The virtual-return-based DC traction power supply system (VRTPS) has been developed to address the stray current and rail potential issues of urban rail transit. VRTPS establishes the virtual return node (VRN) on the running rail, forming the zero-resistance virtual return path for train current from VRN to the traction substation, thereby significantly reducing both stray current and rail potential of system. However, considering that the conventional control strategy may show the limited mitigation performance between the train and VRN, this paper proposes an improved control strategy for VRTPS to further reduce the stray current and rail potential of system. Based on the configuration and principle of VRTPS and its power electronic devices, the improved control strategy with better mitigation performance is analyzed in detail. Then, the comprehensive comparisons between the improved and conventional control strategies on both stray current and rail potential distribution are discussed through the equivalent model. Finally, the simulation results are constructed to validate the effectiveness of proposed control strategy.


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    Title :

    An Improved Control Strategy for Virtual-Return-based DC Traction Power Supply System to Further Reduce the Stray Current and Rail Potential


    Contributors:


    Publication date :

    2025-05-16


    Size :

    1882515 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English




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