基于紫外图谱的盘式绝缘子放电强度径向分布研究

Radial Distribution of Discharge Intensity about Disk-shaped Insulator Based on Ultraviolet Image

为研究盘式绝缘子积污放电的紫外图谱特征,提出了一种基于图像分割的光斑面积计算方法。首先,基于C-V模型,开展积污绝缘子紫外图像径向分布的研究。接着,与红外温度场曲线进行对比研究,验证其合理性。最后,研究不同电阻率、风速情况下积污绝缘子的紫外图谱特征。研究结果表明:C-V模型应用于图像处理中,具有较强的抗干扰性,适用于盘式绝缘子径向放电强度的研究;随着表面电阻率的降低,盘式绝缘子紫外光斑面积会增大;风速对盘式绝缘子放电强度有明显的影响;研究结果可为盘式绝缘子径向放电强度的评估提供一定的参考。

A method for calculating the flare area based on image segmentation is proposed to study the ultraviolet image characteristics of the wet-contaminated discharge of disk-shaped insulators.First,based on the C-V model,the radial distribution of an ultraviolet image of a disk-shaped insulator is studied.It is then compared with the infrared temperature-field curve to verify its rationality.Finally,the ultraviolet image characteristics of the wet-contaminated insulators with different electrical resistivities and wind speeds are studied.The results show that the C-V model has strong anti-interference performance when applied to image processing,and is suitable for the study of the radial discharge intensity of disk-shaped insulators.The ultraviolet flare area of the insulator increases with a decrease in the surface resistivity.The wind speed has an obvious influence on the discharge intensity of the disk-shaped insulator.The results provide a reference for evaluating the radial discharge intensity of disk-shaped insulators.