Method and device for ground fault diagnosis and insulation detection of train power supply system

Abstract

The invention relates to a ground fault diagnosis and insulation detection method and device for a train power supply system. A method for diagnosing a ground fault of a passenger car in a DC600V train power supply system includes: obtaining in advance the leakage current waveform spectrum of a passenger car in each ground fault mode among multiple ground fault modes, and establishing a corresponding relationship between the ground fault mode and the leakage current waveform spectrum ; When the ground fault of the passenger car is detected, the current leakage current waveform of the passenger car is collected, and the current leakage current waveform spectrum is calculated; and according to the corresponding relationship, the ground fault mode corresponding to the current leakage current waveform spectrum is determined.

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, device and computer-readable storage medium of a DC600V train power supply system. Background technique [0002] The 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 rectifier, DC, and inverter. The space involves two parts, the locomotive and the passenger car. Therefore, there are various ground fault modes. The application environment of the DC600V train power supply system is also very complex, and it is often applied to passenger trains, and there are many human factors on the train, which increa...

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.

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