Method for judging main low-frequency vibration noise source of pumped storage power station ground

A pumped storage power station, low-frequency vibration technology, applied in the direction of measuring ultrasonic/sonic/infrasonic waves, measuring devices, instruments, etc., can solve problems such as difficult to realize, bulky units and flow channels, etc., and achieve easy realization and reliable judgment results Effect

Inactive Publication Date: 2014-10-01
POWERCHINA ZHONGNAN ENG
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Benefits of technology

The technical effect of this patented inventor's new method overcomes difficulties associated with observation during excavations where there are many small loud noises that may be difficult or expensive to see directly from inside. This allows researchers to make accurate calculations based on data collected by analyzing these sounds without having direct access outside their own devices.

Problems solved by technology

This patented technical problem addressed in this patents relates to detecting noise from an electricity system during normal operations without requiring expensive equipment such as a sound levels gauge.

Method used

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  • Method for judging main low-frequency vibration noise source of pumped storage power station ground
  • Method for judging main low-frequency vibration noise source of pumped storage power station ground
  • Method for judging main low-frequency vibration noise source of pumped storage power station ground

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Embodiment Construction

[0018] Method of the present invention mainly comprises following 2 steps:

[0019] The first step is to measure the spectral characteristics of the possible noise source (low frequency characteristics refer to the frequency band below 500Hz exceeding the standard; intermediate frequency characteristics refer to the frequency band above 500Hz exceeding the standard; high frequency characteristics refer to the frequency band above 500Hz exceeding the standard; The frequency band exceeds the standard. Exceeding the standard refers to the result of the peak sound pressure level difference corresponding to the peak frequency corresponding to the part of the noise octave band sound pressure level measured by the corresponding measuring point that needs to be judged when it is running or stopping. greater than 5dB. The sound pressure level limit is confirmed according to the relevant national standards; the possible noise sources of the pumped storage power station include units, flo...

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Abstract

The invention discloses a method for judging a main low-frequency vibration noise source of a pumped storage power station ground. Considering basic characteristics of noise of a pumped storage power station and on the basis of analyzing a possible noise source, the background values and the noise values of the sound level A before and after unit operation and the background value and the noise value of an octave band sound pressure level are measured in an underground power house, emphasis is given to the analysis of the spectral characteristics, the background values and the noise values before and after unit operation are measured inside and outside a typical peak resident house and the field ground in a splattering mode, after the spectral characteristics of the background values and the noise values are fully compared, the noise 1/3 octave vibration acceleration level is measured, the attenuation law of noise vibration spreading and the correlation degree of possible noise sources are analyzed, and the judgment about whether the possible noise sources are main noise sources is made finally. The method solves the problem that in a traditional method, the large noise source deeply buried in an underground cave is hard to actually observe.

Description

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Application Information

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Owner POWERCHINA ZHONGNAN ENG
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