This paper deals with a three-phase unified power quality conditioner (UPQC), with a combination of shunt active power filter and series active power filter is used to eliminate supply current harmonics, compensate reactive power, voltage sag and voltage swell compensation on distribution network. The performance of the active power filter mainly depends on control strategy used to generate ref...

Nowadays, active power filter (APF) is the most popular device for harmonic compensation. This paper presents soft computing techniques compensation of currents harmonics using a shunt (SAPF). The method includes 3-phase supply system with current-controlled voltage source converter (CC-VSC) having an input coupling inductor and output tank capacitor self-supported DC bus. performance can be en...

This paper shows the method of improving the power quality using shunt active power filter. The proposedtopic comprises of PI controller, filter hysteresis current control loop, dc link capacitor. The switching signal generation for filter is fromhysteresis current controller techniques. With the all these element shunt active power filter reduce the total harmonic distortion. Thispaper represe...

This paper presents a fuzzy logic, PI, average current controlled shunt active power filter used to compensate for harmonic distortion in three-phase four-wire systems. The shunt active filter employs a simple method for the calculation of the reference compensation current based on Fast Fourier Transform. The presented Shunt Active Power filter is able to operate in balanced, unbalanced and Va...

The shunt active power filter (SAPF) system oscillation is a massive threat to the security and stability of grid. This study classifies SAPF into two categories according difference in mechanisms. one category caused by resonant characteristics switching noise called external loop amplification. other induced presence capacitor load current for self-excited oscillation. Unlike previous studies...

The shunt active power filter (SAPF) is a widely used tool for compensation of disturbances in three-phase electric systems. A high number control methods have been successfully developed, including strategies based on artificial neural networks. However, the typical feedforward network, multilayer perceptron, which has provided effective solutions to many nonlinear problems, not yet employed w...

This paper introduces a control strategy for the assessment of SAPF (shunt active power filters) role in the electrical power networks. The proposed control scheme is based on the Lyapunov control theory and defines a stable operating region for the interfaced converter during the integration time with the utility grid. The compensation of instantaneous variations of reference current component...

A single-phase shunt active power filter is used mainly for the elimination of harmonics in single-phase AC networks. In this paper a single-phase shunt active power filter based on, an indirect control technique is designed and simulated. This control technique is achieved by phase shifting the input signal(voltage/current) by π/2.The overall action of the shunt active power filter to eliminat...

The problem of controlling three-phase, four-leg shunt active power filters (SAPF) is addressed in presence of nonlinear and/or unbalanced loads. A new control model for four-leg SAPF, taking into account for the electrical grid line impedance, is developed. The control objective is threefold: (i) compensating for the current harmonics and the reactive power absorbed by the nonlinear load; (ii)...