CN110567576B - Method and device for determining reason for standard exceeding of factory boundary noise of transformer substation - Google Patents
Method and device for determining reason for standard exceeding of factory boundary noise of transformer substation Download PDFInfo
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- CN110567576B CN110567576B CN201910859614.8A CN201910859614A CN110567576B CN 110567576 B CN110567576 B CN 110567576B CN 201910859614 A CN201910859614 A CN 201910859614A CN 110567576 B CN110567576 B CN 110567576B
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Abstract
The invention discloses a method for determining the reason that the factory boundary noise of a transformer substation exceeds standard, which comprises the following steps: dividing a noise source of a transformer substation into main equipment noise and hardware corona noise; measuring the factory boundary noise around the transformer substation, and determining the range of the overproof factory boundary noise of the transformer substation; recording the position of a measuring point and the actually measured noise sound pressure level value in the range that the transformer substation boundary noise exceeds the standard; obtaining the sound power of the main equipment by adopting a sound pressure method; calculating to obtain a noise sound pressure calculation value of a monitoring point with the same position as the measuring point by adopting the actually measured sound power of the main equipment; and comparing the actually measured noise sound pressure value with the noise sound pressure calculation value to obtain a difference value between the actually measured noise sound pressure value and the noise sound pressure calculation value, and determining the reason of the exceeding of the transformer substation boundary noise according to the difference value to make up for the reason of the exceeding of the transformer substation noise which is determined by lacking a related method at present.
Description
Technical Field
The application relates to the field of power grid environment protection, in particular to a method for determining a cause of overproof noise of a transformer substation boundary, and also relates to a device for determining a cause of overproof noise of a transformer substation boundary.
Background
The noise of the transformer substation is an important factor influencing the construction of the transformer substation, the transformer substation which originally reaches the standard becomes a station with excessive noise due to the aging of main equipment, hardware fittings and other equipment of the transformer substation with longer operation life, in order to enable the noise of the transformer substation boundary to reach the standard, the noise of the transformer substation must be controlled, and before the noise is controlled, the main reason of the excessive noise of the transformer substation needs to be known, so that a noise exceeding control scheme can be provided more specifically. However, due to the fact that the noise sources in the transformer substation are numerous, each sound source is overlapped with the other, and refraction, reflection and interference effects are added, a correlation method for distinguishing the noise of the transformer substation boundary mainly from the equipment is lacked at present, and the reason for exceeding the standard of the noise is further determined.
Disclosure of Invention
The method for determining the reason for the overproof of the transformer substation boundary noise finally determines the reason for the overproof of the transformer substation noise by analyzing the contribution of each noise source to the noise of the transformer substation boundary, and solves the problem that the existing method is lack of a relevant method for determining the reason for the overproof of the transformer substation noise.
The application provides a method for determining a cause of exceeding standard of noise of a transformer substation boundary, which comprises the following steps:
dividing a noise source of a transformer substation into main equipment noise and hardware corona noise;
measuring the factory boundary noise around the transformer substation, and determining the range of the overproof factory boundary noise of the transformer substation; recording the position of a measuring point and the sound pressure level value of actually measured noise within the range that the noise of the transformer substation boundary exceeds the standard;
obtaining the sound power of the main equipment by adopting a sound pressure method, and calculating and obtaining a noise sound pressure calculation value of a monitoring point at the same position as the measuring point according to the sound power of the main equipment;
and comparing the actually measured noise sound pressure value with the noise sound pressure calculated value to obtain a difference value of the actually measured noise sound pressure value and the noise sound pressure calculated value, and determining the reason that the factory boundary noise of the transformer substation exceeds the standard according to the difference value.
Preferably, the master device noise includes: main transformer noise and high noise resistance.
Preferably, in the range that the substation boundary noise exceeds the standard, recording the position of the measuring point and the sound pressure level value of the actually measured noise, including:
selecting a plurality of measuring points in the range that the noise of the transformer substation boundary exceeds the standard;
recording the position of the measuring point and the sound pressure level value L of the actually measured noise n 。
Preferably, the obtaining of the sound power of the main device by using a sound pressure method includes:
measuring the sound power level of the main equipment by adopting a sound pressure method to respectively obtain the sound power W of the main equipment n N =1,2,3, \ 8230denotes the number of different masters.
