Multiple-unit train high-voltage equipment insulation state on-line monitoring system

Abstract

The invention belongs to the technical field of rail traffic vehicle and high-voltage electrical equipment on-line insulation monitoring and especially relates to a multiple-unit train high-voltage equipment insulation state on-line monitoring system, which is used for realizing on-line monitoring of the insulation state of 25 kV high-voltage equipment of a multiple-unit train. Through classification of multiple-unit train high-voltage equipment, characteristic quantity screening, wireless transmission, high-voltage induction power obtaining, expert database and fuzzy function operation, the difficulty that a conventional power system on-line insulation monitoring mode cannot be applied to the multiple-unit train, which is characterized by high-speed movement, single-phase power supply, non-single-point grounding, harsh environment and strict requirements and the like, is solved; and the system comprises a data acquisition unit and an analysis and diagnosis unit. The data acquisition unit is used for extracting characteristic quantity of a monitoring object, and transmitting the data in a wireless manner to the data analysis and diagnosis unit for analysis and diagnosis and signal output. The system is reliable in principle, high in precision, high in accuracy, high in safety and good in reliability, is of great significance to promotion of continuous development of the high-speed rail cause, and has good economic benefits and a broad market prospect.

Description

Technical field: [0001] The invention belongs to the technical field of on-line insulation monitoring of rail transit vehicles and high-voltage electrical equipment, and relates to an on-line monitoring system for the insulation state of high-voltage equipment, in particular to an on-line monitoring system for the insulation state of high-voltage equipment of EMUs, which is used for the insulation state of 25kV high-voltage equipment of EMUs Online Monitoring. Background technique: [0002] The EMU train is running at high speed for a long distance. Due to factors such as smog, environmental temperature and humidity changes, and external mechanical stress, the high-voltage equipment of the EMU train will suffer from poor insulation and intermittent discharges, which will bring extreme damage to the normal operation of the train. In severe cases, failures such as train parking accidents or component burnouts may occur. Therefore, in order to avoid the occurrence of similar f...

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Problems solved by technology

[0003] In order to overcome the defects existing in the prior art, the present invention provides an on-line monitoring system for the insulation state of the high-voltage equipment of the EMU, which solves the problem of high-speed movement, single-phase power supply, non-single-point grounding, and harsh environment of the online insulation monitoring method of the conventional power system. , the difficult problem that cannot be applied to the demanding EMU, it can conduct on-line monitoring of the insulation state of the 25kV high-voltage system of the EMU, and carry out functional measures such as positioning, prompting, alarm, and protection according to the diagnosis results of the insulation state, so that the high-voltage equipment of the EMU Prevent failures before they happen

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