This paper presents a novel method to calculate the reference source current and the referencecompensating current for shunt active power filters (SAPFs). This method first calculates theamplitude and phase of the fundamental load current from a recursive algebraic approach blockbefore calculating the displacement power factor. Next, the amplitude of the reference mains currentis computed with ...

In this paper, the digital controller design for compensating the dc-dc buck converter output voltage has been analyzed in the digital domain. The main idea of this paper is patterning the samples of high order ideal controller and using integral square error in determining digital PID coefficients. This approach provides higher precision of digital controller design and eliminates the need for...

This paper presents a new control method for simultaneous compensation of instantaneous reactive power and current harmonics by parallel active filters (PAFs). Reference compensating currents of PAF are calculated using the subtraction of instantaneous power from its average value. In this way, it is possible omitting high/low pass filter(s) from the control circuit of PAF, which usually result...

The main aim of this project is ,this topology enables UPQC to have a reduced dc-link voltage without compromising its compensation capability. Three-phase, four-wire unified Power Quality (UPQC) to improve power quality. The UPQC is realized by the integration of series and shunt active power filters (APF) sharing a common dc bus capacitor. The realization of shunt APF is carried out using a t...

Recently, renewable wind energy is enjoying a rapid growth globally to become an important green electricity source to replace polluting and exhausting fossil fuel. The stability of fixed-speed induction generator (FSIG)-based wind turbines can be improved by a StatCom, which is well known and documented in the literature for balanced grid voltage dips and comparing with the variable speed perm...

A new topology is proposed to regulate voltage sags/swells in distribution network this paper. Voltage sags and swells are a serious power quality problem faced by the industry. The major traditional restorer, based on energy storage device, not adequate for compensating deep long-duration sags/swells. To solve problem, novel bipolar direct AC/AC type restorer (AC/AC-VR) that both with regulati...

<span lang="EN-US">This paper presents a new control strategy based on the combination between resonant controller and disturbance-observer (RSCDO) for stand-alone four-leg Voltage Source Inverter (VSI). The aim of is to regulate inverter output voltage, reducing as much possible voltage Total Harmonic Distortion (THDv) in every load condition. allows adjust fundamental harmonic, whereas ...