Study on the ultra-wideband characteristics of some typical interference signals

As is well known the accuracy and credibility of partial discharge measurement might be influenced seriously by surrounding interference. Using the technique of ultra-wideband partial discharge detection, we have studied the characteristics of some typical period interference and random interferences, including brush discharge interference, operating high-voltage interference, operating computer interference, rectifier interference and so on. The experimental results that the characteristics of these interferences can be distinguished either in time-domain or in frequency-domain, particularly, based on the characteristic frequency peak and the shape of characteristic peak by using digital analysis technique. It is helpful for the development of the insulation diagnosis technique