高光谱遥感检测复合绝缘子运行状态技术研究  

Working State Detection of Composite Insulator by Hyperspectral Remote Sensing

作　　者：文志科[1] 孔晨华[2] 闵绚[1] 邵瑰玮[1] 胡霁[1] 付晶[1] 蔡焕青[1] 

机构地区：[1]中国电力科学研究院,武汉430074 [2]国网甘肃省电力公司检修公司,兰州730070

出　　处：《高压电器》2014年第2期75-79,85,共6页High Voltage Apparatus

摘　　要：挂网运行的复合绝缘子若出现劣化,电气绝缘性能降低,若不及时替换将危害线路的安全运行。目前,国内外尚缺乏成熟的绝缘子运行状态检测方法,笔者在研究国内外复合绝缘子检测方法的基础上,首次引入高光谱遥感技术检测复合绝缘子的运行状态。采用高光谱成像仪对不同运行状态的硅橡胶绝缘子伞套及绝缘子串进行影像采集,成功地构建了复合绝缘子样本光谱特征库,并直观地展示了不同运行状态复合绝缘子光谱曲线及其在特征空间中的聚类特性。继而,利用特征光谱库,采用概率判决函数和贝叶斯判别规则对目标绝缘子进行状态检测,结果显示此方法可以准确地检测出绝缘子的运行状态。Deterioration of composite insulators in power grid results in degradation of melr electrlcal insulation performance, harming safe operation of the transmission lines. The existing working state detection methods of composite insulators are insufficient. The authors analyze the existing detection methods of composite insulators in the world, and introduce hyperspectral remote sensing technology to working state detection of composite insulator. Hyperspectral camera is adopted to acquire the hyperspectral images of silicon rubber composite insulators in different working states, and a characteristic spectrum library of composite insulators is thus constructed. The spectrum curves of the composite insulators in different working states and their clustering property in characteristic space are displayed. The characteristic spectrum library is then employed to detect the working state of the target insulator by using the probability decision function and the Bayesian discriminant function. The result shows that the present method can accurately detect working state of composite insulators.

关 键 词：高光谱遥感 复合绝缘子 状态检测 最大似然法 贝叶斯分类 

分 类 号：TM216[一般工业技术—材料科学与工程]