A fuzzy multiple hidden layer neural sliding mode control with feedback loop (FMHLNSMCMFL) is proposed for a single-phase active power filter (APF), where controller designed to make the current tracking error converge zero and new network loops introduced approximate unknown dynamics. At same time, can eliminate chattering, improve accuracy reduce distortion rate of APF. Moreover, double recur...

Abstract: In this paper, a new topology is developed for a three-phase four-wire (3P4W) distribution system utilizing a zig-zag transformer along with three-phase threewire (3P3W) Unified Power Quality Conditioner (UPQC).In this proposed topology the neutral point of the star connected transformer, used for the connection of series active power filter (APF) of 3P3W UPQC, is utilized as a fourth...

This paper presents novel Unified Power Quality Conditioner (UPQC) system based on seven-level Neutral Point Clamped (NPC) inverter using combined PD-SPWM and fuzzy control scheme. The proposed UPQC is adopted to mitigate source current harmonics compensate all voltage disturbances simultaneously. It designed by the combination of series shunt Active Filters (AFs) connected a common DC link cap...

There have been concerns raised on load non-linearity as more and types are being introduced into the radar power supply system. The non-linear produces harmonic current while it seriously threatens normal safe operation environment of other system equipment. It can be difficult to design shunt active filter (APF) eliminate effect achieving stability reliability. This paper designs a hybrid opt...

-A three-phase hybrid series power filter is constituted by a series active filter and a passive filter connected in parallel with the load. The control strategy is based on the “dual formulation of the electric power vectorial theory”. The proposed algorithm eliminates the current harmonics of supply. It also improves the power factor and harmonic compensation features of the associated passiv...

In the current power system, conversion between dc and ac is widely existing dc-side harmonic problem prominent. To suppress second-harmonic at side of a single-stage single-phase inverter, hybrid active filter (DC-HAPF) structure presented, which composes bidirectional dc-dc circuit-based (APF) CL passive filter. this article, used to mitigate high-frequency harmonics APF applied compensate lo...

Use of nonlinear loads at high voltages has increased tremendously in industry. These non-linear loads distort power quality by generating harmonics. Conventional active filters have limitations in high power high voltage systems. Use of multilevel inverter in active filters effectively reduces harmonics in high voltage systems eliminating need of high cost and bulky transformer. This paper pre...

This paper describes n digital control algorithm for a three-phase shunt active power filter (APF) using switching–sliding discrete Fourier transform (SSDFT). Traditionally, APF algorithms use first harmonic detector circuits, which can be implemented the SDFT algorithm. The classical is characterized by long-term stability issues, resulting from numerical errors. Many complex modifications to ...

this paper presents a novel control approach used in shunt active power filter based on variable structure control combined with random pwm technique (rvsc) that provides robust, fast, and more favorable performance for active power filter. this control strategy is compared with two other strategies to show the effectiveness of the introduced methods; pulse width modulated proportional-integral...