CN103425887A - Transformer substation worker workplace noise analysis method and system - Google Patents
Transformer substation worker workplace noise analysis method and system Download PDFInfo
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Abstract
The invention discloses a transformer substation worker workplace noise analysis method, which comprises the following steps of 1) basic data collection; 2) physical model building; 3) work point noise value calculation; 4) exposure limit judgment; and 5) work point occupational sanitation evaluation. The method has the advantages that the influence on the noise attenuation caused by the geometric divergence of the noise propagation, and atmosphere, ground, buildings, green belts and the like in the propagation path can be accurately considered, so the noise intensity of any work points in a transformer and the peripheral space of the transformer can be accurately predicated, references are provided for the transformer substation worker workplace noise sanitation evaluation, and the monitoring and the evaluation of the transformer substation noise occupational sanitation can be effectively assisted. Meanwhile, the invention also provides a transformer substation worker workplace noise analysis system.
Description
Technical Field
The invention relates to the field of noise operation environment occupational health evaluation, in particular to a transformer substation worker workplace noise analysis method and a transformer substation worker workplace noise analysis system.
Background
The noise in the transformer substation mainly comes from noise equipment of a transformer, a reactor and a fan. In order to ensure the safe operation of the power equipment, power workers often work in the substation, including inspection, testing or maintenance, particularly for a long time in the vicinity of high-noise equipment such as a transformer, and the noise may cause certain damage to the physiological health of the power workers. Therefore, the method has very important practical significance for developing the prediction analysis and evaluation of the noise of the transformer substation worker workplace, enhancing the labor protection of power workers and promoting the healthy and efficient development of enterprises. Generally, the noise occupational health evaluation of the substation workplace mainly comprises the following contents:
1. calculating the noise distribution of the transformer substation operation site: various attenuations caused by the ground, atmospheric absorption, obstacles, etc. of the noise during propagation need to be considered;
2. working point noise value prediction calculation: the influence of background noise of different operation points needs to be considered;
3. contact time limit for operator: according to the relevant national standard, after the noise of the operation point reaches a certain limit value, the operator can not exceed the specified working time limit;
4. judging the size of the area covered by the working sanitation limit value: the noise sources in the transformer substation are more, and the scene is more complex, so that the noise distribution of a working place is uneven, and the area range covered by the working hygiene limit value can be accurately calculated;
at present, for the problems, few domestic and foreign researches are carried out, some research and analysis works are only carried out, or a simple evaluation program is developed, a special analysis tool is also lacked, and a scientific, systematic and effective good method is also lacked particularly in the aspect of noise evaluation of a transformer substation operation place. Therefore, a noise analysis method for a substation workplace is urgently needed, various influence factors can be comprehensively considered, and references are provided for occupational health management and evaluation of power enterprises.
Disclosure of Invention
In view of this, the technical problem to be solved by the present invention is to provide a method and a system for analyzing noise of a transformer substation worker workplace.
One of the purposes of the invention is to provide a noise analysis method for a transformer substation worker workplace; the invention also aims to provide a transformer substation worker workplace noise analysis system.
One of the purposes of the invention is realized by the following technical scheme:
the invention provides a transformer substation worker workplace noise analysis method which 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 size of the area covered by the working point higher than the set limit value according to the calculated noise value of the working point.
Further, the method also comprises the following steps:
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.
Further, the work point is a position where the worker stays, and the work point noise value is predicted and calculated by using the spatial coordinate parameter.
Further, 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.
Further, 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.
Further, the environment space position data of the substation worker operation site comprises the space positions of buildings, enclosing walls, transformers, switch yards, noise insulation and reduction facilities, green belts and the geometric dimension related data of the substation operation 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 to obtain the noise value of the 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.