Preferably, the calculating to obtain the calculated value of the sound pressure of the noise at the monitoring point at the same position as the measuring point includes:
will depend on the acoustic power W of the master device n Adopting ISO9613-2:1996 calculation method for outdoor sound propagation attenuation calculates to obtain a noise sound pressure calculation value L of a monitoring point which does not comprise hardware corona noise and has the same position as the measuring point c 。
Preferably, the actually measured noise sound pressure value is compared with a noise sound pressure calculation value to obtain a difference value between the actually measured noise sound pressure value and the noise sound pressure calculation value, and the reason why the transformer substation boundary noise exceeds the standard is determined according to the difference value;
comparing the actually measured noise sound pressure value and the noise sound pressure calculated value at the same position of the transformer substation to obtain a difference value L between the actually measured value and the calculated value p ＝L n -L c ；
When L is p >At 5dB, confirming that the over-standard reason of the factory boundary noise at the position is hardwareCaused by corona noise;
when L is p <And at 5dB, confirming that the overproof cause of the factory boundary noise at the position is caused by the noise of the main equipment.
Preferably, the method further comprises the following steps:
when L is p >When 5dB is reached, the corona noise of the hardware which causes the factory boundary noise to exceed the standard is treated;
when L is p <And 5dB, performing noise reduction processing on the main equipment noise causing the exceeding of the factory boundary noise.
Correspondingly, the application also provides a device for determining the reason that the noise of the transformer substation boundary exceeds the standard, which is characterized by comprising:
the system comprises a noise source dividing unit, a control unit and a control unit, wherein the noise source dividing unit is used for dividing a noise source of a transformer substation into main equipment noise and hardware corona noise;
the device comprises an actually measured noise sound pressure level value determining unit, a processing unit and a control unit, wherein the actually measured noise sound pressure level value determining unit is used for measuring the plant boundary noise around the transformer substation and determining the range of the standard exceeding of the plant boundary noise of the transformer substation; recording the position of a measuring point and the sound pressure level value of actually measured noise within the range that the noise of the transformer substation boundary exceeds the standard;
the noise sound pressure calculation value acquisition unit is used for acquiring the sound power of the main equipment by adopting a sound pressure method and calculating and acquiring a noise sound pressure calculation value of a monitoring point at the same position as the measuring point according to the sound power of the main equipment;
and the overproof reason determining unit is used for comparing the actually measured noise sound pressure value with the noise sound pressure calculation value to obtain a difference value of the actually measured noise sound pressure value and the noise sound pressure calculation value, and determining the reason of the overproof of the transformer substation boundary noise according to the difference value.
Preferably, the measured noise sound pressure level value determination unit includes:
the measuring point selecting subunit is used for selecting a plurality of measuring points in the range of the standard exceeding of the substation boundary noise;
a recording subunit for recording the sound pressure level value L of the measured noise and the position of the measured point n 。
Preferably, the noise sound pressure calculation value acquisition unit includes:
a noise sound pressure calculation value acquisition subunit for acquiring the sound power W of the main device n Adopting ISO9613-2:1996 calculation method for outdoor Acoustic propagation attenuation to obtain calculated value L of noise sound pressure of monitoring point with same position as measuring point and without hardware Corona noise c 。
Preferably, the superscalar cause determining unit includes:
a difference obtaining subunit, configured to compare the actually measured noise sound pressure value and the noise sound pressure calculated value at the same position of the substation, and obtain a difference L between the actually measured value and the calculated value p ＝L n -L c ；
A superstandard cause determining subunit, when L p >When the noise is 5dB, determining that the reason for the overproof of the factory boundary noise at the position is caused by corona noise of the hardware fitting;
a superstandard cause determining subunit, when L p <And at 5dB, confirming that the overproof cause of the factory boundary noise at the position is caused by the noise of the main equipment.
The method comprises the steps of measuring the plant noise around a transformer substation to obtain a measuring point position and an actually measured noise sound pressure value, then obtaining a noise sound pressure calculation value of a monitoring point which is the same as the measuring point position through calculation, comparing the actually measured noise sound pressure value with the noise sound pressure calculation value to obtain a difference value of the actually measured noise sound pressure value and the noise sound pressure calculation value, determining the reason that the plant noise of the transformer substation exceeds the standard according to the difference value, and making up the reason that the noise of the transformer substation is determined to exceed the standard due to the lack of a related method at present.
