| 摘要 |
The invention relates to methods and devices for locating partial discharges in electric cables, comprising a high-voltage source which is coupled to the cable to be tested, an outcoupling unit which is connected to one end of the cable, and a data processing system which is connected to the outcoupling unit via a sensor unit and which ascertains a partial discharge or partial discharges from the sensor signals when present. The methods and devices are characterized in particular by a short analysis duration of the locating process. This is achieved by detecting events, parameterizing the events detected as pulses, pairing the parameterized events which are detected as pulses, classifying the event pairs, assigning a partial discharge on the basis of the classification, and determining the location of the partial discharge(s) from the delay between the respective partial discharge and the reflection corresponding to the partial discharge. |
