Frequency-domain dielectric spectrum experimental system and method for vehicle cable terminal under different temperature conditions

Abstract

The invention discloses a frequency-domain dielectric spectrum experimental system for a vehicle cable terminal under different temperature conditions. The frequency-domain dielectric spectrum experimental system is composed of a high-temperature heating simulation system, a low-temperature environment simulation system, a temperature control system and a frequency-domain dielectric spectrum test system; and the high-temperature heating simulation system is arranged in a cavity of the low-temperature environment simulation system, and the temperature control system and the frequency-domain dielectric spectrum test system are arranged outside the cavity of the low-temperature environment simulation system. On the basis of the experimental system, a provided experimental method can be used to simulate temperature change in a relatively wide range of the vehicle cable terminal and further conduct frequency-domain dielectric spectrum experiments of the vehicle cable terminal under the different temperature conditions, the economical and applicable performances are higher, and the system and method have significance in detecting and evaluating the insulation aging state of the vehicle cable terminal.

Description

technical field [0001] The invention belongs to the field of insulation state detection of vehicle-mounted cable terminals, and in particular relates to a frequency-domain dielectric spectrum experiment system and method of vehicle-mounted cable terminals under different temperature conditions. Background technique [0002] On-board high-voltage cables are the most critical part of the high-voltage equipment of high-speed EMUs and electric locomotives. The role of EMUs or locomotives in connecting various high-voltage equipment and transmitting electric energy is irreplaceable. However, in the northwestern region of my country, explosion accidents of high-voltage cable terminals on electric locomotives occur frequently, resulting in huge economic losses and endangering driving safety. Due to its geographical particularity, on-board cables often experience huge temperature changes of tens of degrees within a day. This change greatly tests the insulation state of the exposed o...

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Problems solved by technology

[0003] The current mainstream method for research on the frequency-domain dielectric spectrum of vehicle-mounted cable terminals under different temperature conditions is to establish an artificial climate chamber and change the temperature conditions in the artificial climate chamber. However, the artificial climate chamber is too large, the construction period is long, and the operation cost is huge. , when the temperature range is too large, the time required for the artificial climate chamber to adjust the temperature is too long, resulting in high construction costs and experimental costs. Therefore, a vehicle-mounted cable terminal frequency-domain dielectric spectrum experiment system under different temperature conditions is required and method to realize the measurement of the frequency-domain dielectric spectrum of vehicle-mounted cable terminals in a large temperature range

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