 Power factor correction v_s_a, i_s_a

Fig.13 Active filter current i_f_a

Fig.14 APF output voltage v_ab (line to line) for a five-level with PDPWM

Fig.15 DC voltage of the condensers v_dc

Fig.16 DC voltage u_c₁

Fig.17 DC voltage u_c₂

Fig.18 DC voltage u_c₃

Fig.19 DC voltage u_c₄

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