Design and Calculation of Single Tuned Passive Filter for Harmonic Mitigation in a 1250 kVA Distribution Transformer at PT. INKA (Persero) Madiun
DOI:
https://doi.org/10.30595/jrre.v7i1.25333Keywords:
Passive Filter, Harmonics, Single-Tuned, Power QualityAbstract
In an effort to enhance quality and customer satisfaction, PT. INKA continues to innovate and improve its products, evidenced by increasingly advanced railway facilities. This study provides reference data for PT. INKA (Industri Kereta Api) Madiun in designing a filter to enhance power quality in transformers, prevent equipment damage caused by harmonics, and ensure the reliability of the protection system. The research, conducted at PT. INKA (Persero) Madiun, specifically focused on Trafo Station B, using a quantitative method with a descriptive approach to systematically and accurately describe variables. Measurements before filter installation showed current THD values of 28,50%, 4,0%, and 2,4% in phases R, S, and T, and voltage THD values of 1,51%, 1,55%, and 1,57%. After the filter was installed, current THD decreased to 11,07%, 1,37%, and 1,09%, and voltage THD to 0,87%, 0,85%, and 0,81%. Based on simulations using ETAP software, the passive single-tuned filter design successfully reduced harmonic distortion with specifications of a 2285 µF capacitor, a 0,00308732 H inductor, and a 0,011-ohm resistor. The findings demonstrate the filter's effectiveness in improving power quality and ensuring system reliability.
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