Partial discharge test system for cable buffer layer under extremely uneven electric field

Abstract

The invention relates to a partial discharge test system for a cable buffer layer under an extremely uneven electric field. The partial discharge test system is mainly characterized by comprising an alternating-current voltage source, a high-voltage electrode, a grounding electrode, a shielding box and a partial discharge acquisition device; the high-voltage electrode, the grounding electrode andthe to-be-tested sample are installed in the shielding box and used for shielding electromagnetic interference signals. The high-voltage electrode is connected with the high-voltage side of the alternating-current voltage source through the protective resistor, the grounding electrode is connected with the ground wire side of the alternating-current voltage source, a to-be-tested sample is placedbetween the high-voltage electrode and the grounding electrode and is in close contact with the high-voltage electrode and the grounding electrode, and the partial discharge acquisition device is installed between the grounding electrode and the ground wire side of the alternating-current voltage source. According to the invention, the high-voltage electrode, the grounding electrode and the to-be-tested sample are installed in the shielding box, so that external noise signals are effectively shielded, data measurement is carried out more accurately, partial discharge pulse waveforms can be analyzed, different types of discharge sources are distinguished through fuzzy clustering analysis, separation of discharge signals is realized, and the partial discharge test requirement is met.

Description

technical field [0001] The invention belongs to the technical field of high-voltage equipment, in particular to a partial discharge test system for a cable buffer layer under an extremely uneven electric field. Background technique [0002] With the continuous development of my country's economy, the demand for electricity is also increasing. However, my country's load center and energy center present the characteristics of reverse distribution. In order to solve this problem, my country adopts the development strategy of "West-to-East Electricity Transmission". Cable transmission has the characteristics of high reliability, good safety and strong adaptability, and it will be the main way of power transmission in the future. Due to the excellent mechanical properties, stable chemical properties and good electrical properties of high-voltage XLPE cables, they are widely used. According to incomplete statistics, the utilization rate of high-voltage XLPE cables has exceeded 90...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art, to propose a cable buffer layer partial discharge test system under an extremely uneven electric field, which solves the problem of the partial discharge test of the cable buffer layer under an extremely uneven electric field and the analysis of the impact of the electric field distribution on the buffer layer. The problem of the influence of partial discharge characteristics

Images