A Study on the EMI between ATS and ATC/ATO System
ATS(Automatic Train Stop) system makes train stop when it runs over the speed limit and ensure the safe operation of train. Seoul Metro line 2 in Korea, which started its passenger service in 1982, has adopted ATS system for its signaling system. The ATS system has only a train stop function at the time of emergency, and Seoul Metro is planning to replaced them with ATC(Automatic Train Control)/ATO(Automatic Train Operation) system which can provide the dedicated speed control for headway reduction and unmanned operation of train. Until all the ATS system is replaced with the new ATC system, both systems are to operate simultaneously at the same metro line. In this situation, ATS system sometimes reveals improper operation: train stops suddenly without any obstacles in front of it. These improper stop causes interruption of passenger service. The research makes it clear that these interruptions are caused by EMI phenomena between ATS on-board device and track circuit of ATC system: Signal current flowing in the track circuit is turn out to be a EMI source that prevent the ATS on-board device from normal operation. This is investigated by frequency spectrum analysis of signaling currents and frequency response of ATS on-board device analyzed by FFT(Fast Fourier Transform). The analysis shows that ATS on-board device has a frequency response covering the frequency of signaling current flowing in the track circuit. Although the two systems have different frequency-ranges (ATS system has frequency range between 78~130kHz and ATC system has frequency range between 9.5~16.5kHz), EMI phenomena appears between the both systems. The countermeasures to prevent these EMI phenomena are suggested in two ways. One is elimination of EMI source: blocking the signaling current of track circuit when ATSmounted train pass. Dedicated device for automatic blocking of signaling current is developed and installed at the site. The other is enforcement of EMS(Electromagnetic Susceptibility) : setting a high-pass filter to the circuit of ATS on-board device. These measures make a success in preventing the EMI problem of Seoul Metro line 2.
Automatic Train Stop Automatic Train Stop Electro Magnetic Interference Electro Magnetic Susceptibility
Sunho Yoon Younghwan Ko Kyuhyoung Choi
Department of Railroad Electrical & Signaling Engineering, Seoul National University of Technology, Department of Railroad Electrical & Signaling Engineering, Seoul National University of Technology,
国际会议
The International Conference on Electrical Engineering 2009(2009 电机工程国际会议)
沈阳
英文
1-5
2009-07-05（万方平台首次上网日期，不代表论文的发表时间）