CN103425887A - Transformer substation worker workplace noise analysis method and system - Google Patents

Abstract

The invention discloses a noise analysis method for substation workers' workplaces, which comprises the following steps: 1) collecting basic data; 2) constructing a physical model; 3) calculating noise values at operating points; health evaluation. This method can accurately consider the geometric divergence of noise propagation, and the influence of the atmosphere, ground, buildings, green belts, etc. It provides a reference for the evaluation of noise hygiene in the workplace of employees, and effectively assists the monitoring and evaluation of noise occupational hygiene in substations. At the same time, the invention also provides a noise analysis system for the substation worker's workplace.

Description

Noise analysis method and system for substation workers' workplaces

technical field

The invention relates to the field of occupational health evaluation of noise working environment, in particular to a method for analyzing noise in workplaces of transformer substation workers, and also relates to a noise analysis system for workplaces of transformer substation workers.

Background technique

The noise in the substation mainly comes from the noise equipment of transformers, reactors and fans. In order to ensure the safe operation of power equipment, electric power workers often work in substations, including inspections, tests or maintenance, especially when they work for a long time near high-noise equipment such as transformers. These noises may have a certain impact on the physical health of power workers. hazards. Therefore, it is of great practical significance to carry out the prediction analysis and evaluation of the noise in the workplace of substation workers, strengthen the labor protection of power workers, and promote the healthy and efficient development of enterprises. In general, the occupational health evaluation of noise in substation workplaces mainly includes the following contents:

1. Calculation of noise distribution in the substation workplace: it is necessary to consider various attenuations caused by ground, atmospheric absorption, obstacles, etc. during the noise propagation process;

2. Prediction and calculation of the noise value of the operating point: it is necessary to consider the influence of the background noise of different operating points;

3. Limits of exposure time for operators: According to relevant national standards, after the noise at the operating point reaches a certain limit, the operators cannot exceed the specified working time limit;

4. Determination of the size of the area covered by the operating sanitation limit: there are many noise sources in the substation and the scene is more complex, so the noise distribution in the workplace is uneven, and it is necessary to be able to accurately calculate the area covered by the operating sanitation limit;

At present, there are not many researches at home and abroad on this kind of problem. Some of them just do some investigation and analysis work, or develop a brief evaluation program. There is still a lack of special analysis tools, especially in the noise evaluation of substation workplaces. Systematic and proven good method. Therefore, there is an urgent need for a noise analysis method for substation workplaces, which can comprehensively consider various influencing factors and provide reference for occupational health management and evaluation of electric power enterprises.

Contents of the invention

In view of this, the technical problem to be solved by the present invention is to provide a noise analysis method and system for substation workers' workplaces.

One of the purposes of the present invention is to provide a noise analysis method for substation workers' workplaces; the second purpose of the invention is to provide a noise analysis system for substation workers' workplaces.

One of purpose of the present invention is achieved through the following technical solutions:

The noise analysis method of substation worker's workplace provided by the present invention comprises the following steps:

S1: Obtain the basic data of the substation, the basic data includes the location data of the environmental space of the workplace of the substation workers, and the sound characteristic data of the noise source;

S2: Construct a physical model of the actual scene according to the environmental space location data of the substation worker's workplace;

S3: Calculate the noise value of the operating point according to the physical model of the actual scene, the noise value of the operating point includes the calculation of the noise value of the single operating point and the noise value of the regional operating point;

S4: Select an operation point in the substation as a check point, and obtain the noise value error of the check point through check calculation;

S5: Judging whether the noise value error reaches the set required limit, if not, return to step S3 until the noise value error meets the set required limit, and enter the next step;

S6: Determine the occupational health work time limit of the operating point and the size of the area covered by the set limit value according to the calculated noise value of the operating point.

Further, the following steps are also included:

S7: output the occupational health noise analysis report of the substation operation point and the occupational health evaluation of the operation point in the form of a 2D plane simulation diagram.

Further, the operating point refers to the position where the operator stays, and the spatial coordinate parameters are used to predict and calculate the noise value of the operating point.

