Study on Variable Frequency Power Supply Cable and Leakage Current Characteristics of High-Speed Maglev Train

The high-speed maglev train uses long distance variable frequency power supply in operation, so the distance between the traction substation and the stator section of the train is usually thousands of meters, which causes a large leakage current in the power supply cable. Aiming at the leakage current of power supply cables, this paper builds a cable model in PSCAD, and applies voltages of different amplitudes and frequencies and different length parameters to power supply cables according to the actual working environment and structural parameters, so as to obtain the relationship between leakage current and these parameters. According to the actual structure of XLPE power supply cable used in the power supply system of high-speed maglev train, a power supply cable model considering ground access parameters is proposed on the basis of the traditional power supply cable model. The proposed model is simulated in Simulink and compared with the simulation results of PSCAD to verify the rationality of the model. It provides a theoretical basis for analyzing the leakage current of variable frequency power supply of high-speed maglev train.