CN109670257A - A kind of converter station sound field emulation mode and system - Google Patents
A kind of converter station sound field emulation mode and system Download PDFInfo
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Abstract
The invention discloses a kind of converter station sound field emulation mode and systems, include: that the noise signal obtained in converter station audible device preset time to be measured is acquired based on auditory localization extracting method, calculates the actual measurement sound pressure level for obtaining the audible device pre-position to be measured；The audible device to be measured is modeled by noise prediction software；Preset the acoustical power of the audible device to be measured；Emulation obtains the emulation sound pressure level in predetermined position described in the audible device to be measured；The difference of computer sim- ulation sound pressure level and actual measurement sound pressure level；Difference meets the default condition of convergence and then completes sound field emulation；Difference does not meet the default condition of convergence, then adjusts the acoustical power of the audible device to be measured；True value assignment to model is subjected to sound field emulation.The accuracy of converter station sound field emulation can be improved in the present invention, can be applied to the exceeded divisions of responsibility of noise and noise management solution verifying of ultra-high voltage converter station etc..
Description
Technical field
The invention belongs to substation's noise testing and sound field simulation technical field, in particular to a kind of converter station sound field emulation
Method and system.
Background technique
Extra-high voltage direct-current transmission has the characteristics that conveying distance is remote, capacity is big and voltage class is high, it can be achieved that electric energy
A wide range of transmission.It builds up and puts into operation successively with multinomial extra-high voltage direct-current transmission engineering, noise problem is also increasingly prominent.Extra-high voltage
The common noise source of converter station mainly has: the change of current becomes, gets in touch with change, bus highly resistance, route highly resistance, alternating current filter, DC filtering
Device, smoothing reactor, cooling tower and high-altitude corona noise etc., compared to Exchange Station, presentation audible device is more, individual equipment sound function
The features such as rate is big and acoustic environment is more complicated, this builds the sound field emulation technology of ultra-high voltage converter station as extra-high voltage direct-current
If urgent problem to be solved.
At present during simulation calculation, an area source of sound is provided generally according to filter occupied area, modeling accuracy is not
It is high；At the partial region or part monitoring point of converter station factory circle, noise prediction and measured value deviation up to 5-10dB, error compared with
Greatly.Rely on single microphone measurement that can not accurately obtain the noise source strength of ultra-high voltage converter station, sound source parameter there is no in simulations
Efficacious prescriptions method determines that Simulation Science is to be improved.
Summary of the invention
The purpose of the present invention is to provide a kind of converter station sound field emulation mode and systems, to solve ultra-high voltage converter station sound
Field simulation parameter is difficult to determining problem.The accuracy of ultra-high voltage converter station sound field emulation can be improved in the present invention, can be applied to change
Flow the exceeded divisions of responsibility of noise and the noise management solution verifying etc. at station.
In order to achieve the above objectives, the invention adopts the following technical scheme:
A kind of converter station sound field emulation mode, comprising the following steps:
The noise signal in converter station audible device preset time to be measured is acquired, is calculated according to the noise signal and obtains institute
State the actual measurement sound pressure level of audible device pre-position to be measured；
The audible device to be measured is modeled by noise prediction software；
According to the model of the audible device to be measured of acquisition, the acoustical power of the audible device to be measured is preset；
Emulation obtains the emulation sound pressure level in predetermined position described in the audible device to be measured in noise prediction software；
The difference of computer sim- ulation sound pressure level and actual measurement sound pressure level；Difference then thinks identified preset value within a preset range
For true value, difference does not meet the default condition of convergence, then adjusts the acoustical power of the audible device to be measured；
The true value of acquisition is assigned to the model established and carries out sound field emulation, calculates sound field cloud atlas.
Further, converter station audible device to be measured includes: that the change of current becomes, contact change, route highly resistance, bus highly resistance, filters
One or more of Capacitor stack, filter reactor, smoothing reactor, line corona and hardware corona.
Further, auditory localization extracting method includes near field acoustic holography method or Beamforming Method, is specifically included: being passed through
The acquisition of auditory localization extraction element obtains the noise signal in audible device preset time to be measured, calculates and obtains the sounding to be measured
Z weighted frequency spectrum in the actual measurement sound pressure level and preset range of equipment pre-position.
Further, the actual measurement sound pressure level of pre-position is onto any plane within 1 meter of audible device surface to be measured
Sound pressure level, the Z weighted frequency spectrum in preset range is 100Hz-3150Hz noise signal.
Further, in soundPLAN, the change of current become, contact change, route highly resistance, bus highly resistance, filter condenser tower,
One of filter reactor and smoothing reactor a variety of are modeled according to industrial building；Line corona is according to there is limit for length's line
Sound source modeling；Hardware corona is modeled according to point sound source.