Further, the noise value of the operating point is calculated according to the following steps, and the specific calculation process is as follows:

S31: Obtain the background noise and coordinates of the operating point;

S32: select a sound source;

S33: Select an octave band;

S34: Calculate octave band geometric attenuation;

S35: Calculate the atmospheric absorption attenuation in the octave band;

S36: Calculate the octave band ground attenuation;

S37: Determine whether there is an obstacle between the operating point and the sound source, if yes, go to step S38; if not, go to step S38;

S38: Calculate octave band obstacle attenuation;

S39: Calculate the attenuation synthesis of the octave band;

S310: Determine whether the calculation of the octave band is completed, if completed, enter step S311; if not, enter step S33;

S311: Synthesize the background noise to obtain the final sound pressure level of the operation point.

S312: Judging whether the calculation of all noise sources is completed, if completed, proceed to step S313; if not completed, proceed to step S32;

S313: Synthesize the final sound pressure level of the operation point, where the final sound pressure level is the noise value of the operation point.

Further, the occupational health evaluation of the operation point is realized in the following ways:

a. Visually display the overall distribution of noise values in substation workers' work scenes with 2D plane simulation diagram;

b. Output the contour map in 2D form, visually display the range covered by the noise operating environment of the substation higher than the occupational health limit.

c. Output detailed prediction reports and scene information in the form of tables and WORD. The prediction reports include: the A-weighted sound level of each frequency at the operating point, whether it is in the area covered by the occupational health limit and the occupational health of the operating point working hours.

Further, the environmental spatial position data of the substation workers’ workplaces includes geometric size related data of buildings, walls, transformers, switchyards, noise isolation and reduction facilities, green belts in the substation and the spatial position of substation operating points;

The sound feature data of the noise source includes octave band sound power level, sound pressure level and background noise sound pressure level data of all noise sources in the substation;

The physical model of the actual scene includes buildings, noise source equipment, other electrical equipment in the switchyard, surrounding walls, spatial position coordinates of substation internal operating points, and sound feature data of noise sources;

The noise value of the single operation point is to regard the noise source as a surface sound source or a point sound source as required, calculate the attenuation caused by geometric divergence, atmospheric absorption, ground effect, obstacles, and trees, and then subtract the sound power level of the noise source The attenuation values of the above items are combined with the background noise value of a certain operating point to obtain the noise value at a certain operating point;

The noise value of the regional operating point is to divide the regional plane to be calculated into a plurality of small areas, take the midpoint of each small area as the operating point, and use the single operating point noise value calculation method to calculate the sound pressure level of the operating point, And use this sound pressure level to indicate the sound pressure level of all operating points in this area.

Two of the purpose of the present invention is achieved through the following technical solutions:

The noise analysis system for substation workers' workplaces provided by the present invention includes a basic data management module, a scene modeling module, a data processing module, and a forecast report output module;

The basic data management module is used to obtain the environmental space position data of the substation worker's workplace and the sound feature data of the noise source;

The scene modeling module is used to construct a physical model of the actual scene according to the environmental space position data of the substation worker's workplace;

The data processing module is used to calculate the noise value and noise value error of the operating point according to the physical model of the actual scene, and judge whether the noise value error reaches the set required limit until the noise value error meets the set required limit;

The forecast report output module is used to determine the occupational health working time limit of the operating point and the area covered by the occupational health limit value according to the calculated noise value of the operating point

Further, the basic data management module includes an environmental space position data module of substation workers' workplaces, a sound characteristic data module of noise sources, a noise reduction facility management module, a near-field parameter management module, and a sound source management module;

The environmental space position data module of the substation workers' workplace is used to obtain the spatial position and geometric size related data of buildings, walls, transformers, switch yards, noise isolation and reduction facilities, green belts and operating points around the substation in the substation;

The sound feature data module of the noise source is used to obtain the octave band sound power level and sound pressure level of all noise sources in the substation and the actual recording audio data and background noise sound pressure level data of the noise source;

The noise reduction facility management module is used for storage and management of different noise reduction facility parameters;

The near-field parameter management module is used for storage and management of near-field sound source parameters;

The sound source management module is used for storage and management of non-near-field sound source parameters.

