Abstract
In high-speed and heavy-load operation environment, the insulation joints of the station track circuit are damaged in many stations, which caused the carrier information of the adjacent sections to interfere with each other, endangered the safety of the train and reduced the reliability of the track circuit. In order to solve the incorrect code problem caused by the insulation joint breakage, we analysed the insulation damage situation for the station track circuit and the structural principle of BES choke transformer. Then the different structures of the insulation damage protection circuit are given and the relevant parameters are obtained, and verifying the anti-interference ability of the new BES choke transformer. Finally, a complete four-terminal network model of the new BES choke transformer is established. And its four-terminal network parameters are calculated by matlab simulation, which provides the theoretical basis for establishing the track circuit complete system.
Highlights
The ZPW-2000 track circuit is an important component of the train control system, which has the ability to transmit train information, train positioning and other main functions[1]
Based on the improvement of the traditional choke transformer, this paper proposes a kind of rail-side protection scheme that can effectively prevent the carrier frequency mutual interference of the adjacent track circuit section caused by the mechanical insulation damage in station
The choke transformer is one of the important equipment of the station track circuit, we proposed to parallel the insulation damage protection circuit on the BES choke transformer secondary side to solve the adjacent section carrier frequency mutual interference
Summary
The ZPW-2000 track circuit is an important component of the train control system, which has the ability to transmit train information, train positioning and other main functions[1]. The insulated track circuit must be adopted, using the mechanical insulation joint to divide the adjacent track circuit section. The choke transformer is used to conduct the traction current and ensure the reliable transmission of frequency-shift signal in the mechanical insulation joint. In view of the burning damage of mechanical insulation joint in high-speed railway passenger stations, the domestic scholars mainly focuses on that how to alleviate the burning damage of mechanical insulation joint[6], and did not give specific solutions to the problem of the carrier frequency mutual interference of the adjacent track circuit section in station. Based on the improvement of the traditional choke transformer, this paper proposes a kind of rail-side protection scheme that can effectively prevent the carrier frequency mutual interference of the adjacent track circuit section caused by the mechanical insulation damage in station
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