Hydro-quebec

Lionel Reynaud

Daniel Pineau

Martin Charette

An apparatus and method for detecting a partial discharge produced at a discharge site in electrical equipment or accessories are provided. The apparatus includes two sensors having an operating range below 30 Megahertz, between 5 and 30 Megahertz, between 14 and 20 Megahertz, or centered at 18 Megahertz. The apparatus includes an acquisition module, a processor and an alarm module producing an alarm upon detection of a partial discharge in the electrical equipment or accessories. The method includes detecting magnetic fields with the sensors, generating and receiving two signals and producing a resulting signal by processing the two signals. The processor is configured to issue alarm instructions if the resulting signal exhibits a property representative of a detection of the partial discharge and otherwise remain in a standby state (ready for signal detection). The method includes generating an alarm after issuing the alarm instructions.

Partial discharge detector and associated method

The locating of a fault on a de-energized power line section is carried out by measuring a reflection signal characterizing the fault and deriving from a voltage signal applied on the section. An application of the voltage signal and corresponding measurements of reflection signals are simulated with a model of the section for a fault located at different locations along the section. The simulated reflection signals are compared with the measured reflection signal. A location of the fault is located based on the location of the fault for the simulated reflection signal having a highest correlation with the measured reflection signal.

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Longueuil, Canada

Lionel Reynaud