Drawings
Fig. 1 is a schematic flowchart of a method for determining a cause of exceeding a standard of a substation boundary noise according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a transformer substation noise overproof reason analysis process according to an embodiment of the present application;
FIG. 3 shows a calculated value and an actual value of noise of a certain substation;
fig. 4 is a schematic diagram of a device for determining a cause of exceeding standard noise of a substation boundary according to an embodiment of the present application.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of implementation in many different ways than those herein set forth and of similar import by those skilled in the art without departing from the spirit and scope of this application, and thus this application is not limited to the specific implementations disclosed below.
Fig. 1 is a schematic flow chart of a method for determining a cause of exceeding the standard of the transformer substation boundary noise provided in the embodiment of the present application, and the method provided in the embodiment of the present application is described in detail below with reference to fig. 1.
Step S101, dividing a noise source of the transformer substation into main equipment noise and hardware corona noise.
Dividing the noise source of the transformer substation into 2 classes, namely main equipment noise, including: main transformer noise and high noise resistance; second, metal corona noise.
Step S102, measuring the factory boundary noise around the transformer substation, and determining the range of the overproof factory boundary noise of the transformer substation; and recording the position of a measuring point and the sound pressure level value of actually measured noise in the range of the standard exceeding of the substation boundary noise.
Measuring the factory boundary noise around the periphery of the transformer substation, determining the range of the exceeding of the factory boundary noise of the transformer substation, simultaneously testing at least 5 points in the range of the exceeding of the factory boundary noise in order to reduce the dispersity of the noise, and recording the positions of the measuring points and the actually-measured noise sound pressure level value L n 。
And S103, obtaining the sound power of the main equipment by adopting a sound pressure method, and calculating and obtaining a noise sound pressure calculation value of the monitoring point with the same position as the measuring point according to the sound power of the main equipment.
Measuring the sound power level of the main equipment by adopting a sound pressure method, and respectively obtaining the sound power W of the main equipment n N =1,2,3, \ 8230denotes the number of different masters. The actual sound source parameters of the hardware cannot be determined due to the fact that the randomness of the positions and the sizes of the corona noises of the hardware is large, and therefore the hardware is not tested.
Will depend on the acoustic power W of the master device n Adopting ISO9613-2:1996 calculation method for outdoor Acoustic propagation attenuation to obtain calculated value L of noise sound pressure of monitoring point with same position as measuring point and without hardware Corona noise c 。
And step S104, comparing the actually measured noise sound pressure value with a noise sound pressure calculated value to obtain a difference value of the actually measured noise sound pressure value and the noise sound pressure calculated value, and determining the reason of the overproof substation boundary noise according to the difference value.
Comparing the actually measured noise sound pressure value and the calculated noise sound pressure value at the same position outside the enclosure wall of the transformer substation to obtain the difference value L between the actually measured value and the calculated value p ＝L n -L c ；
Because the noise of the corona hardware on the charged framework is not considered, on the basis of considering the test error and the calculation error, when L is equal to L p >And 5dB, determining that the reason for the standard exceeding of the factory boundary noise at the position is caused by the corona noise of the hardware, and treating the corona noise of the hardware causing the standard exceeding of the factory boundary noise. When L is p <And when the noise is 5dB, the factory boundary noise at the position is considered to be smaller by the corona noise of the charged framework hardware, and the overproof reason of the factory boundary noise at the position is determined to be caused by the noise of the main equipment, so that the noise of the main equipment causing the overproof factory boundary noise needs to be subjected to noise reduction treatment.
The analysis process of the transformer substation noise exceeding reason is shown in fig. 2, firstly, a noise source in the transformer substation is divided into main equipment noise and hardware corona noise, then, the sound power level of main noise source equipment of the transformer substation is measured and calculated, actually measured equipment sound power parameters are adopted, a calculation value of the sound pressure level of the factory boundary noise at the position of an actually measured point is calculated, the actually measured sound pressure value of the factory boundary noise is compared with the calculation value of the sound pressure value of the factory boundary noise, the reason that the transformer substation noise exceeds the standard is analyzed according to the comparison result, and then a corresponding noise control method is adopted.
The method for determining the reason for the standard exceeding of the transformer substation boundary noise provided by the application is described below through a specific embodiment.
The reason for the overproof factory noise of the 500kV double-river transformer substation is analyzed by the method, and fig. 3 shows that the Lp difference of most measuring points is within 5dB (A) as the calculated values and the measured values of the factory noise measuring points, but the calculated values of the measuring points from 5 to 12 are obviously smaller than the measured values, and the maximum deviation reaches 11.7dB (A). Only the contribution value of the noise of the transformer and the reactor equipment is considered during calculation, and the corona noise of the power transformation framework is not considered, so that the main reason that the noise of the substation boundary exceeds the standard can be determined to be caused by hardware corona discharge on the power transformation framework which is closer to the substation boundary.