Further, expression formula of the adjustment of acoustical power according to formula is preset are as follows: Lw=Lp+10lgS；Wherein, LwFor equipment
Acoustical power, unit dB, LpFor the pre-position sound pressure level measured, unit dB, S are enveloping surface area, unit m2。
Further, the audible device to be measured includes: filter reactor or smoothing reactor；Filter reactor or flat wave
Reactor is modeled with industrial building, sets suspension face for bottom surface, side and bottom surface acoustical power use auditory localization extracting method
It is individually determined.
Further, sound field phantom error is within 3dB.
Further, the preset condition of convergence is that difference is less than or equal to 1dB (A).
A kind of converter station sound field analogue system, comprising:
Sound pressure level surveys unit, for acquiring the noise signal in converter station audible device preset time to be measured, according to institute
It states noise signal and calculates the actual measurement sound pressure level for obtaining the audible device pre-position to be measured；
Sound pressure level modeling and simulating unit, for being modeled by noise prediction software to the audible device to be measured, root
According to the model of the audible device to be measured of acquisition, the acoustical power of the audible device to be measured is preset, is emulated in noise prediction software
Obtain the emulation sound pressure level in predetermined position described in the audible device to be measured；
Compare feedback unit, the difference for computer sim- ulation sound pressure level and actual measurement sound pressure level；Difference is within a preset range then
Preset value determined by thinking is true value, and difference does not meet the default condition of convergence, then adjusts the sound of the audible device to be measured
Power；The true value of acquisition is assigned to the model development sound field established to emulate and calculate sound field cloud atlas.
Compared with prior art, the invention has the following advantages:
Emulation mode of the invention is based on auditory localization extractive technique, and the sound function of equipment is calculated by the sound pressure level of actual measurement
Rate can solve the problems, such as converter station sound source assignment inaccuracy；By emulation sound pressure level compared with surveying sound pressure level, pass through default convergence
Condition adjusts sound field emulation, and the accuracy of sound field emulation can further be turned up.Present invention can apply to making an uproar for ultra-high voltage converter station
The exceeded divisions of responsibility of sound, noise management solution verifying etc. are practical to engineering to have certain guidance meaning.
Further, it is measured compared to traditional single microphone, what the present invention directly measured is sound at 1 meter of sound source surface
Pressure value, rather than the sound pressure level at the place of the sonic transducer far from equipment, may make that simulation calculation is more accurate, sound source assignment is more
Science.
Further, unified method is had no in the modeling of extra-high voltage direct-current substation sound field at present, according to simulation accuracy
It needs, converter power transformer is generally defined as point sound source/area source of sound, filter group is integrally defined as point source or by filter capacitor
Device is positioned as line source, and filter reactor is integrally positioned as point source.These modeling methods have all done actual conditions more rough
It is assumed that being unable to satisfy the requirement of High Precision Simulation.The present invention is based on the positioning to sound source to extract as a result, according to the hair of audible device
Sound characteristics and its sounding size are modeled, and simulation accuracy can be improved, and simulation result can more really react extra-high voltage converter
It stands sound-filed simulation.
Further, the present invention is built according to point sound source, finite length line sound source and industry respectively according to audible device size
It builds and establishes model in soundPLAN, modeling accuracy is higher.
Further, the accuracy of sound field emulation can be adjusted as needed by the preset condition of convergence.
Detailed description of the invention
Fig. 1 is a kind of schematic process flow diagram of converter station sound field emulation mode of the embodiment of the present invention.
Specific embodiment
Invention is further described in detail in the following with reference to the drawings and specific embodiments.
It is specially a kind of to be extracted based on auditory localization referring to Fig. 1, a kind of converter station sound field emulation mode of the invention
Ultra-high voltage converter station sound field emulation mode mainly includes that noise source positioning is extracted, and the main audible device of converter station is modeled and set
Journey is pushed through for acoustical power is counter, specifically includes the following steps:
Step 1: being based on auditory localization extractive technique, measure sound pressure level and its Z weighted 100Hz- at 1 meter of audible device surface
3150Hz noise spectrum.In view of extra-high voltage converter station equipment arrangement mostly keeps enough distances, and according to point/line/face sound
Source in air in attenuation characteristic, other equipment noise had greater attenuation when being transferred at 1 meter of a certain equipment surface, because
This can ignore contribution of the other equipment at this, it is believed that acoustic pressure is only caused by the noise of equipment at 1 meter of equipment surface.
