Preprocessing Circuits for Partial Discharges Measurement
M. Kriz
Abstract:
Normally cavities or voids included in electrical insulation are filled with gases, which have lower breakdown strength than the surrounding insulation. Under the normal working conditions of the insulation system, the voltage across the cavity may exceed the breakdown value of the filling gas and cause a breakdown in the cavity. This phenomenon is called Partial Discharge (PD). This research is focused on methods using basically detection and quantification of PD charge per the voltage pulses in charge sensitive amplifier. Two different principles of processing PD events are used - analog and digital technique. This method is useful for non-destructive and non-invasive on- line diagnostic systems.