Corresponding to the method provided by the present application, the present application also provides a device 400 for determining a cause of exceeding standard noise in a transformer substation boundary, as shown in fig. 4, including:
a noise source dividing unit 410, configured to divide a noise source of the substation into main device noise and hardware corona noise;
the actually measured noise sound pressure level value determining unit 420 is configured to measure the plant boundary noise around the transformer substation and determine a range within which the plant boundary noise of the transformer substation exceeds the standard; recording the position of a measuring point and the sound pressure level value of actually measured noise within the range that the noise of the transformer substation boundary exceeds the standard;
a noise sound pressure calculation value obtaining unit 430, configured to obtain the sound power of the main device by using a sound pressure method, and calculate a noise sound pressure calculation value of a monitoring point at the same position as the measurement point according to the sound power of the main device;
and the overproof reason determining unit 440 is configured to compare the measured noise sound pressure value with a noise sound pressure calculated value, obtain a difference value between the measured noise sound pressure value and the noise sound pressure calculated value, and determine a reason for the overproof substation boundary noise according to the difference value.
Preferably, the measured noise sound pressure level value determination unit includes:
the measuring point selecting subunit is used for selecting a plurality of measuring points in the range of the standard exceeding of the substation boundary noise;
a recording subunit for recording the sound pressure level value L of the measured noise and the position of the measured point n 。
Preferably, the noise sound pressure calculation value acquisition unit includes:
a noise sound pressure calculation value acquisition subunit for acquiring the sound power W according to the main device n Adopting ISO9613-2:1996 calculation method for outdoor sound propagation attenuation calculates to obtain a noise sound pressure calculation value L of a monitoring point which does not comprise hardware corona noise and has the same position as the measuring point c 。
Preferably, the superscalar cause determining unit includes:
a difference value obtaining subunit, configured to compare the actually measured noise sound pressure value and the noise sound pressure calculated value at the same position of the substation, and obtain a difference value L between the actually measured value and the calculated value p ＝L n -L c ；
A superscalar cause determining subunit, when L p >When 5dB is reached, confirming that the reason of the exceeding standard of the factory boundary noise at the position is caused by corona noise of the hardware;
a superscalar cause determining subunit, when L p <And 5dB, confirming that the overproof reason of the factory boundary noise at the position is caused by the noise of the main equipment.
The method comprises the steps of measuring the noise of the boundary around the transformer substation to obtain a measuring point position and an actually measured noise sound pressure level value, then obtaining a noise sound pressure calculation value of a monitoring point with the same measuring point position through calculation, comparing the actually measured noise sound pressure value with the noise sound pressure calculation value to obtain a difference value of the actually measured noise sound pressure value and the noise sound pressure calculation value, determining the reason that the noise of the boundary of the transformer substation exceeds the standard according to the difference value, and then adopting a corresponding noise control method. The method makes up the reason that the noise of the transformer substation exceeds the standard due to the lack of a related method at present.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention.
Claims (9)
1. A method for determining the reason that the factory boundary noise of a transformer substation exceeds standard is characterized by comprising the following steps:
dividing a noise source of a transformer substation into main equipment noise and hardware corona noise;
measuring the factory boundary noise around the transformer substation, and determining the range of the overproof factory boundary noise of the transformer substation; recording the position of a measuring point and the actually measured noise sound pressure level value in the range that the transformer substation boundary noise exceeds the standard;
obtaining the actual sound power of the main equipment by adopting a sound pressure method, and calculating to obtain a noise sound pressure calculation value of a monitoring point at the same position as the measuring point according to the sound power of the main equipment;
comparing the actually measured noise sound pressure level value with a noise sound pressure calculated value to obtain a difference value of the actually measured noise sound pressure level value and the noise sound pressure calculated value, and determining the reason that the factory boundary noise of the transformer substation exceeds the standard according to the difference value, wherein the method comprises the following steps: comparing the actually measured noise sound pressure value and the noise sound pressure calculated value at the same position of the transformer substation to obtain the difference value between the actually measured value and the calculated valueL p =L n -L c (ii) a Because only the contribution value of the noise of the main equipment is considered in the calculation, the metal corona noise is not considered, and therefore, on the basis of considering the test error and the calculation error, when the noise of the main equipment is measuredL p >When 5dB is reached, confirming that the reason of the exceeding standard of the factory boundary noise at the position is caused by corona noise of the hardware; when in useL p <And 5dB, confirming that the overproof reason of the factory boundary noise at the position is caused by the noise of the main equipment.
