Open AccessDesign and Implementation of Hybrid Filter for Harmonic Reduction and Damped Resonances in Non-Linear Loads
Author(s) -
Y C Arif,
L P S Raharja,
S Auladah
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1096/1/012072
Subject(s) - power factor , harmonics , electronic filter , control theory (sociology) , capacitor , active filter , harmonic , lc circuit , mechanical filter , filter (signal processing) , ac power , filter design , prototype filter , voltage , acoustics , engineering , computer science , physics , electrical engineering , control (management) , artificial intelligence
The use of Power Factor Correction (PFC) is generally used to increase the power factor in a system plan. However, the system will be dangerous if there are non-linear loads on the system that causes resonance risk. The impedance of the capacitor bank for PFC can interact with the non-linear loads and the impedance of the up-transformer which causes series and/or parallel resonances. Resonance causes surges in currents and voltages at harmonic frequencies. This problem can be solved by adding a detuned reactor filter in PFC. However, the implementation of detuned LC passive filters can’t reduce all harmonic components. This paper presents a hybrid filter consisting of a detuned LC passive filter and an active filter to reduce harmonics, avoid the system from resonance risk, and to improve the power factor. This system using 5Kvar of capacitor bank and a 14% detuned reactor filter combined with an active filter. The results of power quality increasing the power factor from 0.6 to 0.88, THDi is reduced from 49.5% to 18% after using a hybrid filter.