Study and analysis of 3-phase 3-wire shunt active filter using sinusoidal current control strategy

Abstract

Existence of harmonics in power system makes it unavoidable to custom power filters. Shunt active power filters (SAPF) are broadly implemented in power systems for mitigating the harmonic current component as well as to recompense imaginary or reactive power owing to their exact and reckless operation. The objective of this paper is to improve power quality through mitigating harmonics. This paper focuses on sinusoidal current based controller used in a shunt active power filter system (SAPF). Sinusoidal current control strategy is used to extract alternating (sinusoid) current commencing the source. The sinusoidal Currents, in addition with a stout synchronizing circuit (PLL circuit), custom a brief controller meant for shunt active filter. Power filter offers current compensation in such a manner that the shunt current drained from the system is sinusoidal and stable, analogous in the direction of the positive-sequence constituent of load current. SAPF is precise by a sinusoidal current control based controller in order to perform like a harmonic isolator among supply and load. Action of the shunt active filter under passive load conditions using non-linear load, the performance of the sinusoidal current control technique is evaluated using MATLAB R2015a. Total harmonic distortion (THD) of voltage as well as of current determines the practical feasibility of controller designed for shunt active filter to deliver a harmonic separation of passive loads.