A test system and test method for direct injection into controllable pulse source partial discharge instrument

Abstract

A test system and test method for directly injecting a controllable pulse source partial discharge instrument, comprising a controllable pulse source (1), a shielded antenna (2), and a test partial discharge instrument (3) sequentially connected end to end through a wire (5) , digital oscilloscope (4), protective grounding (6), zero grounding (7); the controllable pulse source is used to generate various required types of pulses; the shielded antenna is used to shield the magnetic field generated by the current so as not to affect the The normal operation of other components; the partial discharge instrument under test is used to detect partial discharge signals; the digital oscilloscope is used to collect standard pulse signals; the wire is used to connect various components of the test system; The charge is released through the ground to protect the components; the zero ground is used to ground the zero in the local instrument test circuit system. The invention has the advantages of stable output pulse, adjustable pulse parameters, strong anti-interference, simple and reliable realization principle, and the like.

Description

technical field [0001] The invention relates to the technical field of partial discharge diagnosis of power equipment, in particular to a test system and a test method for direct injection into a controllable pulse source partial discharge instrument. Background technique [0002] Partial discharge of power equipment is the main cause of insulation degradation, and it is also the main symptom and manifestation of insulation degradation. Therefore, the detection of partial discharge can more sensitively reflect the early failure of the equipment, and provide a basis for effective preventive measures, which is of great significance to the safe and stable operation of electric high-voltage equipment. [0003] The partial discharge signal level is an indispensable means to measure the insulation status of electrical equipment. However, for different equipment under test, the same discharge amount will show great differences in the measurement results shown in the partial dischar...

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Problems solved by technology

[0004] At present, there are many partial discharge instruments at home and abroad, but their performance and reliability often cannot meet the requirements of partial discharge testing.

At present, there are many methods for detecting partial discharge instruments, such as pulse current method, ultrasonic wave, ultra-high frequency method, etc., but each method does not have a complete means and system for instrument testing

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