Partial discharge electro-acoustic signals synchronous monitoring device for CPLD (complex programmable logic device)-based transformer

Abstract

The invention discloses a partial discharge electro-acoustic signals synchronous monitoring device for a CPLD (complex programmable logic device)-based transformer. The device comprises a CPLD control module, as well as a sensor module, a signal conditioning module, a four-channel synchronous sampling ADC (analog to digital converter), a deserializer module, an FIFO (first in first out) storer, a PCI (peripheral component interconnect) bus interface circuit and a host computer which are respectively connected with the CPLD control module. After the device is used, the signal conditioning, the synchronous A / D (analog to digital) sampling and the data placement are carried out on a plurality of electro-acoustic signals generated by the partial discharge of the transformer by the CPLD control signal conditioning module, the four-channel synchronous sampling ADC and the FIFO storer, and the electro-acoustic signals are uploaded to the host computer through a PCI bus to be comprehensively analyzed and processed, so that the wideband electro-acoustic signals can be synchronously monitored on the line, the integrated partial discharge signal characteristic can be timely obtained, the monitoring veracity can be improved, and the device is high in reliability, high in anti-jamming capability, and stable to run.

Description

technical field [0001] The invention belongs to monitoring equipment for synchronous sampling of electro-acoustic signals generated by partial discharge of transformers, in particular to a monitoring device based on CPLD for synchronous sampling of electro-acoustic signals of transformer partial discharges. Background technique [0002] Real-time online monitoring of the partial discharge signal of the transformer can detect the insulation aging of the transformer and predict the development trend of the fault in time, so as to prevent the occurrence of malignant accidents; therefore, some online monitoring devices have been developed, such as the Chinese patent application number 201210279848.3 Disclosed is a dry-type transformer partial discharge on-line monitoring and its positioning method. The first ultrasonic sensor, the second ultrasonic sensor, the third ultrasonic sensor, and the fourth ultrasonic sensor respectively collect the ultrasonic signals in the partial disc...

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Problems solved by technology

However, according to the literature consulted by the inventor, there is no relevant literature report on the application of CPLD in the on-line monitoring equipment for partial discharge signals of transformers.

Therefore, the inventor feels that it is urgently needed in the market to develop a device that how to apply CPLD to the on-line monitoring equipment for partial discharge signals of transformers, so as to solve the problems of low accuracy and low reliability in existing equipment.

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