System and method of vehicle cable terminal frequency domain dielectric spectrum experiment in operation condition

Abstract

The present invention discloses a system and method of vehicle cable terminal frequency domain dielectric spectrum experiment in an operation condition. The system comprises an experiment box body, and a cable terminal sample body, an insulation state detection unit, a cable terminal sample body, a frequency domain dielectric spectrum test system and a temperature regulation system 1 arranged in the experiment box body. The cable terminal sample body 21 is a cable terminal through processing, a hollow cylinder with small diameter is drilled out from the center of an internal cable core 31, and a resistance heating bar 32 passes through a hollow cylinder center and is connected with a radio-frequency power supply 6 through a wire. A function for simulation of temperature operation of cable in the load condition is realized. The obstacle caused by high cost and large size of the operation environment of a current phytotron simulation cable for the cable dielectric spectrum experiment is overcome so as to satisfy the research need, and the simple and practicable system and method of the vehicle cable terminal frequency domain dielectric spectrum experiment in the operation condition are provided.

Description

technical field [0001] The invention belongs to the field of vehicle-mounted cable insulation state detection, and specifically relates to a frequency-domain dielectric spectrum experiment system and method of a vehicle-mounted cable terminal under operating conditions, which can realize the frequency domain of the vehicle-mounted cable terminal under the condition of frequent temperature changes when the vehicle-mounted cable terminal is under load. Dielectric spectroscopy test. Background technique [0002] As the main energy transmission equipment in the running process of the locomotive, the on-board cable is the key to ensure the safe operation of the locomotive. When electric locomotives and EMUs are operating in Northwest my country, the working environment of cable terminals is quite harsh. After being affected by various factors such as high and low temperature alternation for a long time, it will accelerate the downward trend of the insulation state of cable termin...

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Problems solved by technology

[0003] At present, the dielectric spectrum experiments for cables are mainly carried out in the laboratory, and the internal temperature and external temperature of the cable are not well restored. Among them, there are very few studies on the special working conditions under the condition of frequent temperature changes in Northwest my country. The climate chamber can simulate the operating environment of the cable, but its high cost and large size make it not widely used, which hinders the study of cable dielectric spectrum experiments in this environment. Therefore, it is necessary to study an operating environment. Simple and easy experiment system and method for frequency-domain dielectric spectrum of vehicle-mounted cable terminals

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