광역철도차량의 귀선전류에 의한 궤도회로 영향 분석

초록

The use of electricity as a major power source of railway transportation provides customers with convenient services and high-speed and eco-friendly transportation. The current supplied to the train passes through the power conversion step and propulsion units and returns to the substation through rails and impedance bonds. Such a return current can contain harmonics, which can be significantly amplified and disrupt communication lines and railway signal systems. Therefore, in the case of a new line or an improved line replacing an old signal system, it is necessary to test whether the return current and the return current harmonics generated by the propulsion of the train affect the track circuit, which is one of the railway signal systems. The track circuit performs an important safety function in monitoring and managing trains in railway transportation. This paper presents a measurement method for the return current and the return current harmonics for mini impedance bonds on metropolitan railway lines with the DC power supply. While driving at the highest allowable speed, the measurement results for the maximum return current, the unbalance rate, and the return current harmonics are presented.

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