2. The method of claim 1, wherein the master device noise comprises: main transformer noise and high noise resistance.
3. The method of claim 1, wherein recording the measurement point position and the measured noise sound pressure level value within the range of the substation boundary noise exceeding the standard comprises:
selecting a plurality of measuring points in the range of the standard exceeding of the substation boundary noise;
recording the position of the measuring point and the sound pressure level value of the actually measured noiseL n 。
4. The method of claim 1, wherein obtaining the acoustic power of the master device by using an acoustic pressure method comprises:
measuring the sound power level of the main equipment by adopting a sound pressure method to respectively obtain the sound power of the main equipmentW n N =1,2,3, \ 8230denotes the number of different masters.
5. The method according to claim 1 or 4, wherein the calculating to obtain the noise sound pressure calculation value of the monitoring point at the same position as the measurement point includes:
based on the acoustic power of the master deviceW n Adopting ISO9613-2:1996 calculation method for outdoor sound propagation attenuation calculates to obtain noise sound pressure calculation value of monitoring point not including hardware corona noise and having same position as the measuring pointL c 。
6. The method of claim 5, further comprising:
when in useL p >When the noise is 5dB, the corona noise of the hardware which causes the factory boundary noise to exceed the standard is treated;
when the temperature is higher than the set temperatureL p <And 5dB, performing noise reduction processing on the main equipment noise causing the exceeding of the factory boundary noise.
7. The utility model provides a confirm device of transformer substation factory boundary noise reason that exceeds standard which characterized in that includes:
the system comprises a noise source dividing unit, a processing unit and a control unit, wherein the noise source dividing unit is used for dividing a noise source of a transformer substation into main equipment noise and hardware corona noise;
the device comprises an actually measured noise sound pressure level value determining unit, a processing unit and a control unit, wherein the actually measured noise sound pressure level value determining unit is used for measuring the plant boundary noise around the transformer substation and determining the range of the standard exceeding of the plant boundary noise of the transformer substation; recording the position of a measuring point and the sound pressure level value of actually measured noise within the range that the noise of the transformer substation boundary exceeds the standard;
the noise sound pressure calculation value acquisition unit is used for acquiring the sound power of the main equipment by adopting a sound pressure method and calculating and acquiring a noise sound pressure calculation value of a monitoring point at the same position as the measuring point according to the sound power of the main equipment;
the overproof reason determining unit is configured to compare the actually measured noise sound pressure level value with a noise sound pressure calculated value, and obtain a difference between the actually measured noise sound pressure level value and the noise sound pressure calculated value, and includes: a difference obtaining subunit, configured to compare the actually measured noise sound pressure value and the noise sound pressure calculated value at the same position of the substation, and obtain a difference between the actually measured value and the calculated valueL p =L n -L c (ii) a The sub-unit is determined according to the overproof reason, only the contribution value of the noise of the main equipment is considered in the calculation process, and the metal corona noise is not considered, so that the sub-unit is determined according to the test error and the calculation errorL p >When 5dB is reached, confirming that the reason of the exceeding standard of the factory boundary noise at the position is caused by corona noise of the hardware; a superscalar cause determining subunit, whenL p <When 5dB is reached, the exceeding standard reason of the factory boundary noise at the position is confirmed to be caused by the noise of the main equipment; and determining the reason for the overproof substation boundary noise according to the difference.
8. The apparatus of claim 7, wherein the measured noise sound pressure level determination unit comprises:
the measuring point selecting subunit is used for selecting a plurality of measuring points in the range that the noise of the substation boundary exceeds the standard;
a measured noise sound pressure level value recording subunit for recording the measured point position and the measured noise sound pressure level valueL n 。
9. The apparatus according to claim 7, wherein the noise sound pressure calculation value acquisition unit includes:
a noise sound pressure calculation value acquisition subunit for acquiring the sound power of the main deviceW n Adopting ISO9613-2:1996 calculation method for outdoor Acoustic propagation attenuation to obtain calculated noise pressure value of monitoring point with same position as measuring point and without hardware Corona noiseL c 。
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