激振-拾振距离对 220 kV 瓷支柱绝缘子 振动检测的影响研究

为解决双节瓷支柱绝缘子的振动检测问题,以220 kV串联瓷支柱绝缘子为研究对象,采取SolidWorks软件建模并导入ANSYS软件中,设置模型参数计算分析;验证了通过振动声学法检测串联双节瓷支柱绝缘子的可行性,同时探究了激振-拾振距离及拾振点在下法兰底端的具体位置对绝缘子检测精度的影响,得到其一般性规律,通过搭建220 kV绝缘子实验台对仿真得到的规律进行验证;最终结论表明,激振-拾振距离对瓷支柱绝缘子的振动检测结果存在影响,对于双节支柱绝缘子,当激振点与拾振点位于通过下法兰中心的同一直线上时,关于下法兰中心对称的两个拾振点所采集信号表现出的频谱特征不随激振-拾振距离变化而变化,并根据实验结果得出型号为B03.8-1的220 kV双节瓷支柱绝缘子的最佳激振-拾振距离为35 mm。

Research on the influence of vibration-pickup distance on vibration detection of 220 kV porcelain post insulator

To solve the problem of vibration detection of double-section post porcelain insulators, this study takes 220 kV series post porcelain insulators as the research object. The SolidWorks software is utilized to model and import them into ANSYS software to set the model parameter calculation and analysis. The detection feasibility of porcelain insulators with series double-section posts by vibroacoustic is verified. Meanwhile, the influence of the vibration-picking distance and the specific location of the vibration pickup point at the bottom of the lower flange on the detection accuracy of the insulators is studied. The general rules are obtained. The achieved simulation rules are verified by building a 220 kV insulator test bench. The final conclusion shows that the excitation-pickup distance has an impact on the vibration detection results of porcelain pillar insulator. For double-section post insulators, when the excitation point and the pick-up point are on the same straight line passing through the center of the lower flange, the frequency spectrum characteristics of the signals collected by the two symmetric pick-up points on the blue center do not change with the change of the excitation pick-up distance. According to the experimental results, it is concluded that the model B03. 8-1 220 kV double-section porcelain pillar insulator is the best. The optimal excitation-the pick-up distance is 35 mm.