Method and device for improved detection and analysis of partial discharge activity in and around high voltage electrical equipment

摘要

Apparatus for processing broadband impulses signals of low repetition rate includes a tuner for receiving broadband impulsive signals of low repetition rate and providing an output signal characteristic of the amplitude and spectral content of the received input signal. Resolution bandwidth filters coupled to the tuner output each have a different bandwidth that determines the measurement resolution and influences the sensitivity and transient response to low repetition rate impulsive signals. At least one radio frequency switch selects a resolution bandwidth filter for coupling to and associated one of at least a peak detector, an average detector and an envelope generator. A gate generator coupled to the peak detector, the average detector and the envelope generator furnishes a gating signal to each to provide a peak signal, an average signal and an envelope signal respectively during a selected gating interval. A microprocessor is coupled to the peak detector and the average detector.

主权项

1. Apparatus for the processing broadband impulsive signals of low repetition rate comprising,
a tuner constructed and arranged to receive broadband impulsive signals of low repetition rate and provide an output signal characteristic of the amplitude and spectral content of the received input signal, a plurality of resolution bandwidth filters coupled to the tuner output each having a different bandwidth that determines the measurement resolution of the device and influences the sensitivity and transient response to low repetition rate impulsive signals, at least one radio frequency switch for selecting a resolution bandwidth filter for coupling to an associated one of at least a peak detector, an average detector and an envelope generator, a gate generator coupled to the peak detector, the average detector and the envelope generator constructed and arranged to furnish a gating signal to the peak detector, the average detector and the envelope generator that enables the peak detector, the average detector and the envelope generator to provide a peak signal, an average signal and an envelope signal respectively during a selected gating interval, a microprocessor coupled to the peak detector and the average detector constructed and arranged to process the outputs of the peak detector and the average detector and furnish frequency control signals to the tuner and gate control signals to the gate generator.