Open AccessAnalysis of static VAr compensators installed in different positions in electric railways
Author(s) -
Wang Hui,
Liu Ying,
Yan Kun,
Fu Yongsheng,
Zhang Chenghui
Publication year - 2015
Publication title -
iet electrical systems in transportation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.588
H-Index - 26
eISSN - 2042-9746
pISSN - 2042-9738
DOI - 10.1049/iet-est.2014.0046
Subject(s) - traction substation , traction (geology) , engineering , voltage , harmonics , automotive engineering , power quality , compensation (psychology) , power grid , waveform , electrical engineering , power (physics) , mechanical engineering , psychology , physics , quantum mechanics , psychoanalysis , transformer
With the power quality problems of electric railways becoming more and more serious, static VAr compensators (SVCs) have been widely used for power quality management. SVCs can be installed in the low‐voltage side of traction substations, the high‐voltage side of traction substations or the electric railway power supply side of substations. Different installation positions result in different compensation effects. In this study, characteristics of harmonic and negative sequence currents in the low‐voltage and high‐voltage sides of traction substations are analysed theoretically. Four schemes with SVCs in different installation positions are proposed. Then based on the measured datum and waveforms, simulation of each scheme is implemented, respectively, using PSCAD/EMTDC software. By comparing the compensation effects of the four schemes, the best SVC installation scheme in the low‐voltage side of the traction substation is recommended for the measured traction substation. With SVC, the electric railway will have a less negative effect on the power grid. This study can also be applied to other SVC applications with non‐linear loads, such as arc furnaces, rolling mills or electrochemical devices.