Perbandingan Filter Pasif LC dan RC untuk Reduksi Total Harmonic Distortion pada Keluaran Static inverter Satu Fasa Beban Auxiliary Kereta
Year: 2026
Type: article
Abstract: Nonlinear auxiliary loads of railway coaches supplied by a single-phase static inverter generate harmonics that degrade power quality. This study aims to design passive filters that reduce the current Total Harmonic Distortion (THD) at the output of a single-phase static inverter so as to comply with the IEEE 519-2014 limits, with all design and testing carried out through MATLAB/Simulink simulation. Two three-stage low-pass ladder passive-filter configurations are compared, namely LC and RC circuits, with component values computed from the harmonic data of the inverter output under nonlinear loading. A 2.88 µF capacitor was determined from power-factor correction, while a 0.59 H inductor was selected so that the cut-off frequency of each LC stage lies at about 122 Hz, between the fundamental (60 Hz) and the third harmonic (180 Hz); the RC configuration uses resistors of 3.1 Ω, 1.8 Ω, and 1.3 Ω. Simulation results show that the average current THD before filtering was 38.22%, dropping to 2.58% with the LC filter (an average reduction of 93.40%), whereas the RC filter only reduced it to 23.36% (an average reduction of 43.55%). The LC passive filter proved markedly more effective at suppressing harmonics and satisfied the IEEE 519-2014 limits.
Language: English
Topic: Power Quality and Harmonics
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W7223176803