Multi-factor combined aging experiment method for bushing main insulation

Abstract

The invention discloses a multi-factor combined aging experiment method for bushing main insulation. An experiment system is firstly built, and a capacitor core (3) is subjected to wetting treatment and insulation oil (7) is heated; thermal aging- and mechanical vibration-aging treatment is then carried out on the capacitor core (3), impact load is applied to the capacitor core (3) after the wetting process is over, the moisture-distribution state of an outer insulation layer of the capacitor core (3) is recorded, the degree of polymerization DP(t) at the time after the thermal aging process of the capacitor core (3) is over is calculated, and the aging state is evaluated. Based on the aging method, the moisture distribution and diffusion state of a traction transformer bushing under a harsh environment and impact load can be simulated, the experiment efficiency is greatly improved, and great significance is realized for study on the aging mechanism of the traction transformer bushing main insulation and evaluation on the wetting state of the traction transformer aged bushing.

Description

technical field [0001] The invention relates to the technical field of life research and diagnosis of electric equipment, in particular to an experimental method for multi-factor combined aging of the main insulation of bushings. Background technique [0002] With the rapid development of the rail transit industry, the reliability of traction power supply equipment has become an important factor restricting the further development of the industry. The high-voltage bushing is the main accessory device of the traction transformer, and the main insulation is the capacitor core. Its deterioration has an important impact on the traction transformer and even the entire power supply system. During the operation of the main insulation of the traction transformer bushing, many factors such as heat, mechanical stress, and moisture intrusion force its insulation state to continuously deteriorate, and the aging products further accelerate the aging rate of the capacitor core. In additi...

AI Technical Summary

Problems solved by technology

During the operation of the main insulation of the traction transformer bushing, many factors such as heat, mechanical stress, and moisture intrusion force its insulation state to deteriorate continuously, and the aging products further accelerate the aging rate of the capacitor core

In addition, the load of the traction transformer bushing has strong impact characteristics. Compared with the traditional bushing, although the average load borne by the traction transformer bushing is low during operation, it has the characteristics of large short-term load and severe temperature rise when overloaded.

[0003] The aging process of the main insulation of the bushing by the traditional aging device, the simulated aging process is also relatively simple, which cannot fully reflect the complex and harsh operating conditions of the traction transformer bushing, and the damp treatment usually treats the bushing as a whole , damp inefficiency

Images