Alstom Technology Limited

Guillaume Granelli

Jean-Luc Rayon

Patrice Juge

A method and a device for locating internal arcing that occurs in a compartment (CP) of a gas-insulated line (L), each compartment being provided with at least one pressure sensor (P). The method comprises: triggering pressure measurements in a compartment as soon as the difference between the currents that flow through two current toroids (TC) around two adjacent compartments exceeds a threshold value indicating the occurrence of internal arcing in the compartment; calculating a period &#x394;t that separates the time at which the pressure detector began to detect a pressure variation and the time at which the internal arcing occurred; and calculating a distance d that separates the place at which the internal arc is formed from the position of the pressure sensor using the equation d=V/&#x394;t in which V is the speed of sound in the gas.

Method of locating internal arcing in a gas-insulated line and an associated device

A signal processor device comprising: first input means intended to be connected, via a measurement sensor, to a high-voltage signal of an electrical installation; and processor means for analyzing the signal measured by said sensor; the device further comprising:

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Barberaz, France

Guillaume Granelli