Current distortion degrades power quality and affects system performance, especially for sensitive loads that require pure sinusoidal waves. Owing to its excellent dynamic response, a well-designed active filter (APF) can achieve total harmonic (THD) within the acceptable limits defined by IEEE 3002 standards through compensating distortions. The APF consists of two main modules: reference sign...

In this paper,Hybrid power filer (HPF) six switch two leg inverter for improved harmonic campanstion. The praposed scheme is required to an other active filter with passive filter un luckily most of the HPF are have common drawback a most number of passive components or transformer. The HPF have small rated inverter and LC filter of this proposed method. HPF are connected to the grid with out a...

high power and medium voltage (MV) applications need Controlled rectifiers such as 12-pulse converters, because of the high reliability, low complexity, robustness and low power losses. But having the drawback of harmonics generation causes power quality problem. Power quality can be improved with passive filters but having disadvantages such as dependency on the source impedances, parallel and...

Faced with serious harmonic pollution, a global fast terminal sliding mode control (GFTSMC) based on novel recurrent fuzzy neural network (NRFNN) strategy for an active power filter (APF) uncertainty is proposed in this article, which aimed at improving the quality and realizing suppression. First, GFTSMC adopted due to its advantages finite-time convergence faster rate of tracking error system...

This paper presents unified power quality conditioner (UPQC) system based on three-level neutral point clamped (NPC) using Fuzzy and ANN controllers. The proposed UPQC is able to mitigate source current harmonics compensate all voltage disturbances. It designed by the integration of series shunt active filters (AFs) sharing a common DC bus capacitor. maintained constant proportional integral co...

Renewable energy resources (RES) are being increasingly connected in distribution systems utilizing power electronic converters. This paper presents a novel control strategy for achieving maximum benefits from these grid-interfacing inverters when installed in 3-phase 4-wire distribution systems. The inverter is controlled to perform as a multi-function device by incorporating active power filt...

The harmonics due to using of nonlinear industry loads based on power electronic elements have resulted in enormous economic loss. Therefore, the power utilities always need new technologies to deal with the harmonic problems. Active power filter (APF) has been considered as an attractive solution due to its effective performance for harmonic mitigation. The compensation currents injected by th...

this paper presents an innovative active power filter design method to simultaneously compensate the current harmonics and reactive power of a nonlinear load. the power filter integrates a passive power filter which is a rl low-pass filter placed in series with the load, and an active power filter which comprises an rl in series with an igbt based voltage source converter. the filter is assumed...

Single phase unified power quality conditioner (UPQC) consists of series and shunt active power filter (APF) with common dccapacitor. Series converter acts as voltage source converter and shunt converter acts as current source converter. Use of non-linear loads results in voltage and current harmonics. These harmonics can be eliminated by using single phase UPQC. So that, which also improves th...

In order to detect grid harmonic and reactive current precisely and real time, this paper arrived at a method of harmonic and reactive current real-time detection applied to active power filter based on the three-phase circuit instantaneous reactive power theory. With Matlab simulation software, researches on simulation of harmonic detection means are carried out, and an analysis of the simulat...