Further, the data processing module includes an operation point noise value calculation module, and the operation point noise value calculation module is calculated according to the following steps, and the specific calculation process is as follows:

S31: Obtain the background noise and coordinates of the operating point;

S32: select a sound source;

S33: Select an octave band;

S34: Calculate octave band geometric attenuation;

S35: Calculate the atmospheric absorption attenuation in the octave band;

S36: Calculate the octave band ground attenuation;

S37: Determine whether there is an obstacle between the operating point and the sound source, if yes, go to step S38; if not, go to step S38;

S38: Calculate octave band obstacle attenuation;

S39: Calculate the attenuation synthesis of the octave band;

S310: Determine whether the calculation of the octave band is completed, if completed, enter step S311; if not, enter step S33;

S311: Synthesize the background noise to obtain the final sound pressure level of the operation point.

S312: Judging whether the calculation of all noise sources is completed, if completed, proceed to step S313; if not completed, proceed to step S32;

S313: Synthesize the final sound pressure level of the operation point, where the final sound pressure level is the noise value of the operation point.

Further, the forecast report output module is used for

a. Visually display the overall noise value distribution of the substation operation scene in the form of a 2D color map;

b. Output the equivalent curve in the form of 2D, visually display the influence range of the noise in the workplace of substation workers under a specific limit;

c. Output the noise data of any plane area of the substation in the form of color contrast, and visually display the area covered by the occupational health limit on the plane;

d. Output detailed forecast reports and scene information in the form of tables and WORD.

The advantage of the present invention is that: the present invention adopts the noise analysis method of substation workers' workplaces to accurately consider the geometric divergence of noise propagation, and the influence of the atmosphere, ground, buildings, green belts, etc. on the noise attenuation in the propagation path, so as to accurately predict the transformer. The noise level of any operating point in the surrounding space provides a reference for the evaluation of noise occupational health in the workplace of substation workers; through the 2D plane simulation map of the substation scene, the visual demonstration of the distribution of substation noise can effectively assist the monitoring and evaluation of substation noise occupational health ; It is conducive to improving the occupational health management and technical evaluation level of electric power enterprises, and is conducive to promoting the healthy and efficient development of enterprises.

Description of drawings

In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the accompanying drawings, wherein:

Fig. 1 is the composition schematic diagram of system module of the present invention;

Fig. 2 is a system work flowchart of the present invention;

Fig. 3 is a schematic diagram of data processing flow in the present invention;

Fig. 4 is a schematic flow chart of the method of the present invention;

Fig. 5 is a schematic flow chart of the noise calculation of the present invention;

Fig. 6 is a flow chart of the occupational health evaluation of the operating point in the present invention.

Detailed ways

The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings; it should be understood that the preferred embodiments are only for illustrating the present invention, rather than limiting the protection scope of the present invention.

Fig. 1 is a schematic diagram of the composition of the system modules of the present invention. As shown in Fig. 1, the noise analysis system of the substation workers' workplace provided by the present invention includes a basic data management module, a scene modeling module, a data processing module, and a forecast report output module; wherein,

The basic data management module is used to obtain the environmental space location data of the substation worker's workplace and the sound characteristic data of the noise source; the basic data management module in this embodiment is used to manage the sound source/noise reduction facility database , including the establishment of the sound source/noise reduction facility database, the import of basic data, and the deletion, modification and maintenance of the basic data; in this embodiment, the basic data includes structure location data, noise source location data, and sound pressure level data; The location data of structures at least includes the plane geometric dimensions of substations, buildings, walls, noise isolation facilities, green belts and switch yards, and the plane and space position data; the noise source position data includes at least the plane and space position data of transformer sound sources ;Sound pressure level data include at least basic data of sound source octave band sound pressure level and background sound pressure level;

The scene modeling module is used to construct the physical model of the actual scene according to the environmental space position data of the substation worker's workplace; the scene modeling module in this embodiment: used for the plane of the elements that can cause sound source attenuation in the scene Modeling, and can set scene properties and element properties in the scene;

The data processing module is used to calculate the noise value and noise value error of the operating point according to the physical model of the actual scene, and judge whether the noise value error reaches the set required limit until the noise value error meets the set required limit; this implementation The data processing module in the example: under the given temperature and humidity, read the scene information, calculate the noise distribution of the scene, and pass the scene data and noise distribution data to the forecast report output module and the optimization calculation module.

