this paper presents a new control method for a three-phase four-wire unified power quality conditioner (upqc) to deal with the problems of power quality under distortional and unbalanced load conditions. the proposed control approach is the combination of instantaneous power theory and synchronous reference frame (srf) theory which is optimized by using a self-tuning filter (stf) and without us...

Mitigating power quality issues in distribution systems is of utmost importance to both electricity consumers and suppliers as it improves the system’s efficiency, reduces costs, maintains continuous supply, diminishes requirement for frequent maintenance. Custom devices were introduced eliminate like voltage sags, swells, transients, imbalances, current harmonics arising systems. Unified condi...

Abstract: The integration of renewable power sources with power grids presents many challenges, such as synchronization with the grid, power quality problems and so on. The shunt active power filter (SAPF) can be a solution to address the issue while suppressing the grid-end current harmonics and distortions. Nonetheless, available SAPFs work somewhat unpredictably in practice. This is attribut...

<span lang="EN-US">The intensive use of non-linear loads is further contributing in the increase power quality problems. They cause voltage distortions and current harmonics an electrical distribution network. To minimize these problems, unified conditioner (UPQC) used. The intermediate circuit this filter can deviate from its source during a transient event harmonic disturbance (voltage ...

This paper presents a novel control strategy of a threephase four-wire Unified Power Quality (UPQC) for an improvement in power quality. The UPQC is realized by integration of series and shunt active power filters (APFs) sharing a common dc bus capacitor. The shunt APF is realized using a thee-phase, four leg voltage source inverter (VSI) and the series APF is realized using a three-phase, thre...

An intelligent control strategy is proposed in this paper which suggests the Optimum Power Quality Enhancement (OPQE) of grid-connected hybrid power systems with solar photovoltaic, wind turbines, and battery storage. Unified Conditioner Active Reactive (UPQC-PQ) designed Atom Search Optimization (ASO) based Fractional-order Proportional Integral Derivative (FOPID) controller Hybrid Renewable E...

In this paper a compensation strategy based on a particular CUPS device, the Unified Power Quality Compensator (UPQC) has been proposed. A customized internal control scheme of the UPQC device was developed to regulate the voltage in the WF terminals, and to mitigate voltage fluctuations at grid side. The voltage regulation at WF terminal is conducted using the UPQC series converter, by voltage...

The usage of electric vehicles (EV) increased in recent years as the design and performances are nearly similar to petrol vehicles. main source energy for EV is taken from grid charging. So, penetration EVs alternating current (AC) creates more power quality issues like voltage sag, swell harmonics current. This can also be produced renewable resources photovoltaic (PV) generation. PV used dire...

The term ‘power quality’ [1-2] refers to the purity of the voltage and current wave-form, and a power quality disturbance is a deviation from the pure sinusoidal form. Harmonics superimposed on the fundamental are one cause of such deviations. Power quality problems [1-2] like voltage harmonics, voltage flickers, voltage sags and voltage swells, current harmonics, current unbalance, reactive cu...