Adaptability Analysis of TOFD Weld Detection for UHV Substation Primary Equipment

doi:10.3969/j.issn.1000-7229.2015.06.014

Abstract

Abstract:

According to the GIS, materials, craft structures and processing characteristics of UHV primary equipment, ultrasonic testing method based on time of flight diffraction (TOFD) was presented for the weld detection of primary equipment. Firstly, the adaptability and parameters selection principle of TOFD ultrasonic testing method were analysed from aspects of equipment material, base metal thickness, etc. Then, two briquettes with different thickness: aluminium alloy and carbon steel, were used for experimental verification. The results show that the welds of aluminium alloy and carbon steel with thickness of about 6 mm and 10 mm above can be detected by high frequency probe with using TOFD method, which can clearly and accurately determine the size, nature, height of defect.

Key words: UHV , substation primary equipment, weld detection, time of flight diffraction

CLC Number:

TM 63

HAN Ninghui， BAO Leqing， WANG Guojun. Adaptability Analysis of TOFD Weld Detection for UHV Substation Primary Equipment[J]. ELECTRIC POWER CONSTRUCTION, 2015, 36(6): 84-88.

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