Abstract
전기철도는 전차선을 통해 차량을 구동할 수 있는 전력을 공급하며, 공급된 전류는 선로 및 접지망을 통해 변전소로 귀환한다. 귀선전류는 신호, 전력, 전차선 및 궤도시스템과 연관되며, 선로변 직원의 안전과 전철화에 따른 철도관련 전기시스템의 보호를 위해 취급되어야 할 가장 중요한 요소 중 하나이다. 따라서 귀선전류의 불평형 및 과전류 상태에 의한 시스템유도장해, 고장을 막기 위해서는 귀선전류의 정확한 분석이 필요하다. 본 논문은 귀선전류의 불평형 및 과전류 상태에 의한 시스템 유도장해, 고장을 예방하기 위해 실제 현장에서 측정 및 분석방법을 제시하였으며 또한 시험기준에 의한 안전성을 평가하였다. 이러한 결과는 향후 이와 관련된 분야에 크게 기여할 것으로 기대된다. Electrical Railroads provide electric power, which can operate vehicles, via feeder wires. And the supplied current returns to the transformer substation through lines and ground net. The return current, related to signal, power and power line, and track circuit systems, is one of the most important component in the electric railway. Therefore, to prevent system faults and breakdown according to unbalance and overcurrent of the return current, various and detailed analyses for the return current are needed. In the paper, we present measurement and analysis manners in real environment and evaluate its safety. For analysis, we utilize the measured values of return currents measured in track circuits in electric railway. we expect that this research plays a key role to the related fields.
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