Application of squaring — Low pass filtering — Square rooting method for enveloping partial discharge waveform

The existence of partial discharge inside the insulator becomes the main parameter indicating that the insulator is in bad condition. Therefore, the diagnosis of the presence of partial discharge on the insulator becomes very important to do especially on insulators attached to a large power system. There are several tools commonly used to detect the presence of Partial Discharge inside the insulator. One of them is by using UHF sensor. Partial Discharge Detection using the UHF sensor produces an unsmooth and oscillatory signal waveform Partial Discharge that makes it difficult to determine the parameters of the signal. to overcome the problem, we have to do signal processing which one of them can be done by enveloping against the irregular signal. envelop method that will be used in this research is Squaring — Low Pass Filtering — Square Rooting method applied to Partial Discharge signal detected by Detecting Impedance, Loop Antenna, and HFCT. then the envelop results from each of these sensors will be compared to find out the success of the envelop method used.