Detection of wire element breakage in power transmission line using HTS-SQUID
Detection of wire element breakage in power transmission line using HTS-SQUID
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DOI：
10.1016/j.physc.2009.05.086
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发表时间：
2009-08-01
影响因子：
1.7
通讯作者：
Tanaka, S.
中科院分区：
文献类型：
--
作者：
Miyazaki, A.;Hatsukade, Y.;Tanaka, S.
提出了利用HTS-SQUID梯度仪无损检测架空输电线路压缩导线接头断线的方法。在本研究中，我们制备了一种铝导体断线钢增强（ACSR）传输线。ACSR电缆的两端用铝套压缩。通过在套管两端施加交流电压，向电缆轴注入交流电流。然后用HTS-SQUID梯度仪测量了电缆上方磁场梯度的二维分布。在有断线的压缩ACSR中，场梯度沿断线的螺旋方向周期性变化。相比之下，没有缺陷的ACSR电缆上面没有出现这种变化。这些结果表明，用该方法检测压缩导体接头中的断线是可行的。我们还进行了电磁场仿真来验证实验结果。(C) 2009 Elsevier B.V.版权所有
We have proposed the application of nondestructive evaluation (NDE) using HTS-SQUID gradiometer to detect wire breakage in compressive conductor joints in overhead transmission line. In this study, we prepare an aluminum conductor steel reinforced (ACSR) transmission line with a broken wire. The ends of the ACSR cable were compressed with Al sleeves. An AC current was injected toward into the cable axis by applying AC voltage across the both ends of the sleeves. Then the two-dimensional distribution of magnetic field gradient above the cable was measured by a HTS-SQUID gradiometer. In the case of the compressed ACSR with a wire breakage, the field gradient changed periodically along the spiral of the broken wire. In contrast, such changes did not appear above the ACSR cable without defects. These results suggested the possibility to detect the wire breakage in the compressive conductor joints by this method. We also conducted electromagnetic field simulation to verify the experimental results. (C) 2009 Elsevier B.V. All rights reserved.