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There are two common methods applied in the traction line fault location, the travelling wave method and the impedance method. Each method has advantages and disadvantages. It is difficult to achieve optimized goal with only one method. Therefore, this paper combines the two algorithms to improve the accuracy of fault location. MATLAB/Simulink software was used to test and validate the proposed fault...
Due to the increased strain of the urban ground traffic, the DC railway transit system has been developed rapidly to solve the traffic problems. Therefore, it is important to ensure the security and reliability of the DC traction power supply system. Low-resistance grounding fault has an extremely deadly effect against the safe operation of urban rail transit system. Furthermore, it is difficult to...
Locating high-resistance grounding faults poses a tough and challenging problem for the safety of DC railway systems. High-resistance grounding fault current isn't sufficient to trigger switches, which may expand the accident or turn into potential hazards. In order to overcome the limits of the existing methods (such as signal injecting method, resistance method and so), developing a novel fault...
This paper presents a new current selective trip protection algorithm which is based on the current changes on the same end of line. The new algorithm can reduce the communication of transmission line pressure and reduce the length of the signal delay to the protection of the impact. With the introduction of the new algorithm, the typical AC power ring line for DC railway system based on PSCAD is...
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