Partial Discharge Testing Question & Answer | IEC 60270 Standard | Power System Operation скачать в хорошем качестве

Partial Discharge Testing Question & Answer | IEC 60270 Standard | Power System Operation

Q: How can I determine if there is partial discharge activity in a high voltage asset ? A: There are several methods for doing this and they can be broken down into two groups: conventional testing and non-conventional testing. The conventional method of testing is defined by the IEC 60270 standard, in which the measurement circuit consists of a coupling capacitor to decouple the PD activity, an input impedance and filter for the measurement system, and the measurement instrument. This method requires calibration once the measurement system is in place to ensure that the apparent charge at the test terminals, measured in pC, is representative of the actual discharges taking place in the asset as seen at the test terminals. When using this test method, one of the most effective ways to investigate PD-related issues is to look not only at the magnitude and number of discharges, but also at the phase resolved partial discharge (PRPD) pattern. The PRPD pattern allows for the amplitude in pC and number of discharges to be overlaid with the phase angle of the applied voltage, offering insight into the type and severity of the defect. #PartialDischargeTesting #IEC60270Standard #PowerSystemOperation @powersystemsoperation @powersystemoperation