中国电力 ›› 2018, Vol. 51 ›› Issue (12): 95-100.DOI: 10.11930/j.issn.1004-9649.201804074

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气体绝缘输电线路铝制外壳焊缝无损检测试验对比分析

乔亚霞1, 罗宏建2, 张鹏飞1, 张浩1   

  1. 1. 中国电力科学研究院有限公司, 北京 100055;
    2. 国网浙江省电力有限公司电力科学研究院, 浙江 杭州 310014
  • 收稿日期:2018-04-17 修回日期:2018-08-01 出版日期:2018-12-05 发布日期:2018-12-13
  • 作者简介:乔亚霞(1977-),女,高级工程师,从事电网建设和电源建设的新材料加工、应用等研究,E-mail:qyx@epri.sgcc.com.cn
  • 基金资助:
    国家电网有限公司科技资助项目(特高压GIL长管道焊接与接头完整性评价技术研究,JZB11201801751)。

Comparative Analysis on PA and UT Technologies in Defect Detection Rete of Gas-insulated Enclosed Electrical Equipment Enclosure

QIAO Yaxia1, LUO Hongjian2, ZHANG Pengfei1, ZHANG Hao1   

  1. 1. China Electric Power Research Institute, Beijing 100055, China;
    2. State Grid Zhejiang Power Supply Company, Hangzhou 310014, China
  • Received:2018-04-17 Revised:2018-08-01 Online:2018-12-05 Published:2018-12-13
  • Supported by:
    This work is supported by Science and Technology Project of SGCC(Research on Welding Technology and Joint Integrity Evaluation Technology for UHV GIL Long Pipes, No.JZB11201801751).

摘要: 通过对铝制壳体缺陷试样检测的试验和仿真分析,研究比较了相控阵检测(PA)、常规射线检测(RT)和常规超声检测(UT)3种检测方法对气体绝缘输电线路铝制外壳焊缝检测的有效性。试验结果表明,对于危害性比较大的面积型缺陷,超声检测及相控阵超声检测的检出率优于射线检测;相控阵检测更容易找到检出缺陷的最佳角度,具有更高的危害性缺陷检出率,能获得更多的缺陷特征信息。试验结果为苏通综合管廊工程气体绝缘输电线路(GIL)外壳无损检测工艺制定提供了依据。

关键词: 输电线路, GIL, 铝制外壳, PA, RT, UT, 缺陷检出率

Abstract: Based on the test and simulation analysis of aluminum shell defect specimens, three methods of phased array inspection (PA), conventional ray test (RT) and conventional ultrasonic testing (UT) for welding seam detection of aluminum shell of the gas-insulated transmission lines were studied and compared. The test results show that the detection rate of UT and PA is superior to that of RT for face-type defects with greater hazards.Phased array detection (PA) is easier to detect the best angle of defects, has a higher detection rate for hazardous defects. Moreover, PA can obtain more information of defect feature. The test results provide a basis for the non-destructive testing process of gas insulated transmission line (GIL) shell in Sutong pipeline corridor project.

Key words: transmission line, GIL, aluminum housing, PA, RT, UT, defect detection rate

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