基于振动声学原理的瓷柱探伤检测的研究

Flaw Detection for Ceramic Pillar Insulators Based on Vibrational Acoustics

支柱式瓷绝缘子是保证高压断路器等电气设备工作可靠性的重要组成部分。其运行工况与电气设备的健康运行息息相关。笔者首先分析了支柱式瓷绝缘子老化的原因和特征,对断路器等支柱式瓷绝缘子的诊断方法进行归纳总结,着重研究了1种基于振动声学的瓷柱探伤方法,完成3个变电站瓷柱绝缘子的在线检测工作,并将其与离线测试相比较,证明了采用振动声学原理的带电检测瓷柱探伤方法的可行性。

Ceramic pillar insulators play an important role in ensuring reliability of electrical equipment, such as high voltage circuit breaker. In this study, the aging causes and characteristics of the ceramic pillar insulator are analyzed, and the corresponding diagnostic methods are summarized. Consequently, a flaw detection method based on vibrational acoustics was proposed for ceramic pillar insulators, which is suitable for high altitude areas in northwest region of China. with the proposed method, verifies the feasibility of acoustics. Online detections of the ceramic pillar and the detection results were compared the proposed flaw detection method for insulators in three substations were conducted with that of off-line detections. The comparison ceramic pillar insulators based on vibrational