The predictive report output module is used to determine the occupational health working time limit of the operating point and the area covered by the occupational health limit value according to the calculated noise value of the operating point; the predictive report output module in this embodiment: according to the scene data and noise distribution data, output the prediction result of noise distribution, and the prediction result includes:

a. Visually display the distribution of substation plane noise values in the form of a 2D color map;

b. Output the equivalent curve in the form of 2D, visually display the influence range of the noise in the workplace of substation workers under a specific limit;

c. Output the noise data of any plane area of the substation in the form of color contrast, and visually display the area covered by the occupational health limit on the plane;

d. Output detailed forecast reports and scene information in the form of tables and WORD.

The basic data management module includes an environmental space position data module of substation workers' workplaces, a sound characteristic data module of noise sources, a noise reduction facility management module, a near-field parameter management module, and a sound source management module;

The environmental space position data module of the substation workers' workplace is used to obtain the spatial position and geometric size related data of buildings, walls, transformers, switch yards, noise isolation and reduction facilities, green belts and operating points around the substation in the substation;

The sound feature data module of the noise source is used to obtain the octave band sound power level, sound pressure level and background noise sound pressure level data of all noise sources in the substation;

The noise reduction facility management module is used for storage and management of different noise reduction facility parameters;

The near-field parameter management module is used for storage and management of near-field sound source parameters;

The sound source management module is used for storage and management of non-near-field sound source parameters.

The data processing module includes an operation point noise value calculation module, and the operation point noise value calculation module is calculated according to the following steps, and the specific calculation process is as follows:

S31: Obtain the background noise and coordinates of the operating point;

S32: select a sound source;

S33: Select an octave band;

S34: Calculate octave band geometric attenuation;

S35: Calculate the atmospheric absorption attenuation in the octave band;

S36: Calculate the octave band ground attenuation;

S37: Determine whether there is an obstacle between the operating point and the sound source, if yes, go to step S38; if not, go to step S38;

S38: Calculate octave band obstacle attenuation;

S39: Calculate the attenuation synthesis of the octave band;

S310: Determine whether the calculation of the octave band is completed, if completed, enter step S311; if not, enter step S33;

S311: Synthesize the background noise to obtain the final sound pressure level of the operation point.

S312: Judging whether the calculation of all noise sources is completed, if completed, proceed to step S313; if not completed, proceed to step S32;

S313: Synthesize the final sound pressure level of the operation point, where the final sound pressure level is the noise value of the operation point.

Fig. 2 is a system work flow chart of the present invention, as shown in Fig. 2, the basic data management module completes the management of noise reduction facilities and sound source information, and generates the noise reduction facility and sound source information database.

The scene modeling module completes graphic modeling and scene and attribute setting of each element. When setting the properties of noise reduction facilities and sound sources, data can be directly read from the database of noise reduction facilities and sound source information.

The data processing module completes noise calculation, planar grid data calculation, spatial grid data calculation and isosurface data calculation, among which noise calculation is the core of the whole calculation, responsible for calculating the impact of a certain octave band of a certain sound source in a specific scene The noise influence of the operating point, and the calculation results of multi-octave bands of multiple sound sources are synthesized to obtain the final noise value of a certain operating point; the plane grid data calculation calculates the noise distribution of the plane according to the plane and grid size specified by the user Data; spatial grid data calculation calculates the spatial noise distribution data according to the user-specified spatial grid calculation area and grid division method; contour surface data calculation calculates the distribution state of the noise value in space according to the noise value given by the user .

The forecast report output module includes: visually displaying the distribution of substation plane noise values in the form of 2D color maps, and marking the equivalent curves of different noise limits in combination with national occupational health standards, visually displaying the noise level of substation workers' workplaces under specific limits The scope of influence can provide a reference for the occupational health evaluation of workers in substation workplaces; the noise prediction document report can output a calculation report in WORD2003/2007 format.

Fig. 3 is the flow diagram of data processing of the present invention, as shown in Fig. 3, the data transmission relation between each module is as follows: the basic data management module provides noise reduction facilities and sound source data for scene modeling, and the data processing module starts from the graphical model Read the scene and the information of each element in it and perform data processing, and output the processed data to the forecast report output module according to the requirements of the forecast report output module; and the forecast report output module will call the data processing module for display when displaying Data calculation and analysis, obtaining the size of the area covered above the occupational health limit, etc.

