Detection and Cause Analysis of Structural Defects in Lead Clamp Weld of Transformer

2019 3rd International Workshop on Renewable Energy and Development

能源学;生态环境科学

Li, Zhengli^1^2 ; Liu, Guangxing^1 ; Jian, Mingjian^1 ; Feng, Yunguo^1^2 ; Cui, Weitan^1 ; Fu, Tianmeng^2 ; Zhang, Ruifeng^2

State Grid Shandong Electric Power Research Institute, Jinan

250001, China^1

Shandong Electric Power Industrial Boiler, Pressure Vessel Inspection Center Co., Ltd, Jinan

250001, China^2

关键词: Anatomical analysis;    Causes analysis;    Extra high voltage;    Incomplete fusion;    Internal structure;    Nondestructive detection;    Structural defect;    Structural strength;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/267/4/042062/pdf
DOI  :  10.1088/1755-1315/267/4/042062

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In this paper, the causes analysis of the cracking accident at the lead clamp weld-fusion line of transformer in the extra-high voltage substation was conducted. On-site non-destructive detection of weld defects was carried out to determine the size and location of the defects. An anatomical analysis of the clamp sample revealed that there was serious incomplete penetration and incomplete fusion in the internal structure of the weld, which seriously affected the structural strength of the weld. The causes of welding defects were further analyzed, and suggestions for improving product quality and strengthening inspection supervision were put forward.