Typical fault simulation method for ethylene-propylene rubber cable terminal insulation layer

Abstract

The invention discloses a typical fault simulation method for an ethylene-propylene rubber cable terminal insulation layer, wherein a fault simulation terminal of a simulator is packaged in a cold-shrinkable outer umbrella skirt, the ends of cable core plugs at both ends protrude from the cold-shrinkable outer umbrella skirt, one end of a copper grounding wire is connected to a metal shielding sleeve, and the other end is connected to a copper grounding wire interface, a waveform collecting device is connected to a pulse coupler, and the pulse coupler is sleeved on the copper grounding wire. The evaluation method comprises the steps of obtaining a standard discharge waveform of the ethylene-propylene rubber cable terminal, calculating a fitting curve model, calculating a waveform curve offset determining factor, then performing the evaluation analysis, and the like. The typical fault simulation method for an ethylene-propylene rubber cable terminal insulation layer has the beneficial effects that the typical defect fault of the ethylene-propylene rubber cable terminal insulation can be simulated realistically, effectively and conveniently, and the multi-type faults can be simulatedsimultaneously to realize multi-dimensional simulation; and the evaluation method can identify the types of faults and achieve a comprehensive and accurate assessment for the terminal state of insulation.

Description

Technical field [0001] The invention belongs to the field of high-speed railway motor car cable terminal fault evaluation, and particularly relates to a typical fault simulation method of an ethylene-propylene rubber cable terminal insulation layer. Background technique [0002] With the continuous electrification of my country’s railways and the rapid development of high-speed railways, electric locomotives and EMUs play an increasingly important role in railway transportation. Therefore, ensuring the safe and reliable operation of train power supply systems and transmission systems has become An important aspect to ensure the safe operation of railways. However, during the operation of the train, it is often affected by the harsh external environment, impact load, overvoltage, small turning radius of the train, and high mechanical stress. The ethylene-propylene rubber cable of the train that undertakes the power transmission task, especially the terminal part, will be affected. ...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the detection of typical defects and faults of cable terminals are carried out based on relatively simple methods such as shaking meters, the recognition rate is low, and the recognition effect is limited. There is an urgent need for a method that can effectively detect and identify typical faults inside the terminal.

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