Fig. 4 is the schematic flow chart of the method of the present invention, as shown in Fig. 4, the noise analysis method of substation worker workplace of the present invention, comprises the following steps:

S1: Obtain the basic data of the substation, the basic data includes the location data of the environmental space of the workplace of the substation workers, and the sound characteristic data of the noise source;

S2: Construct the physical model of the actual scene according to the environmental space location data of the substation workers' workplace;

S3: Calculate the noise value of the operating point according to the physical model of the actual scene, the noise value of the operating point includes the calculation of the noise value of the single operating point and the noise value of the regional operating point;

S4: Select an operation point in the substation as a check point, and obtain the noise value error of the check point through check calculation;

Select the appropriate operating point as the calibration point, use a specific frequency attenuation for calibration or adopt the method of combining the attenuation value of the acceptance point and the background value for calibration calculation, and calculate the absolute error and relative error;

S5: Judging whether the noise value error reaches the set requirement limit, which is set to 1dB(A) in this embodiment, if not, then return to step S3 until the noise value error meets the set requirement limit, and enter the next step ;

S6: Determine the occupational health work time limit of the operation point and the area covered by the set limit value according to the calculated noise value of the operation point.

S7: output the occupational health noise analysis report of the substation operation point and the occupational health evaluation of the operation point in the form of a 2D plane simulation diagram.

The operating point refers to the position where the operator stays, and the noise value of the operating point is predicted and calculated by using its spatial coordinate parameters.

Fig. 5 is a schematic diagram of the noise calculation process of the present invention, as shown in the figure, the noise value of the operating point is calculated according to the following steps, and the specific calculation process is as follows:

S31: Obtain the background noise and coordinates of the operating point;

S32: select a sound source;

S33: Select an octave band;

S34: Calculate octave band geometric attenuation;

S35: Calculate the atmospheric absorption attenuation in the octave band;

S36: Calculate the octave band ground attenuation;

S37: Determine whether there is an obstacle between the operating point and the sound source, if yes, go to step S38; if not, go to step S38;

S38: Calculate octave band obstacle attenuation;

S39: Calculate the attenuation synthesis of the octave band;

S310: Determine whether the calculation of the octave band is completed, if completed, enter step S311; if not, enter step S33;

S311: Synthesize the background noise to obtain the final sound pressure level of the operation point.

S312: Judging whether the calculation of all noise sources is completed, if completed, proceed to step S313; if not completed, proceed to step S32;

S313: Synthesize the final sound pressure level of the operation point, where the final sound pressure level is the noise value of the operation point.

Occupational health evaluation of the operating point is achieved in the following ways:

a. Visually display the overall distribution of noise values in substation workers' work scenes with 2D plane simulation diagram;

b. Output the contour map in 2D form, visually display the range covered by the noise operating environment of the substation higher than the occupational health limit.

c. Output detailed forecast reports and scene information in the form of tables and WORD. The forecast reports include: the A-weighted sound level of each frequency at the operating point, whether it is in the area covered by the occupational health limit and the working time limit of the operating point.

The environmental spatial location data of the substation workers' workplaces includes the spatial location and geometric size related data of buildings, enclosures, transformers, switch yards, noise isolation and reduction facilities, green belts, and operating points around the substation in the substation;

The sound feature data of the noise source includes octave band sound power level, sound pressure level and background noise sound pressure level data of all noise sources in the substation;

The physical model of the actual scene includes buildings, noise source equipment, other electrical equipment in the switchyard, surrounding walls, spatial position coordinates of substation internal operating points, and sound feature data of noise sources;

The noise value of the single operation point is to regard the noise source as a surface sound source or a point sound source as required, calculate the attenuation caused by geometric divergence, atmospheric absorption, ground effect, obstacles, and trees, and then subtract the sound power level of the noise source The attenuation values of the above items are combined with the background noise value of a certain operating point to obtain the noise value at a certain operating point;

The noise value of the regional operating point is to divide the regional plane to be calculated into a plurality of small areas, take the midpoint of each small area as the operating point, and use the single operating point noise value calculation method to calculate the sound pressure level of the operating point, And use this sound pressure level to indicate the sound pressure level of all operating points in this area.

