Research Of Acoustic Vibration Technique In Post Insulator

Along with the renovation project of the power equipment, the ratio of the number of approach or exceed the critical limit is still high, especially high-voltage power distribution equipment, including high-voltage circuit breaker. The practice of running high voltage circuit breaker important components affecting the reliability of its work is the pillar of porcelain insulators, its mechanical strength is the emphasis must be checked. Breaker and high voltage switch to cause the failure rate due to breakage of the insulator is still very high, accompanied by aging insulators scrapped probability increases. Practice has proved that the most cases, the main reason for the damage of s is that the basic process of the pieces of porcelain production r, or by changing the temperature and the switching operation of the fatigue damage. The insulator destruction lead to user power outages and accidents. Of many grid enterprises and power stations want tot prevent such destruction by effective methods to identify external and internal defects in its running. To this end, the State Grid Corporation has been awarded "72.5kV and above voltage level post insulators supervision requirements". Implementation of these provisions, a significant impetus to the technical state of the power companies to take timely measures and means to diagnose insulator.To the pillar with disconnector switch insulators for the study, various types of laboratory equipment to the Yunnan Electric Power Research Institute of Metal Research as the basis, comparing various post insulators detection methods, in order to seek a fast, accurate, safe and detection of charged job. After detecting insulators manufacturers recommend equipment and technology, and also have access to information related to non-destructive testing in domestic and foreign, found the vibro-acoustic detection, commonly known as acoustic vibration detection theory to meet these requirements, and therefore this paper as a method to acoustic vibration detection by software ALGOR finite element vibration to simulate various defects, view of the changes in modal information to verify the feasibility of the method theoretically; frequency experiments by laboratory measurements of the support insulator for HOkV and the220kV substation experiments to investigate the practical feasibility, we emphasize that the feasibility of, and not quite sure that it has completely successful, is mainly the result of the integrated device is not satisfactory due to field operations personnel action and environmental interference makes dare qualitative judgment insulator problems, need all the improvements excited, but also because the scene is charged operation somewhat difficult to find a sufficiently high energy excitation, these difficulties are due to the high voltage insulator individual need depth research scholars here.