The second purpose of the invention is realized by the following technical scheme:
the invention provides a transformer substation worker workplace noise analysis system which comprises a basic data management module, a scene modeling module, a data processing module and a prediction report output module, wherein the basic data management module is used for managing the basic data of a transformer substation worker workplace;
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;
the prediction report output module is used for determining the occupational health working time limit of the working point and the area covered by the occupational health limit value according to the calculated noise value of the working point
Further, the basic data management module comprises an environment space position data module to which the 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 spatial position and geometric size related data of buildings, enclosing walls, transformers, switch yards, noise insulation and reduction facilities, green belts and work points around the transformer substation in the transformer substation;
the sound characteristic data module of the noise source is used for acquiring the octave sound power level and the sound pressure level of all the noise sources in the transformer substation, and the actual recording audio data and the background noise sound pressure level data of the noise sources;
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.
Further, the data processing module comprises an operation point noise value calculation module, and the operation point noise value calculation module calculates according to the following steps, specifically the 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.
Further, 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;
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;
c. outputting noise data of any plane area of the transformer substation in a color comparison mode, and visually displaying the area on the plane, which is higher than the occupational health limit value;
d. the detailed prediction report and the scene information are output in the form of a table and WORD.
The invention has the advantages that: according to the method, the geometric divergence of noise propagation can be accurately considered, and the influence of atmosphere, ground, buildings, green belts and the like on noise attenuation in a propagation path can be accurately considered, so that the noise of the transformer and any operation point in the peripheral space of the transformer can be accurately predicted, and a reference is provided for the occupational health evaluation of the noise of the transformer substation worker workplace; the transformer substation noise distribution condition is visually demonstrated through a transformer substation scene 2D plane simulation diagram, and monitoring and evaluation of transformer substation noise occupational health can be effectively assisted; the method is beneficial to improving the occupational health management and technical evaluation level of the power enterprises, and is beneficial to promoting the health and high-efficiency development of the enterprises.
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In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of the system module of the present invention;
FIG. 2 is a system flow diagram of the present invention;
FIG. 3 is a flow chart illustrating data processing according to the present invention;
FIG. 4 is a schematic flow chart of the method of the present invention;
FIG. 5 is a schematic diagram of a noise calculation process according to the present invention;
FIG. 6 is a flow chart of the job site occupational health assessment method of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings; it should be understood that the preferred embodiments are illustrative of the invention only and are not limiting upon the scope of the invention.
Fig. 1 is a schematic diagram of a system module composition of the present invention, and as shown in fig. 1, the transformer substation worker workplace noise analysis system provided by the present invention includes a basic data management module, a scene modeling module, a data processing module, and a prediction report output module; wherein,
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 basic data management module in this embodiment is configured to manage a sound source/noise reduction facility database, including establishing the sound source/noise reduction facility database, importing basic data, and deleting and modifying and maintaining the basic data; in this embodiment, the basic data includes structure position data, noise source position data, and sound pressure level data; the structure position data at least comprises the related data of the plane and space positions of the transformer substation, the plane geometry, the building, the enclosing wall, the noise reduction facility, the green belt and the switch yard; the noise source position data at least comprises plane and space position related data of a transformer sound source; the sound pressure level data at least comprises basic data of sound source octave band sound pressure level and background sound pressure level;
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 scene modeling module in this embodiment: the method is used for plane modeling of elements in a scene, which can cause sound source attenuation, and can set attributes of the scene and the attributes of the elements in the scene;
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; the data processing module in this embodiment: under the given temperature and humidity, reading scene information, calculating the noise distribution of the scene, and transmitting the scene data and the noise distribution data to a prediction report output module and an optimization calculation module.
The prediction report output module is used for determining the occupational health working time limit of the working point and the area covered by the occupational health limit value according to the calculated noise value of the working point; the prediction report output module in this embodiment: outputting a prediction result of the noise distribution according to the scene data and the noise distribution data, wherein the prediction result comprises:
a. visually displaying the distribution of the planar noise values of the transformer substation in a 2D color image form;
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;
c. outputting noise data of any plane area of the transformer substation in a color comparison mode, and visually displaying the area on the plane, which is higher than the occupational health limit value;
d. the detailed prediction report and the scene information are output in the form of a table and WORD.