In this embodiment, as shown in Figure 6, in the occupational health evaluation in step 5), the functions of each module are as follows:

Scene information: the information of scene modeling;

Operating point coordinates: refers to the spatial position parameters where the operator stays;

Output: The noise value of each operating point, according to the national occupational health standards, it is judged whether it is in the area covered by the specified limit value, and if it is not in the area covered by the specified limit value, the sanitation work time limit is given.

The system provided by this embodiment is displayed and output in the form of graphics and images in terms of scene modeling and two-dimensional scenes, which is more intuitive and realistic; it realizes the combination of points and surfaces to carry out all-round monitoring of the internal and surrounding operating points of the substation Noise analysis method; realizes occupational health evaluation function of substation workplace, and can provide effective reference for power managers and technicians.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (10)

1. The transformer substation worker workplace noise analysis method is characterized by comprising the following steps: the method comprises the following steps:

s1: acquiring basic data of a transformer substation, wherein the basic data comprises environmental space position data of a transformer substation worker workplace and sound characteristic data of a noise source;

s2: constructing a physical model of an actual scene according to the environmental space position data of the transformer substation worker workplace;

s3: calculating operation point noise values according to a physical model of an actual scene, wherein the operation point noise values comprise single operation point noise value calculation and area operation point noise values;

s4: selecting an operation point in the transformer substation as a check point, and obtaining a noise value error of the check point through check calculation;

s5: judging whether the noise value error reaches a set requirement limit value, if not, returning to the step S3 until the noise value error meets the set requirement limit value, and entering the next step;

s6: and determining the occupational health working time limit of the working point and the area covered by the working point higher than the set limit value according to the calculated noise value of the working point.

2. The transformer substation worker workplace noise analysis method according to claim 1, characterized in that: further comprising the steps of:

s7: and outputting a transformer substation operation point occupational health noise analysis report and an operation point occupational health evaluation in a form of a 2D plane simulation diagram.

3. The transformer substation worker workplace noise analysis method according to claim 1, characterized in that: the operation point refers to the position where the operator stays, and the noise value of the operation point is predicted and calculated by using the space coordinate parameters.

4. The transformer substation worker workplace noise analysis method according to claim 1, characterized in that: the operation point noise value is calculated according to the following steps, and the specific calculation process is as follows:

s31: acquiring background noise and coordinates of an operating point;

s32: selecting a sound source;

s33: selecting a frequency doubling band;

s34: calculating geometric attenuation of a frequency doubling band;

s35: calculating the atmospheric absorption attenuation of the octave frequency band;

s36: calculating the multiple frequency band ground attenuation;

s37: judging whether an obstacle exists between the operation point and the sound source, if so, entering the step S38; if not, go to step S38;

s38: calculating the attenuation of the frequency doubling band obstacle;

s39: calculating the attenuation composition of the octave frequency band;

s310: judging whether the frequency doubling band is calculated, and if so, entering the step S311; if not, go to step S33;

s311: and synthesizing background noise to obtain the final sound pressure level of the operation point.

S312: judging whether all the noise sources are calculated, and if so, entering step S313; if not, go to step S32;

s313: and synthesizing the final sound pressure level of the operation point, wherein the final sound pressure level is the noise value of the operation point.

5. The transformer substation worker workplace noise analysis method according to claim 2, characterized in that: the job site occupational health assessment is achieved by:

a. visually displaying the overall distribution condition of the noise values of the transformer substation worker operation scene by using a 2D plane simulation diagram;

b. and outputting a contour line plan in a 2D form, and visually displaying the range size of the transformer substation noise operation environment higher than the occupational health limit value coverage.

c. Outputting detailed prediction reports and scene information in the form of tables and WORD, wherein the prediction reports comprise: and (4) weighting the sound level of each frequency A of the operation point, judging whether the sound level is in an area covered by the occupational health limit value or not and judging whether the sound level is in the occupational health working time limit of the operation point.

