Paper Title
Analysis and Design of C-Type Filter for Harmonic Mitigation in AC Railway Power Feeding System

Abstract
Harmonics are the secondary effects of non-linear loads and power conversion equipment. Harmonics have a significant impact on the decline of power quality, which is referred to as harmonic distortion. To reduce the impact of harmonics, individuals may choose to install either passive or active filters. Passive filters are extensively used to mitigate harmonics. In this report, the design and performance of a C-type passive harmonic filter are analyzed to simulate the harmonic reduction performance at a traction substation with a multi-train simulation example of an electric train, the Airport Rail Link (ARL) city line. The simulations showed that installing a filter at the ARL electrical traction station got rid of the harmonic sequences with the most harmonics, specifically the 3rd and 49th harmonic sequences. The C-type harmonic filter reduced total harmonic distortion of voltage (THDV) by 80.561% and 97.222%, and total harmonic distortion of current (THDI) at the total harmonic sequence was reduced by 80.746% and 90.705% at the traction station compared to the harmonic amount before the filter was installed. In addition, IEEE 519-2022 standards are used to compare the amount of harmonics that occur. Keywords - C-type harmonic filter, Passive Filters, Harmonic, Harmonic mitigation, Total Harmonic Distortion, Railway system.