Method for detecting post insulator cracks based on vibration acoustics

A post insulator and detection method technology, which is applied in the direction of using sound waves/ultrasonic waves/infrasonic waves to analyze solids, etc., can solve problems such as power grid outages, national economic losses, and failure to find equipment insulation defects, etc., to achieve less investment, reduce maintenance times, and reduce The effect of training costs

Active Publication Date: 2011-06-15
HEILONGJIANG ELECTRIC POWER RES INST +1
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Problems solved by technology

However, because the preventive test voltage is far lower than the actual operating voltage, it is often impossib

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  • Method for detecting post insulator cracks based on vibration acoustics
  • Method for detecting post insulator cracks based on vibration acoustics
  • Method for detecting post insulator cracks based on vibration acoustics

Examples

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Example Embodiment

[0034] For the pillar insulator (1) to be tested, under the control of the sonic emission / recording / control unit (2), the sonic emission contact (3) is excited to emit a certain frequency of sound waves from the pillar insulator (1) to be tested, so that The pillar insulator (1) to be tested is forced to vibrate, and then the response acoustic wave receiving contact (5) receives the continuous sound wave of forced vibration emitted by the pillar insulator (1) to be tested, and the sound wave emission / recording / control unit ( 2) Make a record, and then the sonic emission / recording / control unit (2) transmits the data to the computer (5), forms the acoustic spectrum in the computer, and enters the pre-established post insulator internal crack discrimination function to obtain the internal crack of the post insulator Judgment: such as figure 2 It is the evaluation chart of the vibration power spectrum density of the pillar insulation in good condition; image 3 It is the evaluation...

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Abstract

The invention provides a method for detecting post insulator cracks based on vibration acoustics, which belongs to the field of electric transmission and in particular relates to a method for detecting post insulator cracks based on vibration acoustics. The method comprises the following steps of: (1) exciting post insulators to be detected one by one with acoustic waves in a frequency spectrum range of 1000-10000Hz and detecting the forced vibration inherent frequency of the insulators; and (2) inputting the detection results of the continuous forced vibration acoustic wave frequency spectrum of the detected post insulators into post insulator internal crack judgment functions previously established to judge the internal cracks of the post insulators. The method can carry out site live line monitoring on the post insulators. During detection, as long as continuous acoustic wave collection is carried out on the post insulators once, the internal cracks of the post insulators can be detected respectively through various judgment functions previously established.

Description

technical field [0001] The invention belongs to the field of power transmission, and in particular relates to a detection method for detecting cracks of post insulators based on vibroacoustics. Background technique [0002] The insulation state of power equipment is very important to the safe operation of the power system. For a long time, the power system has used the traditional periodic test method (called preventive test) to detect the insulation of high-voltage equipment. However, since the preventive test voltage is far lower than the actual operating voltage, it is often impossible to find equipment insulation defects; and regular power grid outages will cause losses to the national economy. Since the 1980s, a new monitoring technology has been developed on the basis of live measurement technology at home and abroad-------on-line detection and diagnosis technology of electrical equipment insulation. It can measure the insulation parameters of the monitored equipment ...

Claims

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Application Information

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IPC IPC(8): G01N29/12
Inventor 池永斌孙国强宋朝晖
Owner HEILONGJIANG ELECTRIC POWER RES INST
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