US 2017/0336459 A1 · SYSTEM FOR ANALYZING AND LOCATING PARTIAL DISCHARGES

Abstract

A sensor detects partial discharges (PDs) in an electrical power system and generates a corresponding analog electrical signal. A data acquisition component receives the signal from the sensor and converts it to digitized zero span data for a series of uniformly spaced frequencies in a frequency spectrum of interest. A digital signal processing component receives the digitized zero span data, analyzes such data, and generates a corresponding phase resolved spectrum signal in three dimensional format including dimensions of amplitude, phase and frequency for each of the uniformly spaced frequencies. A display component receives the analyzed data stream from the processing component and actuates one or more displays from which characteristics of the PD can be identified, such as different types of PDs from different sources, and information on the location of a PD relative to the sensor.

Claims9

Dependent claims

A method for analyzing a partial discharge (PD) in an electrical system receiving electric power at a characteristic power frequency, which comprises:

(1) receiving an electrical PD signal from a sensor configured and positioned to sense a PD in an electrical system over a measured frequency range;
(2) converting the electrical PD signal to a digitized zero span data signal having digital zero span data for each of several frequencies in a frequency range of interest, said frequency range being within the measured frequency range;
and
(3) sorting the digital zero span data so as to obtain a phase resolved spectrum signal in three dimensional format including dimensions of amplitude, phase and frequency for each of the several frequencies in the frequency range of interest.

1 more element

Dependencies are inferred from the claim text.

System for analyzing and locating partial discharges

Life of this patent

System for analyzing and locating partial discharges

Life of this patent

Abstract

Claims9