System and method for signal modulation for panoramic partial discharge monitoring of transformer substation

Abstract

The invention discloses a system and a method for signal modulation for panoramic partial discharge monitoring of a transformer substation. The system comprises an amplifying unit, a conversion unit, a detection unit, a master control unit and a conversion circuit, wherein the amplifying unit is used for conducting gain adjustment on monitoring signals, the conversion unit is used for conducting power voltage conversion on signal data output by the amplifying unit, the detection unit is used for obtaining characteristic values of the signal data output by the conversion unit, the master control unit is used for controlling and processing the signal data output by the detection unit, the conversion circuit comprises a logarithmic converter and a detector, the logarithmic converter is used for converting radio-frequency signals into voltage signals, and the detector is used for processing signals output by the logarithmic converter. The system and the method have the advantages of being capable of monitoring partial discharge signals of all electrical devices in the transformer substation in real time, monitoring peak values, effective values and abnormities such as frequencies through obtaining of information of characteristic values, detecting electrical and mechanical faults timely and greatly expanding the application range of panoramic partial discharge monitoring of the transformer substation.

Description

Technical field [0001] The invention belongs to the field of electric power technology, and specifically relates to a signal modulation system and method for panoramic partial discharge monitoring of a substation, and further relates to a conversion circuit. Background technique [0002] The panoramic monitoring of substations can generally be divided into three levels in the logical structure: process level, bay level, and station control level. Among them, the process level is the combination of primary equipment and secondary equipment, and its main function is: power transmission and transformation The detection of characteristic parameters of the equipment, the online detection and statistics of status parameters, the execution of operation control and other tasks; the main function of the bay layer is: the summary of the real-time data information of the bay process layer, data processing, and implementation of protection and control of the primary equipment The main task o...

AI Technical Summary

Problems solved by technology

The existing technology has limited application capabilities for partial discharge signal monitoring of various electrical equipment in substations, especially the inability to obtain information on the effective value and peak value of partial discharge signals intuitively and in a wide range, so that it is impossible to realize comprehensive and effective monitoring of substations. Monitoring of Earth Panoramic Partial Discharge

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