＂Ultrasound＂ help solve hidden defect distribution network

January 14, State Grid Liaoning Electric Power patrol officers on the use of ultrasound detectors South A cast of 10 kV lines, Cao lines, big line, and other key line for Pan special patrol, and use the device hidden defects on the line depth investigation . 

It is understood that, with the growing and changing with the grid frame, gradually showing there is some broad multi-faceted, to complex closely with customers and other characteristics. Routine maintenance work distribution network run limit traffic, location, weather, and other factors, especially for porcelain cracks, tree lines ranging, who allowed concealed defects are often difficult to find the eyes at close range or climbers need to accurately found that, to some extent, affected the safe operation of the distribution network. To this end, Liaoning companies in the distribution network to take on the basis of normal operation and maintenance inspections focus on difficult to detect hidden defects to seek a breakthrough. After a field survey and comparative analysis and field testing of a variety of devices, eventually using ultrasonic flaw detection technology based devices hidden defect inspection method, and achieved remarkable results. 

In the inspection process, the patrol officer may use an ultrasonic detector to the wire, porcelain flaw detection test for measuring distance trees and wires, data encoding patrol after the formation of the detector is analyzed and compared by introducing computer software, eventually forming a diagnostic report equipment health status at a glance. In addition, the test technique of the test points, the test angle, temperature and weather are not strictly limited, and can be less than 30 km / h to move the car traveling speed measurement. 

Successful application of this method, greatly reducing the labor intensity of patrol officers, shortening the inspection time, greatly improve the quality of inspections. Currently, the Company has used this technique to detect and promptly eliminate hidden defect distribution network 4, to further improve the operational reliability of the distribution network. (Chen Ting Liu) 

Source: State Grid Electric Power Co., Ltd., Liaoning Province