6. The transformer substation worker workplace noise analysis method according to claim 1, characterized in that: the environment space position data of the substation worker work place comprises the relative data of the geometric dimensions of buildings, enclosing walls, transformers, switch yards, noise insulation and reduction facilities and green belts in the substation and the space positions of all work points in the substation;

the sound characteristic data of the noise sources comprise octave frequency band sound power level, sound pressure level and background noise sound pressure level data of all the noise sources in the transformer substation;

the physical model of the actual scene comprises buildings, noise source equipment, other electrical equipment in a switch yard, surrounding walls, space position coordinates of operation points in the transformer substation and sound characteristic data of the noise source;

the single operation point noise value is obtained by taking a noise source as a surface sound source or a point sound source according to needs, calculating attenuation caused by geometric divergence, atmospheric absorption, a ground effect, an obstacle and trees, subtracting the attenuation values from the sound power level of the noise source, and combining the background noise value of a certain operation point;

the area operation point noise value is obtained by dividing an area plane to be calculated into a plurality of small areas, taking the middle point of each small area as an operation point, calculating the sound pressure level of the operation point by using a single operation point noise value calculation method, and expressing the sound pressure level of all operation points in the area by using the sound pressure level.

7. A transformer substation worker workplace noise analysis system established according to the transformer substation worker workplace noise analysis method according to any one of claims 1 to 6, characterized in that: the system comprises a basic data management module, a scene modeling module, a data processing module and a prediction report output module;

the basic data management module is used for acquiring environmental space position data of a transformer substation worker workplace and sound characteristic data of a noise source;

the scene modeling module is used for constructing a physical model of an actual scene according to the environmental space position data of the transformer substation worker workplace;

the data processing module is used for calculating the noise value and the noise value error of the operation point according to the physical model of the actual scene, and judging whether the noise value error reaches the set requirement limit value or not until the noise value error meets the set requirement limit value;

and the prediction report output module is used for determining the occupational health working time limit of the working point and the range size covered by the working point higher than the health limit value according to the calculated noise value of the working point.

8. The substation worker workplace noise analysis system of claim 7, wherein: the basic data management module comprises an environment space position data module to which a transformer substation worker workplace belongs, a sound characteristic data module of a noise source, a noise reduction facility management module, a near field parameter management module and a sound source management module;

the transformer substation worker work place belonging environment spatial position data module is used for acquiring the geometric dimension related data of buildings, enclosing walls, transformers, switch yards, noise insulation and reduction facilities and green belts in the transformer substation and the spatial positions of work points;

the sound characteristic data module of the noise source is used for acquiring octave frequency band sound power level, sound pressure level and background noise sound pressure level data of all the noise sources in the transformer substation;

the noise reduction facility management module is used for storing and managing different noise reduction facility parameters;

the near field parameter management module is used for storing and managing near field sound source parameters;

and the sound source management module is used for storing and managing non-near-field sound source parameters.

9. The substation worker workplace noise analysis system of claim 7, wherein: the data processing module comprises an operation point noise value calculation module, the operation point noise value calculation module calculates according to the following steps, and the specific calculation process is as follows:

s31: acquiring background noise and coordinates of an operating point;

s32: selecting a sound source;

s33: selecting a frequency doubling band;

s34: calculating geometric attenuation of a frequency doubling band;

s35: calculating the atmospheric absorption attenuation of the octave frequency band;

s36: calculating the multiple frequency band ground attenuation;

s37: judging whether an obstacle exists between the operation point and the sound source, if so, entering the step S38; if not, go to step S38;

s38: calculating the attenuation of the frequency doubling band obstacle;

s39: calculating the attenuation composition of the octave frequency band;

s310: judging whether the frequency doubling band is calculated, and if so, entering the step S311; if not, go to step S33;

s311: and synthesizing background noise to obtain the final sound pressure level of the operation point.

S312: judging whether all the noise sources are calculated, and if so, entering step S313; if not, go to step S32;

s313: and synthesizing the final sound pressure level of the operation point, wherein the final sound pressure level is the noise value of the operation point.

10. The substation worker workplace noise analysis system of claim 7, wherein: the prediction report output module is used for

a. Visually displaying the overall noise value distribution of the operation scene of the transformer substation in a 2D color image form; or

b. Outputting an equivalent curve in a 2D form, and visually displaying the influence range of the noise of the transformer substation worker workplace under a specific limit value; or

c. Outputting noise data of any plane area of the transformer substation in a color comparison mode, and visually displaying occupational health limit coverage areas on the planes; or

d. The detailed prediction report and the scene information are output in the form of a table and WORD.

Images