Full-digitalization multi-channel real-time synchronous partial discharge detector

Abstract

The invention belongs to the field of detecting and measuring instruments and discloses a full-digitalization multi-channel real-time synchronous partial discharge detector. The detector comprises signal input units of eight channels. The signal output end of each signal input unit is connected with the signal input end of an A / D conversion circuit through a coarse tuning circuit, a prefixed amplifying circuit, a fine tuning circuit, a low-pass and high-pass filtering circuit and a main amplifying circuit. Each A / D conversion circuit is connected with the signal input end of an FPGA circuit, the FPGA circuit is in data communication with an upper computer, eight cache units corresponding to the channels are connected to the FPGA circuit, the output end of each of the main amplifying circuits on the channels is correspondingly connected with one A / D conversion circuit, the signal output end of each A / D conversion circuit is correspondingly connected with the signal input end of an optical coupling isolation circuit, and the signal output end of each optical coupling isolation circuit is connected with the signal input end of the FPGA circuit. The full-digitalization multi-channel real-time synchronous partial discharge detector improves the capacity of resisting disturbance in the signal transmission process, and can be used in a partial discharge test.

Description

technical field [0001] The invention relates to a detection instrument, in particular to a partial discharge detection instrument. Background technique [0002] With the gradual improvement and standardization of insulation technology requirements for more and more industries such as motors, transformers, and wires, the scope of use of partial discharge detectors is also wider, and users have higher requirements for the performance of partial discharge detectors. Some aspects of domestic partial discharge detectors need to be improved urgently, as follows: [0003] 1) The capacity of the partial discharge signal input channel is not enough. Now the maximum can only reach 4 channels. Although some are multi-channel, due to the time-sharing A / D acquisition of analog signals, the multi-channel partial discharge signal acquisition does not achieve real-time synchronization, but it can only be displayed in time-sharing, not Multi-channel in the true sense cannot meet the requir...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an all-digital multi-channel real-time synchronous partial discharge detector, which solves the problem that the multi-channel in the prior art cannot be displayed synchronously, and improves the anti-interference ability of the partial discharge detector

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