Method for detecting arc faults based on time-frequency characteristics of high-frequency current component
An arc fault, high-frequency component technology, applied in voltage/current isolation, measurement using digital measurement technology, spectrum analysis/Fourier analysis, etc. The effect of strong interference ability, reduction of misoperation rate, and wide linearity range
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[0025] Specific implementation plan
[0026] The present invention will be further described in detail below in conjunction with the drawings.
[0027] See figure 1 , The overall structure of the system hardware of the present invention includes a self-integrating Rogowski coil, signal conditioning circuit (high frequency), A / D conversion circuit, trigger detection circuit, power frequency current transformer, signal conditioning circuit (power frequency), zero-crossing comparison circuit , Data acquisition control circuit, data storage module and data processing module.
[0028] The high-frequency signal output by the Rogowski coil is processed by the signal conditioning circuit (high frequency) and the trigger detection circuit to generate a pre-trigger signal, which is sent to the data acquisition control circuit to start high-frequency signal acquisition; in the control of the data acquisition control module Under the A / D conversion circuit, the conditioned signal is converted i...
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