Partial discharge automatic testing device

Abstract

The invention relates to a partial discharge automatic testing device, which comprises a power supply module, a first test loop and a second test loop. The first test loop comprises a first measurement impedor and to-be-tested equipment. The second test loop comprises a coupling capacitor and a second measurement impedor. The device further comprises a measurement and control module and a man-machine interaction module. The measurement and control module and the man-machine interaction module are electrically connected. A voltage signal between a first connection point and a second connection point in the first test loop and the second test loop is outputted to the measurement and control module, so that the partial discharge quantity can be calculated. The onset voltage, the onset frequency, the increased amplitude of voltage each time, and other parameters of a full-digital no-partial-discharge high-voltage power supply are preset by the man-machine interaction module. The automatic testing operation is conducted through clicking a Start button. Therefore, the automatic testing function for an entire system is realized.

Description

technical field [0001] The invention relates to the technical field of partial discharge detection of electrical equipment; in particular, it relates to a partial discharge automatic test device for detecting the quality and performance of electrical insulation. Background technique [0002] As we all know, the insulating components of electrical equipment are affected by various factors such as electricity, heat, machinery, and adverse environments during operation, and the insulation performance will gradually deteriorate, resulting in defects in the insulation of the equipment and causing equipment failure. Insulation detection and diagnosis technology can detect faults in the early stage of electrical equipment insulation components; especially partial discharge testing technology is widely used as a non-destructive testing technology. An accurate and convenient partial discharge test system is very important to ensure the quality of high-voltage electrical appliances an...

AI Technical Summary

Problems solved by technology

[0003] further combined figure 2 , when the partial discharge test system in the prior art tests the insulation performance of electrical equipment, although the interference signal in the frequency band different from the detected signal is filtered out by the function of the filter in the detection circuit, there is still the same frequency band as the detected signal The interference current I F2

The electrical equipment under test is equivalent to Cx in the test circuit, and the measured impedance is figure 2 Zm in Zm, the actual measured partial discharge current I=V / Zm=I F2 +Ix, and all we need is Ix, the I in the measured current I F2 Is the interference signal, practice shows that the above interference signal I F2 The existence of the test results has a relatively large impact, resulting in a low signal-to-noise ratio of the signal, and the test accuracy of the entire test system is not high

[0004] In addition, the testers in the current prior art cannot realize automatic measurement, the operation efficiency is low, error-prone, and functions such as automatic report generation and data analysis cannot be realized

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