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Transformer station noise reduction method

A technology for substation and noise reduction, applied in the field of noise reduction of substations, can solve the problems of insignificant comprehensive noise reduction effect, inability to meet the noise reduction requirements and service requirements of substations, failure and other problems, and achieve the effect of excellent use reliability.

Active Publication Date: 2017-01-04
STATE GRID ZHEJIANG ELECTRIC POWER +3
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  • Abstract
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Problems solved by technology

[0006] Commonly used rock wool sound-absorbing materials only have obvious sound-absorbing effects on high-frequency noise, and quickly fail after being exposed to moisture, which cannot meet the noise reduction requirements and service requirements of substations
Although materials such as aluminum foam and sprayed fiber can control low-frequency noise, the cost is too high, and the sound absorption peak curve cannot cover the frequency of high-order harmonic noise, so the comprehensive noise reduction effect is not obvious

Method used

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Examples

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Embodiment 1

[0040] The invention provides a noise control design method for a newly-built substation. The method is based on general design, referring to station B with the same scheme as station A, and pre-evaluating the noise emission status of station A through the investigation of station B, so as to grasp Spectrum and intensity of the sound source at station A; aiming at the expected control target of noise, new sound-absorbing materials with specific frequency spectrum and advanced simulation technology are adopted, and new sound-absorbing materials are combined with other auxiliary noise reduction measures to control substation noise. The specific program steps are:

[0041] (1) Investigation and evaluation of substation noise:

[0042] Use the sound level meter to measure and analyze the near-field noise of the main sound source equipment in station B and the station boundary noise of the substation, and analyze the noise spectrum characteristics in combination with relevant liter...

Embodiment 2

[0051] 1. Measurement and analysis of substation noise:

[0052] This project takes station B as an analogy object, and predicts noise emission for station A, so as to grasp the frequency spectrum and intensity of the sound source at station A. The position of the main variable measuring point is as figure 1 Shown (1#, 4# without main transformer). When measuring, the measuring point is 1.5 meters above the ground and 1.5 meters away from the main transformer oil tank shell. figure 2 It is each measuring point spectrogram of main transformer provided by the present invention; Wherein: (a) is the spectrogram of 2# main transformer measuring point 1 and 2; (b) is the spectrogram of 2# main transformer measuring point 3 and 4; ( c) is the spectrum diagram of measuring points 5 and 6 of the 3# main transformer; (d) is the spectrum diagram of measuring points 7 and 8 of the 3# main transformer.

[0053] It can be seen from the noise spectrum that the main noise of this station ...

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Abstract

The invention relates to a transformer station noise reduction method; the method comprises the following steps: handling transformer station main sound source equipment and structure layout according to transformer station construction civil engineering drawings and equipment lists; selecting a reference station; using field measure and noise mapping technology to predict noise frequency spectrum characteristics and propagation influence rules of a newly built transformer station; carrying out type selecting and application designs for low frequency noise reduction sound absorbing materials, structure and devices; combining finite element simulation analysis, considering sound field, flow field and heat effect multi-field coupling, and carrying out scheme simulation optimization design while satisfying noise reduction, heat radiation and air channel optimization factors, thus reducing station border noise emission from the sound absorption, sound insulation and noise abatement aspects. When the construction is finished, the measured station border noise is 43.61dB, thus satisfying I type sound environment function zone standards; the novel method can effectively control station border noise emission, thus providing references for designs of same type transformer stations under increasingly strict environmental protection requirement situations.

Description

technical field [0001] The invention relates to a noise control technology and specifically designs a noise reduction method for a substation. Background technique [0002] Noise sources in substations include main transformers, grounding transformers, capacitors, busbars, line gates, switch gates and other sound source equipment. Among them, the main transformer is the main noise source of the substation, and its noise level is positively correlated with the power load. Under daily operating conditions, the near-field noise level of the main transformer can reach above 65-67dB(A). After calculation, it is estimated that the near-field instantaneous noise level can reach 69-72dB(A) under the peak power consumption operating condition. . Moreover, the vibration of the iron core of the main transformer will also cause some floor resonance in the main transformer room, and generate low-frequency secondary structure noise. The equipment noise of the main transformer and the n...

Claims

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Application Information

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IPC IPC(8): E04H5/04E04B1/82F24F13/24
Inventor 田一聂京凯樊超王广克朱全军肖伟民李靖傅剑鸣孔晓峰何明锋王斌
Owner STATE GRID ZHEJIANG ELECTRIC POWER
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