A Partial Discharge Test System of Cable Buffer Layer under Extremely Uneven Electric Field

Abstract

The invention relates to a partial discharge test system for cable buffer layer under extremely uneven electric field. The test sample is installed in the shielding box to shield the electromagnetic interference signal. The high-voltage electrode is connected to the high-voltage side of the AC voltage source through the protective resistor, and the grounding electrode is connected to the ground side of the AC high-voltage source. The sample to be tested is placed on the high-voltage electrode and the grounding electrode. In close contact with each other, the partial discharge collection device is installed between the ground electrode and the ground side of the AC voltage source. The invention installs the high-voltage electrode, the ground electrode and the sample to be tested in the shielding box, effectively shields the external noise signal, performs data measurement more accurately, can analyze the partial discharge pulse waveform, and distinguish different The type of discharge source realizes the separation of discharge signals and meets the requirements of partial discharge testing.

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