阅读说明：本技术 一种基于层次分析法对配电房进行主动降噪的方法及装置 (Method and device for actively reducing noise of power distribution room based on analytic hierarchy process ) 是由 罗阳 梁汝波 区振华 陆新永 陈志成 何智祥 陈卓昀 胡梓新 杨薇 刘振杰 龙希 于 2020-07-10 设计创作，主要内容包括：本发明提供一种基于层次分析法对配电房进行主动降噪的方法及装置,其中方法包括以下步骤：分离初级声波,得到高频声波和低频声波；分别计算对全波、所述高频声波和所述低频声波进行主动降噪的综合评分,并计算不进行降噪的综合评分；根据所述综合评分的结果,输出相应的次级声波。其中装置包括初级声波转换模块、综合评分模块和次级声波输出模块；所述初级声波转换模块与所述综合评分模块连接,所述综合评分模块还与所述次级声波输出模块连接；所述综合评分模块内设置有所述层次分析算法。本发明用所述次级声波抵消所述初级声波实现主动降噪,以解决目前配电房降噪成本高、对设备散热不利的问题。(The invention provides a method and a device for actively reducing noise of a power distribution room based on an analytic hierarchy process, wherein the method comprises the following steps: separating the primary sound wave to obtain a high-frequency sound wave and a low-frequency sound wave; respectively calculating comprehensive scores for actively reducing noise of the full wave, the high-frequency sound wave and the low-frequency sound wave, and calculating comprehensive scores for not reducing noise; and outputting corresponding secondary sound waves according to the comprehensive grading result. The device comprises a primary sound wave conversion module, a comprehensive scoring module and a secondary sound wave output module; the primary sound wave conversion module is connected with the comprehensive scoring module, and the comprehensive scoring module is also connected with the secondary sound wave output module; the comprehensive grading module is internally provided with the hierarchical analysis algorithm. The active noise reduction is realized by using the secondary sound waves to offset the primary sound waves, so that the problems of high noise reduction cost and unfavorable heat dissipation of equipment in the conventional power distribution room are solved.)

1. A method for actively reducing noise of a power distribution room based on an analytic hierarchy process is characterized by comprising the following steps of:

s1, separating the primary sound wave to obtain high-frequency sound wave and low-frequency sound wave; the primary sound wave is noise sound wave in the power distribution room;

s2, respectively calculating comprehensive scores for actively reducing noise of the full wave, the high-frequency sound wave and the low-frequency sound wave, and calculating comprehensive scores for not reducing noise;

the comprehensive score is a comprehensive evaluation index of the noise of the power distribution room; a hierarchical analysis algorithm is adopted for calculating the comprehensive scores;

the full wave comprises the high frequency sound wave and the low frequency sound wave;

and S3, outputting corresponding secondary sound waves according to the comprehensive grading result, wherein the secondary sound waves are used for offsetting the primary sound waves.

2. The method for actively reducing noise of a power distribution room according to claim 1, wherein the hierarchical analysis algorithm in step S2 has a three-layer structure:

the first layer is the final result of the comprehensive score;

the second layer is evaluation indexes influencing the comprehensive score;

the third layer is an evaluation index which influences the evaluation index in the second layer;

the calculation equation of the comprehensive score is as follows:

S_i(j) a score representing the jth evaluation index of the ith layer; s_i-1(k) A score representing the kth evaluation index of the i-1 st layer; w is a_i-1(k) And K represents the weight of the K evaluation indexes of the i-1 layer, and the number of the j evaluation indexes of the ith layer and the associated evaluation indexes of the i-1 layer.

3. The method of claim 2, wherein the evaluation criteria of the second layer includes at least one of satisfaction, industry, and density of houses.

4. The method of actively reducing noise in a power distribution room of claim 3, wherein the evaluation metrics in the third layer that affect the satisfaction include environment, sound level, distance, and density of people streams.

5. The method of actively reducing noise in a power distribution room of claim 3, wherein the evaluation indicators in the third layer and affecting the industry include acoustic sensitivity and people flow density.

6. The method of actively reducing noise in a power distribution room of claim 3, wherein the evaluation metrics in the third floor that affect the density of the houses include traffic density and house spacing.

7. The method of claim 2, wherein the evaluation criteria of the second layer further comprises a cost of active noise reduction.

8. The method of actively reducing noise in a power distribution room of claim 7, wherein the evaluation metrics in the third layer that affect the cost include sound magnitude and complexity of the primary sound wave.

9. A noise reduction device applying the active noise reduction method for the power distribution room of claim 1 is characterized by comprising a primary sound wave conversion module, a comprehensive grading module and a secondary sound wave output module; the primary sound wave conversion module is connected with the comprehensive scoring module, and the comprehensive scoring module is also connected with the secondary sound wave output module;

the comprehensive grading module is internally provided with the hierarchical analysis algorithm.

