| Title |
A Study on the Voltage Unbalance and THD Analysis Method using Actual Measured Signals in the AC Railway System |
| Authors |
민명환(Myung-Hwan Min) ; 홍재영(Yu-Ran Go) ; 고유란(Tea-Pung An) ; 안태풍(Tea-Hoon Lee) ; 이태훈() |
| DOI |
https://doi.org/10.5370/KIEE.2021.70.12.2046 |
| Keywords |
AC Railway system; THD; Voltage unbalance; Power quality; Harmonics |
| Abstract |
In this paper, the existing analysis method for the total harmonic distortion (THD) and the voltage unbalance among power quality is presented. The existing method calculates based on the measured voltage value, but it is difficult to derive only the power quality value of railway operation since the voltage is affected by the commonly connected system. This study proposes a method of calculating the measured current value, power value, and system short-circuit capacity value. In order to verify the validity of the proposed method, the basic method and the proposed method were compared and analyzed based on the actual measured signals in the AC railway substation. |