442 / 2022-03-15 22:20:43

Calculation Method of DC Metro Stray Current Considering Metro Lines Network Structures

Stray current,DC Metro,Calculation Method,Network Structures

With the development of the DC metro system and network, the superposition of dc stray current increases. The large stray current threatens the burred metals and grounding transformers. Therefore, It is necessary to calculate the stray current of networked metro lines. Considering the grounding system structure of each metro line and over-voltage potential device (OVPD)at each station, the single metro line stray current model is established. Considering the connection of the grounding system at the transfer station, the metro network model is modelled. The results show that, when OVPD turn on, the stray current leaks into grounding systems from one metro line to another metro line.  The stray current can transfer through the grounding systems. The stray current transfers range increases Under the metro network condition.