10. The noise reduction device according to claim 9, further comprising an error sound wave receiving module, wherein the error sound wave receiving module is connected to the composite scoring module; the composite scoring module includes an adaptive algorithm controller.

Technical Field

The invention relates to the field of electric power engineering facilities, in particular to a method and a device for actively reducing noise of a power distribution room based on an analytic hierarchy process.

Background

In recent years, with the vigorous development of urban construction in China, the power distribution station is widely applied as a hub for electric energy transmission to support the major task of urban construction, so that people are closer to the power distribution station. People also suffer from the noise caused by the quality and reliability of the electric energy greatly improved by enjoying the power distribution station. In recent years, power grids have received a great deal of noise complaints, which has greatly increased concerns about the construction of power distribution rooms.

The noise generated by the transformer is the main part of the power distribution room noise. The main causes of noise generated by the transformer are: 1. the transformer coil vibrates due to the electric field force through the coupling of current and leakage flux, and noise is generated; 2. the rotation of the transformer fan and the vibration caused by the bus current and the generated magnetic flux leakage cause the vibration of the transformer shell, and noise is generated. 3. Under the condition of high magnetic density, the transformer generates excitation phenomenon and generates larger noise. These noises are composed of high-frequency noise and low-frequency noise together.

The existing noise reduction of the power distribution room is mainly considered from the aspect of passive noise reduction, and the measures adopted are as follows: 1. from the source, the design of the transformer is optimized, the damping treatment is carried out, and the noise is reduced by adopting a material with higher quality. This undoubtedly increases the cost of the transformer considerably, while producing little effect; 2. in view of transmission, sound-absorbing materials are adopted to increase damping and achieve the purpose of noise reduction, meanwhile, the materials are high in cost, but the materials are added to cause great influence on heat dissipation of a power distribution room, meanwhile, in order to dissipate heat, a place which cannot be covered by the noise reduction materials is necessary, and the noise reduction effect is not good.

The patent specification 202010013207.8 of the Chinese application discloses an active and passive comprehensive noise reduction system of distribution and transformation equipment, which is characterized in that noise absorption materials are coated on the walls of a transformer chamber and a reactor chamber, and a damping part is added on a base to reduce noise, so that the cost is still increased, and the heat dissipation of the equipment is influenced.

Disclosure of Invention

The invention aims to overcome at least one defect in the prior art, and provides a method and a device for actively reducing noise of a power distribution room based on an analytic hierarchy process, so as to solve the problems of high noise reduction cost and adverse effect on equipment heat dissipation at present, achieve the effects of reducing noise reduction cost and not influencing equipment heat dissipation, and improve the noise reduction effect.

In order to achieve the technical effects, the technical scheme of the invention is as follows:

in one aspect, the invention provides a method for actively reducing noise of a power distribution room based on an analytic hierarchy process, which comprises the following steps:

s1, separating the primary sound wave to obtain high-frequency sound wave and low-frequency sound wave; the primary sound wave is noise sound wave in the power distribution room;

s2, respectively calculating comprehensive scores for actively reducing noise of the full wave, the high-frequency sound wave and the low-frequency sound wave, and calculating comprehensive scores for not reducing noise;

the comprehensive score is a comprehensive evaluation index of the noise of the power distribution room; a hierarchical analysis algorithm is adopted for calculating the comprehensive scores;

the full wave comprises the high frequency sound wave and the low frequency sound wave;

and S3, outputting corresponding secondary sound waves according to the comprehensive grading result, wherein the secondary sound waves are used for offsetting the primary sound waves.

It should be noted that, in step S1, the noise in the power distribution room is separated into high frequency sound waves and low frequency sound waves; step S2, evaluating the noise-reduced effect of different modes, wherein the evaluation index is the comprehensive score after active noise reduction, and the comprehensive score is calculated by adopting an analytic hierarchy process which is a theory in operation research; the active noise reduction mode is divided into three modes, namely active noise reduction on high-frequency sound waves only, active noise reduction on low-frequency sound waves only and active noise reduction on full waves, wherein the noise reduction on the full waves is the noise reduction on the high-frequency sound waves and the low-frequency sound waves together; after respective comprehensive scores of active noise reduction calculation in different modes are calculated, step S3 selects an active noise reduction mode corresponding to an optimal comprehensive evaluation for noise reduction; in addition, if the comprehensive evaluation of noise reduction is not optimal, active noise reduction is not carried out; the noise reduction is realized by generating secondary sound waves to counteract the primary sound waves, and the secondary sound waves are sound waves with opposite phases of the primary sound waves required to be subjected to noise reduction in the selected active noise reduction mode.

