来源:科技日报 | 2021-01-13 13:42:23 |
近日,国网青海检修公司检修人员在750千伏日月山变电站内开展电缆异常诊断工作中,突破传统方式,首次使用X射线成像检测技术对电缆进行“问诊”“把脉”“拍片”,高效准确分析电缆异常。
X射线成像检测技术作为一种可实时成像的无损检测技术,利用X射线透照被测物体内部,将拍射结果处理转化为数字信号,以图像方式呈现。利用该技术进行电缆异常诊断时,若电缆存在缺陷异常,则该区域透过的射线强度会在图片上产生黑度差异,帮助检修人员快速准确的评估电缆缺陷位置,直观分析缺陷程度。
据了解,以往检修人员采取红外检测、外护层接地电流检测等传统方法进行电缆异常诊断,容易出现电缆缺陷分析不全面、不准确的情况。而使用X射线成像检测技术不仅可以提高电缆异常诊断缺陷的检出率,而且具有检测速度快,仪器便携性强、检测灵敏度高等优点。
目前,该公司已顺利完成750千伏日月山变的异常电缆诊断工作,此项新技术的成功应用不仅实现了在电缆诊断技术上的突破,也为今后青海主电网组合电器、套管、复合绝缘子等设备的缺陷检测处理提供了实际指导意义。(作者: 张蕴)
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