CAJ | 학술논문

架空线路覆冰是危害电力系统安全运行的重要因素之一,迫切需要准确可靠的覆冰监测方法。为此,运用计算机图形学,利用图像滤波、自适应阈值变换和基于LoG算子的边缘检测技术,提出了一种基于远程在线系统的覆冰厚度图像测量方法。结果表明,在使用现有远程终端采集的图片进行单点覆冰厚度识别时,识别精度与图片分辨率呈正相关。使用高分辨率的图片有助于提高识别精度,且较为直观地观察到输电线路覆冰情况。与基于力学的覆冰计算模型相比,能直接测定单点覆冰厚度,对识别绝缘子上覆冰厚度从而预防冰闪有一定意义。
가공선로복빙시위해전력계통안전운행적중요인소지일,박절수요준학가고적복빙감측방법。위차,운용계산궤도형학,이용도상려파、자괄응역치변환화기우LoG산자적변연검측기술,제출료일충기우원정재선계통적복빙후도도상측량방법。결과표명,재사용현유원정종단채집적도편진행단점복빙후도식별시,식별정도여도편분변솔정정상관。사용고분변솔적도편유조우제고식별정도,차교위직관지관찰도수전선로복빙정황。여기우역학적복빙계산모형상비,능직접측정단점복빙후도,대식별절연자상복빙후도종이예방빙섬유일정의의。
Icing on overhead transmission lines is one of the important factors harming the normal operation of the power system,so a more reliable icing monitoring method is urgently needed.Consequently,using computer graphics,image filtering,transform adaptive threshold value method and edge detection techniques based on the LoG operator,we put forward a method of measuring ice thickness images on the basis of a remote on-line system.Results indicate that,when ice thickness of one point of the line is measured,the accuracy is proportional to the resolution of the picture from the remote on-line terminal.The measured accuracy can be increased by using high-resolution images,and also accurately observed ice conditions of transmission lines.Compared with the mechanics-based calculation model of ice thickness,ice thickness of one point can be directly measured,and the new method has practical significance to prevent ice flashover by measuring the ice thickness of the insulator.