The noise reduction method is adopted to reduce noise, and noise reduction can be realized without adding damping parts and coating noise reduction materials, so that the noise reduction cost is reduced, and the heat dissipation of equipment cannot be influenced by coating other materials; meanwhile, the method has multiple noise reduction modes, can respectively reduce noise aiming at high-frequency sound waves, low-frequency sound waves and full waves, can improve the noise reduction effect by more targeted implementation, and cannot cause poor noise reduction effect due to the fact that the inherent noise reduction frequency of the noise reduction part is not consistent with the frequency generated by noise.

Further, the hierarchical analysis algorithm in step S2 has a three-layer structure:

the first layer is the final result of the comprehensive score;

the second layer is evaluation indexes influencing the comprehensive score;

the third layer is an evaluation index which influences the evaluation index in the second layer;

the calculation equation of the comprehensive score is as follows:

S_i(j) a score representing the jth evaluation index of the ith layer; s_i-1(k) A score representing the kth evaluation index of the i-1 st layer; w is a_i-1(k) And K represents the weight of the K evaluation indexes of the i-1 layer, and the number of the j evaluation indexes of the ith layer and the associated evaluation indexes of the i-1 layer.

It should be noted that, in an actual situation, a worker may divide the hierarchical analysis algorithm into algorithms of other levels except for three levels, but the applied calculation equations are still the same and are not limited herein; according to the principle of a hierarchical analysis method, each layer is provided with a plurality of evaluation indexes, each evaluation index is provided with a plurality of related evaluation indexes in the next layer, and each evaluation index has corresponding weight to the related evaluation index of the previous layer.

Further, the evaluation index of the second layer comprises at least one of satisfaction, industry and house density.

Wherein, the satisfaction degree represents the satisfaction degree of people on the noise of the power distribution room; the industry represents the influence degree of noise on different industries, and the noise requirement of the production of some high-precision instruments is higher; the house density represents the degree to which the space of a room causes noise to affect a person.

Further, the evaluation indexes in the third layer and affecting the satisfaction include environment, sound size, distance, and density of people stream.

It should be noted that, the score is obtained by counting the influence of different sound sizes on people, and the score is lower when the influence is larger; for the influence of the distance, sound can be attenuated in transmission, the sound attenuation speeds of different frequencies are different, the power distribution room can be set to be 100 points when the distance of life of people cannot be influenced, scoring can be carried out according to the requirements of decision makers when the life of people can be influenced, and the smaller the distance is, the lower the scoring is; for the density of people flow, the density of the house and the flow of people passing through the power distribution room are graded, and the higher the density, the lower the grade; for the environment, the plants can play a role in attenuating the sound in sound transmission, and meanwhile, the influence degree of the noise can be greatly reduced by adopting sound insulation materials in some areas, so that the sound reduction degree is graded according to the field environment, and the better the environment is, the higher the grade is.

Further, the evaluation indicators in the third layer and affecting the industry include acoustic sensitivity and people stream density.

Further, the evaluation index in the third floor and affecting the house density includes a crowd density and a house pitch.

Further, the evaluation index of the second layer further includes cost of active noise reduction.

It should be noted that the cost represents the cost of using active denoising, and in order to reduce unnecessary starting and reduce the complexity of unnecessary active denoising primary sound waves, the present invention converts the cost into the cost of active denoising, so as to realize unnecessary starting and reduce the complexity of unnecessary primary sound waves.

Further, the evaluation index in the third layer and affecting the cost includes a sound size and a complexity of the primary sound wave.

On the other hand, the invention provides a noise reduction device applying the method for actively reducing noise of the power distribution room, and the device comprises a primary sound wave conversion module, a comprehensive grading module and a secondary sound wave output module; the primary sound wave conversion module is connected with the comprehensive scoring module, and the comprehensive scoring module is also connected with the secondary sound wave output module;

the comprehensive grading module is internally provided with the hierarchical analysis algorithm.

The device is characterized in that a primary sound wave is separated into a high-frequency sound wave and a low-frequency sound wave through a primary sound wave conversion module, the high-frequency sound wave, the low-frequency sound wave and a full wave are converted into electric signals by the primary sound wave conversion module and transmitted to a comprehensive scoring module, the comprehensive scoring module receives the electric signals and calculates comprehensive scoring values of different noise reduction modes according to a hierarchical analysis algorithm arranged in the comprehensive scoring module, then an optimal active noise reduction mode is selected for noise reduction according to the magnitude of the comprehensive scoring values, electric signals with the same amplitude and opposite phases of the electric signals corresponding to the selected noise reduction mode and waveform conversion are generated and output to a secondary sound wave output module; the secondary sound wave output module converts the electric signal into secondary sound waves to be emitted outwards, and the secondary sound waves counteract corresponding sound waves in the primary sound waves to achieve the purpose of noise reduction.

