High-performance epoxy insulating part internal defect simulation system, method and application

Abstract

The invention belongs to the technical field of high-voltage tests and discloses a high-performance epoxy insulator internal defect simulation system and method and application. The system comprises a power frequency AC power supply module, a discharge chamber module, a detection module and a defect model, wherein the AC power supply module is connected with the discharge chamber module and is used for providing and controlling high voltage in the discharge chamber module through a non-partial discharge test transformer; the discharge chamber module comprises a discharge cavity, the discharge cavity is used for providing a high voltage and a discharge environment required by an experimenter for a defect model, the defect model is arranged in the discharge cavity, and the discharge cavity is connected with a high voltage end of the non-partial discharge test transformer; and the detection module is used for detecting a discharge signal when the defect model discharges. According to the system, different defect models are set to simulate the types of defects possibly appearing in the epoxy insulating part in the actual production and operation process, the system has the characteristic of being closer to actual faults, and meanwhile, the system has good accuracy and response speed.

Description

technical field [0001] The invention belongs to the technical field of high-voltage testing, and in particular relates to a high-performance epoxy insulator internal defect simulation system, method and application. Background technique [0002] At present, gas insulated switchgear (GIS) has been widely used in power systems due to its high reliability and small footprint. At present, most insulators in GIS are casted with epoxy resin. Due to processing technology problems, improper transportation and installation, and even mechanical vibration during operation, cracks or bubbles may occur in the insulator, forming air gap defects in the insulator. Long-term operating conditions The lower air gap defect will gradually expand and cause partial discharge in the GIS. Long-term partial discharge will accelerate insulation aging and degradation and eventually lead to equipment insulation breakdown, which will cause equipment failure and may cause huge losses. Therefore, effective...

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Problems solved by technology

Considering that the current partial discharge fault detection and diagnosis of epoxy insulation parts is facing a huge bottleneck, the site environment is complex and changeable, and the causes of air gaps are various, and the reference sample library for detection is mostly obtained in the laboratory. The discharge spectrum is relatively simple and difficult to meet the engineering needs. This may be the key reason for the poor on-site diagnosis. Therefore, a reasonable experimental platform is designed to simulate the defects that may exist in practice, and the experimental data under different defects can be obtained to supplement the air gap defects. Type, rich defect database

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