【作者】 陈磊；

【导师】 律方成；

【作者基本信息】 华北电力大学（河北） ， 高电压与绝缘技术， 2010， 硕士

【摘要】 紫外成像是一种新的可视化的电气设备外绝缘放电检测方法,本文通过试验分析了紫外成像仪器增益、观测距离对紫外图像光斑面积和光子数的影响,通过对比提出以紫外图像光斑面积作为紫外图像特征量检测放电;然后利用支持向量机的方法对不同距离、增益下观测到的紫外图像光斑面积做了归一化处理。在论文中,利用紫外成像仪观测了复合绝缘子表面水珠放电和金具放电的特点,并研究了放电对硅橡胶材料憎水性的影响。最后重点分析了污秽放电及其紫外图像特征,提出利用“平稳紫外光斑面积”、“间歇性紫外光斑面积”以及“间歇性紫外光斑重复次数”三个参数来表征污秽瓷绝缘子的放电,以此建立了基于模糊逻辑推理的瓷绝缘子污秽状态预测模型。更多还原

【Abstract】 UV imaging is a new visualization method for detecting external insulation discharge of high-voltage electric equipment. This paper analysis instrument gain, the detecting distance to the UV imaging spot area and photon number influence through experimented. UV imaging spot area is proposed as a UV imaging characteristics for detecting discharge through comparing and analyzing. The UV imaging spot area of different instrument gain and different detecting distance, is normalized with the support vector machine method. Then the paper study the discharge characteristics for the water droplets and fittings of silicone rubber insulator by UV imaging device, and study the effect of corona discharge on the hydrophobicity of silicone rubber. Three characteristic parameters were extracted for Characterizing the pollution discharge with analysis the characteristics of UV imaging of pollution discharge, and the three parameters were as follows: the area of stable UV facula, the area of intermittent UV facula, and the repetition of intermittent UV facula. The insulator contamination condition evaluation model was established with the fuzzy logic inference method.更多还原