基于振动模态分析的高压瓷套无损检测研究

Research on the Nondestructive Detection of High Voltage Porcelain Bushing Based on Vibration Modal Analysis

近年来,电力系统中高压瓷套开裂事故的发生严重影响了电力系统的运行安全,须对高压瓷套进行有效检测以确保电网安全运行。文中首先从理论方面论证了振动法检测高压瓷套缺陷的可行性,然后设计实验对完好和损坏的高压瓷套进行模态实验,通过分析各阶模态固有频率的变化,最终得到振动法检测高压瓷套缺陷的判断方法,为高压瓷套的振动法检测技术的后续研究和应用推广提供了重要依据。

In recent years, the cracking the operation safety of power system, and ensure the safe operation of power system. fects of high voltage porcelain bushing is the modal experiment of the intact and of each mode, the method of vibration search and application of the vibration accident of high voltage porcelain in power system has seriously affected it is necessary to detect the high voltage porcelain bushing effectively to In this paper, the feasibility of the vibration method for detecting the dedemonstrated in theory, and then the experiment is designed to carry out damaged detection detection porcelain bushing. By analyzing the change of the natural frequency is finally obtained. It provides an important basis for the further re- technology of high voltage porcelain bushing.