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System background:

The existence of any mechanical faults and defects inside the power equipment may affect the overall performance and safety of the equipment, and even cause power outages in some areas or even all areas under its jurisdiction. Due to the structural reasons of some power equipment, a large amount of investment is required during power outage maintenance. The manpower and material resources take a long time to repair, causing great impact and loss. Therefore, before the failure of power equipment, it is particularly important to be able to detect and determine the location, nature and extent of its internal defects.

System functions:

Without power failure or disintegration, defects in the mechanical structure of the equipment were found. By performing multi-dimensional X-ray fluoroscopy imaging of power equipment, combined with dedicated image processing and recognition technology, the "visualization" of its internal structure and rapid diagnosis of operating conditions can be achieved, which can greatly improve the accuracy of equipment fault location and discrimination.

Technical principle:

Utilizing the attenuation characteristics of X-rays when propagating through the medium, when X-rays of uniform intensity are generated and emitted from one side of the device under test, because the attenuation characteristics of the rays at the defect site and the base material of the device under test are different, the transmission The inspection side detects the intensity of the X-rays remaining after passing through the inspected equipment to determine whether there is a defect on the surface or inside the inspected equipment, and can judge the type and nature of the defect based on the X-ray image generated.

Application Status:

Existing X-ray inspection products are general-purpose products, not developed for the power industry, and are not really used in power production. The equipment has a high cost of ownership, low economy, complicated structure of the equipment under test, large volume of X-ray equipment, difficult to place and locate, lack of dedicated software for on-site inspection, and image processing, fault location, and intelligent identification analysis for power equipment Function, low data utilization.

Detection mode:

Newly-built GIS equipment: The components before installation are screened and inspected after installation is completed and before operation, and various defects in the manufacturing, transportation, and installation processes are found, and equipment health files are established.

Substation GIS inspection: find defects generated during operation, compare and analyze with historical data in equipment health files, understand equipment deterioration trends, and find potential problems.

Substation GIS overhaul: When abnormal operating conditions are found during overhaul or if other suspected defects cannot be identified or located through other detection methods (such as partial discharge detection), diagnostic testing services are provided for the equipment.

Applicable scene:

X-ray digital imaging non-destructive testing is widely used in fully enclosed structures of power equipment or ordinary power equipment in invisible components in power transformation and transmission systems, including GIS, pillar insulators, tank breakers, porcelain pole breakers, cables, Cable clamps, power cables, etc.