By adopting the noise reduction device, the purpose of active noise reduction can be realized, and noise reduction can be realized without adding damping parts and coating noise reduction materials, so that the noise reduction cost is reduced, and the heat dissipation of equipment cannot be influenced by coating other materials; meanwhile, the device has multiple noise reduction modes, noise can be reduced respectively aiming at high-frequency sound waves, low-frequency sound waves and full waves, the noise reduction effect can be improved through more targeted implementation, and the problem that the noise reduction effect is poor due to the fact that the inherent noise reduction frequency of the noise reduction part is inconsistent with the frequency generated by noise is avoided.

Furthermore, the noise reduction device also comprises an error sound wave receiving module, wherein the error sound wave receiving module is connected with the comprehensive scoring module; the composite scoring module includes an adaptive algorithm controller.

It should be noted that, after the comprehensive scoring module selects the noise reduction mode, the electric signals of the sound waves corresponding to the noise reduction mode are transmitted to the adaptive algorithm controller as reference waveforms, and then electric signals with the same amplitude and opposite phases are generated according to the reference waveforms in the adaptive algorithm controller and are output to the secondary sound wave output module; the error sound wave receiving module is used for receiving noise in the environment after active noise reduction, separating the noise, converting the noise into electric signals and transmitting the electric signals to the comprehensive scoring module to calculate comprehensive scoring values of different noise reduction modes, the comprehensive scoring module selects the optimal noise reduction mode and transmits the corresponding waveform to the adaptive algorithm controller to serve as a reference waveform, and therefore the waveform output by noise reduction can be dynamically adjusted in real time, and the active noise reduction effect is optimal.

Compared with the prior art, the technical scheme of the invention has the beneficial effects that:

the active noise reduction method of the invention separates the noise in the power distribution room into high-frequency sound wave and low-frequency sound wave; evaluating the noise-reduced effect of different modes; after respective comprehensive scores of active noise reduction calculation in different modes are calculated, an optimal active noise reduction mode corresponding to the comprehensive evaluation is selected for noise reduction; noise reduction can be realized without adding damping parts and coating noise reduction materials, so that the noise reduction cost is reduced, and the heat dissipation of equipment cannot be influenced by coating other materials; meanwhile, the method has multiple noise reduction modes, can respectively reduce noise aiming at high-frequency sound waves, low-frequency sound waves and full waves, can improve the noise reduction effect by more targeted implementation, and cannot cause poor noise reduction effect due to the fact that the inherent noise reduction frequency of the noise reduction part is not consistent with the frequency generated by noise.

According to the active noise reduction device, a primary sound wave is separated into a high-frequency sound wave and a low-frequency sound wave through a primary sound wave conversion module, in addition, the high-frequency sound wave, the low-frequency sound wave and the full wave are converted into electric signals to be transmitted to a comprehensive grading module, the comprehensive grading module receives the electric signals and then calculates comprehensive grading values of different noise reduction modes according to a hierarchical analysis algorithm arranged in the comprehensive grading module, then according to the magnitude of the comprehensive grading values, an optimal active noise reduction mode is selected for noise reduction, electric signals with the same amplitude and opposite phases of the electric signals corresponding to the selected noise reduction mode and waveform conversion are generated and output to a secondary sound wave output module; the secondary sound wave output module converts the electric signal into secondary sound waves to be emitted outwards, and the secondary sound waves counteract corresponding sound waves in the primary sound waves to achieve the purpose of noise reduction. By adopting the noise reduction device, the purpose of active noise reduction can be realized, and noise reduction can be realized without adding damping parts and coating noise reduction materials, so that the noise reduction cost is reduced, and the heat dissipation of equipment cannot be influenced by coating other materials; meanwhile, the device has multiple noise reduction modes, noise can be reduced respectively aiming at high-frequency sound waves, low-frequency sound waves and full waves, the noise reduction effect can be improved through more targeted implementation, and the problem that the noise reduction effect is poor due to the fact that the inherent noise reduction frequency of the noise reduction part is inconsistent with the frequency generated by noise is avoided.

Drawings

FIG. 1 is a flowchart of an active noise reduction method according to embodiment 1 of the present invention;

FIG. 2 is a hierarchical structure diagram of a hierarchical analysis algorithm in embodiment 1 of the present invention;

fig. 3 is a schematic structural diagram of a noise reduction device in embodiment 2 of the present invention.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the patent;

for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product;

it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.