Grounding fault diagnosis and insulation detection methods of train power supply system and device

Abstract

The invention relates to grounding fault diagnosis and insulation detection methods of a train power supply system and a device. A passenger vehicle grounding fault diagnosis method of the DC600V train power supply system includes: acquiring a leakage current waveform frequency spectrum of a passenger vehicle under each of multiple grounding fault modes in advance, and establishing a correspondence relationship of the grounding fault mode and the leakage current waveform frequency spectrum; when a grounding fault of the passenger vehicle is detected, collecting a current leakage current waveform of the passenger vehicle, and calculating and obtaining a current leakage current waveform frequency spectrum; and according to the correspondence relationships, determining a grounding fault modecorresponding to the current leakage current waveform frequency spectrum.

Description

technical field [0001] The invention relates to the technical field of electric trains, in particular to a ground fault diagnosis and insulation detection method and device for a DC600V train power supply system, and a computer-readable storage medium. Background technique [0002] DC600V train power supply system is widely used by trains. The ground fault protection device in the DC600V train power supply system is an important part to ensure the safe operation of the train and the personal safety of passengers. [0003] The structure of the DC600V train power supply system is relatively complex. It includes multiple functional units such as rectification, DC, and inverter, and involves two parts, the locomotive and the passenger car, so there are multiple ground fault modes. The application environment of the DC600V train power supply system is also very complicated, and it is often used on passenger trains, and there are many human factors on the train, which increases t...

AI Technical Summary

Problems solved by technology

In actual work, due to the influence of many factors such as equipment aging, environment, and human factors, there are often many faults and inconsistencies in the detection devices of locomotives and passenger cars, which bring a lot of trouble to the normal operation of trains

There is no effective solution to this problem of inconsistency in fault alarms

In addition, the traditional power supply fault detection device cannot diagnose the fault conveniently and accurately, and cannot effectively provide the location information of the fault point. These defects have brought great inconvenience to the staff in the engineering practice of train factory commissioning, maintenance, etc.

Images