A kind of active noise reduction control method for substation
A control method and active noise reduction technology, applied in the direction of active noise control, musical instruments, sounding equipment, etc., can solve the problem that the decibel value of the substation cannot be effectively reduced, and achieve the effect of improving the effect and improving the noise suppression effect.
Active Publication Date: 2022-08-02
STATE GRID HEBEI ELECTRIC POWER RES INST +2
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[0004] The purpose of the present invention is to provide a substation active noise reduction control method, aiming to solve the problem that the decibel value in the substation cannot be effectively reduced
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[0044] As a specific embodiment of the active noise reduction control method for a substation provided by the present invention, recording the ambient sound in the substation and generating the environmental information includes:
[0045] When the decibel value in the substation is higher than the preset standard, the calibration microphone is activated, and the ambient sound is recorded by the calibration microphone.
[0046] When the decibel value in the substation is higher than the preset standard, it indicates that the noise reduction emitted by the first speaker and the second speaker has not suppressed the noise to a reasonable level. For this reason, the calibration microphone needs to be activated, and the calibration microphone can also record the sound. , and use a similar method to make appropriate adjustments to high-frequency noise reduction and low-mid frequency noise reduction.
[0047] As a specific embodiment of the active noise reduction control method for a...
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The invention provides an active noise reduction control method for a substation, which belongs to the technical field of noise suppression. The loudspeaker generates low-intermediate frequency noise reduction according to the low-intermediate frequency information; the high-frequency area in the noise information is phase-processed to obtain high-frequency information, and the second speaker emits high-frequency noise reduction according to the high-frequency information; records the ambient sound in the substation and generates the ambient After the environmental information is phase-processed, it is coupled with the high-frequency information and the low-IF information to adjust the low-IF noise reduction and the high-frequency noise reduction. In the active noise reduction control method for a substation provided by the present invention, the effect of noise suppression is improved by separately processing low, intermediate frequency and high frequency, and at the same time, the re-detection of the ambient sound finally reduces the decibel value of the noise in the entire substation.
Description
technical field [0001] The invention belongs to the technical field of noise suppression, and more particularly, relates to an active noise reduction control method for a substation. Background technique [0002] In recent years, with the rapid development of power grid construction and the increasing scale of cities, compared with 110kV and 220kV substations, 500kV substations have the characteristics of more types of noise sources, greater noise source intensity and more complex noise impact, which also leads to its impact on The impact of the environment outside the station is also more obvious. [0003] There are many active noise reduction systems in the prior art. These systems also collect noise through feedforward microphones and feedback microphones, and generate noise reduction with opposite phases. However, due to the daily use of substations, noise is mostly concentrated in In the high-frequency region, the high-frequency region has the most obvious impact on th...
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IPC IPC(8): G10K11/178
CPCG10K11/17813G10K11/17857G10K11/1785G10K2210/111
Inventor 陈秋车凯郁金星陈崇明侯海萍牛向楠宫云茜
Owner STATE GRID HEBEI ELECTRIC POWER RES INST