On April 15, in the defect simulation laboratory of State Grid Ningxia Suzhou Electrical Apparatus Science Academy Co.Ltd(300215) power grid equipment, laser beams swept over the surface of “bird egg” insulator, and the clear 3D picture of computer software gradually took shape, which marked the success of the “specialist” team of power grid equipment in restoring the fault mechanism by using new technologies of 3D stereo scanning and 3D printerp align=”center”>
3D scanning technology is a combination of structured light technology, phase measurement technology, 3D vision technology and composite 3D non-contact measurement technology. It can create the digital model of actual objects in the virtual world and can be used in industrial design, defect detection, reverse engineering, biological information, criminal identification, digital cultural relics collection and other scenes Suzhou Electrical Apparatus Science Academy Co.Ltd(300215) expert team boldly innovated and practiced the application of 3D scanning technology to defect detection of power equipment. Through continuous scanning exploration of multiple wire harnesses, accurate comparison of double “bird egg” models, and using scanning accuracy up to 0.1mm, the processing deviation of two insulator inserts less than 1mm is presented on the three-dimensional real scene. When the color difference displayed by 3D image superposition gradually appears, Suzhou Electrical Apparatus Science Academy Co.Ltd(300215) expert team shouted excitedly “success, success”.
It is reported that the fault diagnosis and analysis of the team’s innovative method is a major breakthrough in anatomical analysis for the “specialist” of power grid equipment to track defects for 100 days. Since January 4 this year, 110 kV bus equipment of a very important 220 kV Substation in Yinchuan, Ningxia has been abnormal. Suzhou Electrical Apparatus Science Academy Co.Ltd(300215) organized electrical, metal and other professional cooperation to comprehensively and deeply evaluate and diagnose the insertion depth of internal bus in abnormal parts of GIS by means of ultrasonic partial discharge, UHF partial discharge, nondestructive testing, X-ray testing and so on, It is determined that intermittent suspension discharge is caused by poor connection between a support insulator and a guide rod in the equipment. From April 12 to 14, Suzhou Electrical Apparatus Science Academy Co.Ltd(300215) kept an eye on the disassembly of the equipment and found that there were black discharge traces inside the equipment, and the discharge location, discharge nature and defects were completely consistent with the previous analysis and judgment.
What is the root cause of defects? The team took the disassembled 6 insulators back to the laboratory for in-depth research, which realized the successful practice of GIS fault diagnosis by Ningxia power grid using the new 3D stereo scanning technology for the first time, and added another successful case of the whole process of power grid equipment detection, diagnosis, analysis and governance to the team’s fault diagnosis and analysis.
