Transformer vibration noise source positioning system and method

A vibration noise and transformer technology, applied in the field of transformer vibration and noise source positioning system, can solve the problems of not considering low-frequency noise, difficulty in decoupling of sub-structure noise transmission, complex transformer structure, etc., and achieve the effect of easy judgment

Inactive Publication Date: 2018-11-06
ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
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  • Application Information

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Problems solved by technology

However, this method is only good at identifying high-frequency noise sources, and does not consider low-frequency noise
In addition, due to the complex structure of the transformer, the vibration noise is transmitted to the sensor through solids, liquids, and gases, the transfer path function is complex, and the decoupling of substructure noise transfer is difficult

Method used

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  • Transformer vibration noise source positioning system and method
  • Transformer vibration noise source positioning system and method
  • Transformer vibration noise source positioning system and method

Examples

Experimental program
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Effect test

Embodiment 1

[0051] In Embodiment 1, a transformer vibration and noise source location method adopts the following steps:

[0052] (1) Set the input measurement parameters and analysis parameters on the computer, select the beamforming algorithm and the near-field acoustic holography algorithm, and input the sampling interval and the distance between the spiral array and the transformer;

[0053] (2) Start the traction motor, the spiral array sensor moves on the guide rail at a constant speed, and collects the vibration noise of the transformer around the transformer; during the movement of the spiral array sensor, the spiral array sensor continuously collects sound pressure signals, and the optical camera captures real-time images of the transformer;

[0054] (3) The signal processor divides the collected sound pressure signals into the frequency domain, and divides them into low-frequency signals less than 350HZ and high-frequency signals greater than 350HZ;

[0055] (4) Use the beamform...

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Abstract

The invention discloses a transformer vibration noise source positioning system and method, and relates to a vibration noise source positioning method. The transformer vibration noise source positioning system includes a spiral array sensor, a guide rail, a signal processor, a computer and a traction motor, wherein the spiral array sensor utilizes a wave beam shaping algorithm and a near field acoustical holography algorithm to identify the transformer vibration noise source, and at the same time an optical camera shoots the real-time images of a transformer; a classical transfer function database of each voltage class transformer is arranged in a path transfer analysis module, and the path transfer analysis module also includes a crosstalk elimination module, and can solve coupling of thetransfer path; and the final result is stored in a computer in a data form and an ultrasonogram mode. The transformer vibration noise source positioning system and method can be applied to a transformer in each voltage class and each operation condition.

Description

technical field [0001] The invention and a method for locating a vibration and noise source, in particular, relate to a system and a method for locating a vibration and noise source of a transformer. Background technique [0002] Transformer is one of the most important equipment in the power system. It is expensive but has a large role and involves a wide range of areas. As a large-scale power equipment, once a fault occurs, its maintenance cycle is long and difficult, which consumes a lot of manpower and material resources, and has a serious impact on the safe and stable operation of the power system. Transformers are bulky, complex in structure, and have a wide spectrum of vibration and noise. Monitoring the vibration and noise of transformers is helpful for early detection of transformer faults. [0003] In the prior art, "Noise Source Identification Method Using Vibration Velocity Measurement and Local Near-field Holography" (Patent No. 201210157595.2) uses near-field ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H17/00
CPCG01H17/00
Inventor 黎大健余长厅陈梁远张玉波张磊赵坚颜海俊贺德华
Owner ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
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