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 spatial position and geometric size related data of buildings, enclosing walls, transformers, switch yards, noise insulation and reduction facilities, green belts and work points around the transformer substation in the transformer substation;
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.
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.
Fig. 2 is a system working flow chart of the present invention, as shown in fig. 2, the basic data management module completes the management of the noise reduction facilities and the sound source information, and generates the noise reduction facilities and the sound source information database.
The scene modeling module completes graphic modeling and setting of attributes of scenes and elements, wherein when the noise reduction facilities and the attributes of the sound source are set, data can be directly read from the noise reduction facilities and the sound source information database.
The data processing module completes noise calculation, plane grid data calculation, space grid data calculation and isosurface data calculation, wherein the noise calculation is the core of the whole calculation and is responsible for calculating the noise influence of a certain octave frequency band of a certain sound source on a certain operation point in a specific scene, and the calculation results of the multiple sound source octave frequency bands are synthesized to obtain the final noise value of the certain operation point; calculating the noise distribution data of the plane according to the plane and the grid size specified by a user by plane grid data calculation; calculating spatial noise distribution data according to a spatial grid calculation region and a grid division mode specified by a user by spatial grid data calculation; and (4) calculating the distribution state of the noise value in the space according to the noise value given by the user by the isosurface data calculation.
The prediction report output module includes: the distribution condition of the planar noise values of the transformer substation is visually displayed in a 2D color image form, equivalent curves of different noise limit values can be marked by combining with national occupational health standards, the influence range of noise of a transformer substation worker workplace under a specific limit value is visually displayed, and reference can be provided for occupational health evaluation of workers in the transformer substation; the noise prediction document report can output a calculation report in WORD2003/2007 format.
Fig. 3 is a schematic flow chart of data processing according to the present invention, and as shown in fig. 3, the data transmission relationship among the modules is as follows: the basic data management module provides noise reduction facilities and sound source data for scene modeling, the data processing module reads information of scenes and elements in the scenes from the graphic model and processes the information, and the processed data are output to the prediction report output module according to the requirements of the prediction report output module; and the prediction report output module calls the data processing module to calculate and analyze data when displaying, and obtains the size of the area range higher than the occupational health limit value.
Fig. 4 is a schematic flow chart of the method of the present invention, and as shown in fig. 4, the method of analyzing noise of the substation worker workplace of the present invention includes 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;
selecting proper operation point positions as check points, adopting a specific frequency attenuation to check or adopting a method of synthesizing an acceptance point attenuation value and a background value to check and calculate, and calculating an absolute error and a relative error;
s5: judging whether the noise value error reaches a set requirement limit value, setting the noise value error to be 1dB (A) in the embodiment, 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.
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.
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.
Fig. 5 is a schematic diagram of a noise calculation flow of the present invention, and as shown in the figure, the noise value of the operation point is calculated according to the following steps, specifically, the 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.
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, and judging whether the sound level is in an area covered by the occupational health limit value or not and whether the sound level is in the operation time limit of the operation point.
The environment spatial position data of the substation worker work place comprises spatial position and geometric dimension related data of buildings, enclosing walls, transformers, switch yards, noise insulation and reduction facilities, green belts and surrounding work points of 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 to obtain the noise value of the 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.
In this example, as shown in fig. 6, in the occupational health evaluation in step 5), the functions of the respective modules are as follows:
scene information: namely scene modeling information;
operating point coordinates: the space position parameter of the operator;
and (3) outputting: and judging whether the noise value of each operation point is in an area covered by a limit value according to the national occupational health standard, and if not, giving a sanitary working time limit.
The system provided by the embodiment is displayed and output in the form of graphs and images in the aspects of scene modeling, two-dimensional scenes and the like, and is more intuitive and truer; the method realizes the omnibearing noise analysis on the operation points inside and around the transformer substation in a point-surface combination mode; the assessment function of occupational health of the substation workplace is realized, and effective reference can be provided for power management personnel and technicians.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and it is apparent that 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 such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such 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.
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