Converter transformer fault detection device based on LABVIEW and voice frequency analysis

Abstract

The invention relates to a converter transformer fault detection device based on LABVIEW and voice frequency analysis. The converter transformer fault detection device is installed on a converter transformer and comprises a cable, a sensor, a signal conditioning circuit, an optical fiber transceiver, an industrial control machine and a server, wherein the sensor is installed on a casing of the converter transformer, the output end is connected with the input end of the signal conditioning circuit, the output end of the signal conditioning circuit is connected with the input end of the optical fiber transceiver, and the output end of the optical fiber transceiver is connected with the industrial control machine through the cable, the industrial control machine is connected with the converter transformer through the cable and is in both-way connection with the server through a local area network. Compared with the prior art, the converter transformer fault detection device has the advantages of being reliable, reasonable, high in device routine inspection working efficiency and detection quality and the like.

Description

technical field [0001] The invention relates to a fault detection device, in particular to a converter transformer fault detection device based on LABVIEW and audio analysis. Background technique [0002] The converter transformer is the key equipment in the high-voltage direct current transmission project. The converter transformer is usually equipped with temperature sensors, gas relays, oil flow relays, pressure relief valves and other converter transformer components. The first three are also connected to other equipment. They guarantee the safe and reliable operation of the converter to a certain extent. But they all work after the internal faults of the converter develop to a certain extent or even to a serious extent. In addition, such as: steady-state ratio differential protection, power frequency variation ratio differential protection, backup protection, including over-current, zero-sequence over-current, over-voltage, zero-sequence over-voltage, saturation protec...

AI Technical Summary

Problems solved by technology

[0004] Chinese patent 200720058805.7 discloses a real-time online fault alarm for industrial equipment based on audio monitoring. This invention includes microphones, amplifiers, transmitters installed in the monitored field equipment area, receivers installed in the monitoring room, and digital-to-analog converters. , single-chip microcomputer, and light-emitting diodes, there are disadvantages such as wireless transmission will cause signal interference in the electromagnetic environment, and the processing system for audio analysis is not introduced in detail.

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