绝缘子放电声发射试验研究

Experimental Research on Acoustics Emission from Discharge of Insulators

为了解决绝缘子放电源的定位和识别等问题,研究了用两只特制的声发射传感器检测绝缘子的放电声发射波。检测到的信号经自制前置放大器放大滤波显示在示波器上。试验发现该声发射波呈规则的周期性,对应每个工频周期出现两次,信号宽度μs级,不同型式放电声发射信号波形差别显著。

During Acoustics Emission （AE） monitoring of insulator discharges, discharge locating and identifying are very important. AE experiments of insulator discharge are researched in laboratory. In order to locate discharge, two tailor-made AE sensors are used to detect insulator discharge signals. The signals are magnified and filtered in self-made preamplifier. Then the AE signals are triumphantly observed on oscilloscope screen. After a lot of experiments, some characteristics AE signals of insulator discharge are found： the AE signals have regular periodicity and they appear twice in every voltage period. The width of AE signals is in the range of microsecond, and the shape of AE signals is different when discharge is different.