PARTIAL DISCHARGE DETECTION SYSTEM

摘要

A partial discharge detection system for detecting partial discharge events in an electrical component includes a transducer configured to receive a signal from the electrical component generated due to an occurrence of a partial discharge in the electrical component and responsively provide a transducer output signal to a signal processing chain A signal processing chain comprises one or more of the following. A filter coupled to the transducer filters the transducer output signal and responsively generating a filtered output. An amplifier coupled to the filter amplifies the filtered output and responsively provide an amplified output. A detector converts the amplified output to a detected baseband signal. A filter removes elements of the baseband signal that are not characteristic of partial discharge and outputs a filtered baseband output. A peak hold system matches the time scale of partial discharge events to the timescale of an analog to digital conversion process, resulting in a sampled, filtered, baseband signal. A digital signal processor performs a Discrete Fourier Transform (DFT) on the filtered baseband output and responsively generates a plurality of coefficients which correspond to a plurality of different modulation frequencies of the sampled, filtered, baseband signal. A controller identifies an occurrence of a partial discharge in the electrical component based upon the plurality of coefficients.

主权项

1. A partial discharge detection system for detecting a partial discharge in an electrical component, comprising:
a transducer configured to receive a signal from the electrical component generated due to an occurrence of a partial discharge in the electrical component and responsively provide a transducer output signal; a signal processing chain providing a filtered baseband output representative of the transducer output signal; a digital signal processor configured to perform a Discrete Fourier Transform on the filtered baseband output and responsively generate a plurality of coefficients which correspond to a plurality of different frequencies; and a controller configured to identify an occurrence of a partial discharge in the electrical component based upon the plurality of coefficients.