Locating of partial-discharge-generating faults
AssigneePrysmian S.p.A.
InventorsLluis-Ramon Sales Casals, Stefano Franchi Bononi, Roberto Candela, Manuel Lopez Gonzalez
Life of this patent
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Abstract
A method of locating incipient faults that generate partial discharges in an AC power distribution system includes detecting at least one spike in a PD pattern generated by such system; getting the voltage wave of the AC power in the system; detecting a phase of such spike with respect to the voltage of the AC power; and locating an incipient fault where such phase is below a predetermined threshold. An apparatus includes at least one sensor of electrical pulses, means for getting a synchronism signal with a power supply of the power distribution system, and modules adapted to carry out the method.
Claims12
A method of locating incipient faults that generate partial discharges in an AC power distribution system, comprising:
- collecting a partial discharge pattern at a position of the AC power distribution system through an electric apparatus, the electric apparatus comprising at least one sensor of electrical pulses;
- detecting at least one spike in the partial discharge pattern generated by such system, the at least one spike including a concentration of electrical pulses;
- getting a voltage wave of AC power in the system;
- detecting a phase of the spike with respect to voltage of the AC power;
- locating an incipient fault at the position of the AC power distribution system if the detected phase of the spike with respect to voltage of the AC power is below a predetermined threshold;
- and
- inspecting, repairing, or substituting only a portion of the AC power distribution system at the position when the detected phase of the spike is below the predetermined threshold.
Dependencies are inferred from the claim text.