전기철도 리액턴스 방식의 고장점 표정장치 신뢰성 향상에 관한 연구

Abstract

The world considers electric railways as a way to overcome environmental pollution problems and road traffic limitations in road traffic. Korea has implemented a system to invest 2% of GDP in low carbon green growth every year for the adoption of the carbon trading system specified in the Kyoto Protocol in 2010. If a fault such as a short circuit or a ground fault occurs on an electric railway, the power supply can not be completed until the completion of the recovery, and it is inconvenient for customers because it is difficult to use the train. In addition, it is essential to maintain and maintain stability and reliability to minimize failure times, because of the wide distribution of electric railways. In the high-speed railway feed system, a new reactance method is developed and utilized so that nonlinear reactance can be inputted. The reactance value of the tram line is measured and input separately. If a fault occurs, the reactance value is calculated only up to the fault point. The reactance value is firstly compared with the input reactance value, and the distance is converted. In this paper, to improve the reliability of the fault locator using the reactance method, a simulation using the fault locator and the reactance method based on the ground fault was performed. The result proves that even if the reactance changes, the current ratio of the contact protection wire enables a high strength representation. It is considered that the reliability of the electric railway can be improved through the reactance type fault locator.