• Aviral kumar
• Dr. A K Kori

Now a days Applications are mostly based on power electronics loads like printers, computers and other switching based devices which is mostly fed by three phase four wire system, this increases harmonics in ac mains current. This paper purposes harmonic current reduction in three phase four wire system using fuzzy logic controller with PLL based shunt active filter. The purposed paper comprises of fuzzy logic controller technique for dc link voltage regulation, hysteresis current controller scheme for three phase four leg voltage source inverter. As in PI controller the proportional and integral gains are needed fine tuning for each load setting here fuzzy logic controller gives reliable operation. For the proposed auto tuned shunt active power filter, the THD well within IEEE-519 standards. THD calculation of current based on FFT analysis. The proposed model is modelled in MATLAB/SIMULINK and successfully reduces harmonic current.

Fuzzy logic controller, THD, PLL, Hysteresis current controller shunt active filter, FFT analysis, MATLAB/SIMULINK

"Power Quality improvement in Three Phase Four Wire System using Fuzzy Logic Controller with PLL based Shunt Active Power Filter", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 7, page no.531-538, July-2018, Available :http://www.jetir.org/papers/JETIR1807227.pdf

"Power Quality improvement in Three Phase Four Wire System using Fuzzy Logic Controller with PLL based Shunt Active Power Filter", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 7, page no. pp531-538, July-2018, Available at : http://www.jetir.org/papers/JETIR1807227.pdf