Photovoltaic (PV) system is one of the most important and fastest developing renewable energy sources in the globe recently. Since most of the grids contain a power converter system based on power electronic components and several nonlinear loads, which deteriorate power quality. In this paper, the aim is to propose a solution to solve this problem using a shunt active filter SAPF based on efficiency method called Synchronous Detection Method SDM, in the identification of the harmonic currents. The SAPF controller consists of an inverter which works as a multi-functional device, it adopted to interface PV system with the electrical grid and at the same time, to eliminate harmonics generated by nonlinear loads with reactive power compensation. To extract the maximum power in photovoltaic system a fuzzy logic control is proposed to solve a fast irradiation change problem which is compared to the conventional P&O algorithm. The simulation results using Matlab /Simulink show that the fuzzy logic control MPPT gives the best performance with small oscillation in output power, at the same time. The proposed control strategy of SAPF performs the power quality in grid-connected photovoltaic system with smaller total harmonic distortion, grid synchronization and unity power factor.

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Active Power Filter for Power Quality in Grid
Connected PV-System using an Improved Fuzzy
Logic Control MPPT
ABSTRACT:
Photovoltaic (PV) system is one of the most important and fastest developing renewable energy
sources in the globe recently. Since most of the grids contain a power converter system based on
power electronic components and several nonlinear loads, which deteriorate power quality. In
this paper, the aim is to propose a solution to solve this problem using a shunt active filter SAPF
based on efficiency method called Synchronous Detection Method SDM, in the identification of
the harmonic currents. The SAPF controller consists of an inverter which works as a multi-
functional device, it adopted to interface PV system with the electrical grid and at the same time,
to eliminate harmonics generated by nonlinear loads with reactive power compensation. To
extract the maximum power in photovoltaic system a fuzzy logic control is proposed to solve a
fast irradiation change problem which is compared to the conventional P&O algorithm. The
simulation results using Matlab /Simulink show that the fuzzy logic control MPPT gives the best
performance with small oscillation in output power, at the same time. The proposed control
strategy of SAPF performs the power quality in grid-connected photovoltaic system with smaller
total harmonic distortion, grid synchronization and unity power factor.
KEYWORDS:
1. Shunt Active Power Filter
2. Grid connected PV system
3. MPPT (P&O)
4. Fuzzy Logic controller

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5. Power quality enhancement
SOFTWARE: MATLAB/SIMULINK
CONCLUSION:
This paper presents the simulation performance of a three-phase inverter-based multifunction PV
power system with shunt active filtering capability. The simulation results show that the
proposed multifunctional grid-connected PV power system is efficient for maximum PV power
injection to the grid while filtering the current harmonics and compensating reactive power
caused by nonlinear loads. Furthermore, a fuzzy logic controller based on P&O MPPT is applied
in the PV system and compared with the conventional P&O algorithm. Under fast irradiation this
FLC technique represents a good performance and increases the system efficiency. The
simulation results show that the power control with multifunctional inverter is mostly achieved
because in the daytime with intensive irradiation, the solar PV power system provides active
power together with active power filter functionality. At night and/or during poor irradiation
times, the active power required by the loads is supplied from the utility and the power quality is
improving by SAPF.
REFERENCES:
[1] B. Boukezata, J. P. Gaubert, A. Chaoui and M. Hachemi. “Générateur photovoltaique avec
une commande directe de puissance connecté et avec adjonction de services au réseau de
distribution,” Symposium de Genie Electrique EE-EPF. 2016 Grenoble
[2] A .Kalair ,N.Abas, A.R.Kalair, Z.Saleem,N.Khan. “Review of harmonic analysis, modeling
and mitigation techniques”, 78 pp; 1152-1187 . 2017.
[3] M.TALI, A.Obbadi, A.Elfajri, Y.Errami. “Passive Filter for harmonics mitigation in
standalone pv system for nonlinear load”, IRSEC14 ,978- 1-4799-7335-4, october 2014.
[4] B.Singh and K.Al haddad, “A review of active filter for power quality improvement”, IEEE.
Vol: 46 , Issue: 5 , pp: 960 – 971.Oct1999.

3. ELECTRICAL PROJECTS USING MATLAB/SIMULINK
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[5] B.Boukezata, A.Chaoui, “Power Quality Improvement by an Active Power Filter in Grid-
connected Photovoltaic systems with Optimized Direct Power Control Strategy”, Electric Power
Components and Systems , vol:44, Issue :18 , pp:2036-2047, Oct 2016.