Capacitive high-voltage equipment insulation aging diagnostic test system and working method thereof

Abstract

The invention discloses a capacitive high-voltage equipment insulation aging diagnostic test system and a working method thereof. Double-frequency time-varying signals are used in the system for carrying out an overlaying impact test, two independent DDS signal generators, a power amplifier with white noise control, an amplitude overlaying unit and a controllable inductive load which is in output connection with the amplitude overlaying unit in series or in parallel form a composite aliasing waveform output loop, a set of information processing analysis method is combined, and insulation aging of tested high-voltage equipment is subjected to test diagnosis. Compared with the prior art, the insulation aging diagnosis test can be completed by exerting a test signal which is lower than a nominal voltage on the tested high-voltage equipment, insulation damage cannot be caused on the high-voltage equipment, the test can be carried out at any time, on-site testing is convenient, testing efficiency is high, compared with an existing diagnosis test signal which is single in waveform, the overlaying impact test signals can obtain abundant testing parameters, and potential fault of the high-voltage equipment can be easily found.

Description

technical field [0001] The invention relates to a high-voltage equipment insulation aging diagnostic test system, in particular to a capacitive high-voltage equipment insulation aging diagnostic test system capable of performing diagnostic tests without outputting the rated voltage of the high-voltage equipment and a working method thereof. Background technique [0002] Traditional high-voltage equipment insulation test methods, including power frequency test and impact test, usually apply a voltage of 1-3 times the rated voltage value to the high-voltage equipment under test, and then study the output current value or impedance value under this voltage. This high-voltage test method mainly has the following defects: (1) Since the test voltage is as high as tens of thousands of volts or even millions of volts, the volume of the test device is large, and the test requires huge manpower and material resources, which also makes the test efficiency not high. There is also insula...

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Problems solved by technology

This high-voltage test method mainly has the following defects: (1) Since the test voltage is as high as tens of thousands of volts or even millions of volts, the volume of the test device is large, and the test requires huge manpower and material resources, which also makes the test efficiency not high. There is still insulation damage to the tested high-voltage equipment

(2) The over-high voltage test is mainly carried out in the standard test base. At the same time, there are many environmental and personal safety factors that need to be considered in the high-voltage equipment test operation site. Therefore, high-voltage tests are generally arranged in a targeted manner, and it is impossible to conduct high-voltage tests The equipment undergoes frequent high-voltage tests, and frequent withstand voltage tests on large areas will also lead to shortened life of high-voltage equipment or insulation damage

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