Noise source positioning, which is extracted, relies near field acoustic holography method or Beamforming Method, and setting tested surface is 1 meter of equipment surface
Place, by more microphone data processings, accurately measures the sound pressure level and its spectrum distribution at this.Specifically, common noise
Source positioning extracting method mainly has near field acoustic holography method and Beamforming Method.Wherein Nearfield acoustic holography is in close proximity to tested sound
Its multiple acoustic pressure or particle vibration velocity are measured in the measuring surface on source surface, and spatial sound field transformation is recycled to reconstruct sound source three-dimensional space
Sonic pressure field, vibration velocity field and sound intensity vector field and the directive property that can forecast far field.Beamforming Method is fixed using one group in space
The array for the microphone composition being distributed on position measures space sound field, and the output of microphone each on array is passed through
The processing such as weighting, delay, summation, enhance the useful signal of specific direction, weaken the interference signal on other directions, form space
Directive property, and available detailed sound source information.Scene should in equipment sounding stable, measure field wind speed be less than 5m/s,
It is measured in the case where no sleet, is directed at Devices to test using auditory localization extraction element, acquires the noise in a period of time
Signal is analyzed by more microphone signals, counter to shift sound pressure level and its 100Hz-3150HzZ weighted frequency spectrum at 1 meter of equipment surface onto.
Step 2: being built respectively according to point sound source, finite length line sound source, industry according to ultra-high voltage converter station audible device size
It builds and establishes model in soundPLAN7.4 respectively；Industrial building is that the limited big area source of sound of multiple independences is constituted.
The main audible device modeling of converter station becomes the change of current, contact becomes, route according to the phonation characteristics of change of current station equipment
Highly resistance, bus highly resistance, filter condenser tower, filter reactor and smoothing reactor are modeled according to industrial building, by line electricity
It is dizzy to be modeled according to finite length line sound source, hardware corona is modeled according to point sound source.Mainly there is mangneto to stretch specifically, the change of current becomes noise
Contract the low-frequency noise and noise of axial flow fan caused.In view of the converter station capital construction phase can become installation acoustic hood all generally for the change of current,
Exposure radiated noise outside in air in air draft side is only forced after building up, therefore is modeled with industrial building, but is only assigned in exposure
Value, noise of axial flow fan corresponding position can be indicated in exposure in the form of point sound source.Contact change, highly resistance and Exchange Station situation class
Seemingly, it is indicated with industrial building.
Filter condenser tower noise band is wide, and sounding is strong, is the Main Noise Sources of ultra-high voltage converter station.For single electricity
Container, bottom surface noise level is higher than side, and Capacitor stack is generally piled up by single capacitor according to top surface relative mode,
The intensity of phonation of ipsilateral does not have bigger difference, therefore models according to industrial building, and the acoustical power of ipsilateral is not fixed using sound source
Position extractive technique is individually determined.Filter reactor and smoothing reactor are generally used dry-type air-core reactor, and cylinder type designs,
Several encapsulatings are inside set, noise is uniformly distributed along the circle of barrel one, and bottom surface noise is higher than side.It is modeled with industrial building, bottom surface is set
The suspension face of being set to.Side and bottom surface acoustical power are individually determined using auditory localization extractive technique.Corona point exists certain
Randomness, but the discharge scenario in a period of time is counted, for the conducting wire of comprehensive bloom, noise, which is presented, uniformly limit for length
Line source characteristic.The parameters such as sound source length, distance away the ground are arranged according to the conducting wire of practical bloom in simulations, and sound power value is by making an uproar
Acoustic pressure is back-calculated to obtain at 1 meter of the surface that acoustic fix ranging extraction system obtains.The size of fitting can be according to list for whole station
A point processing, therefore hardware corona can be handled according to point sound source, acoustical power is determined using auditory localization extractive technique.
Step 3: default acoustical power.
Acoustical power is counter to be pushed away for point sound source, the method that can be calculated using numerical value, according to Lw=Lp+ 11 calculate, for limited
Each face of long line source and its industrial building, a default acoustical power make sound at 1 meter of surface by adjusting sound power value
Pressure value is identical as measured value, it is believed that sound power value at this time is the true acoustical power of equipment, achievees the purpose that counter to push away acoustical power.
By the surveyed sound pressure level of step 1 and noise spectrum, acoustical power can be calculated according to sound aerial decay formula for point sound source
And its frequency spectrum can be first according to the 100Hz-3150HzZ weighted noise frequency measured for finite length line sound source and industrial building
Spectrum, estimates the identical acoustical power of a spectrum component, brings step 2 model built into and carries out realistically displayed.
Specifically, there is following relationship between sound pressure level and acoustic power level:
Lw=Lp+10lgS
Wherein LwFor equipment acoustical power, unit dB, LpFor the pre-position sound pressure level measured, unit dB, S represent packet
The area of network sound source, unit m2。
The formula can be applied to the calculating of point sound source acoustical power, can also be applied to the acoustical power of finite length line sound source and industrial building
It estimates and adjusts.
(1) point sound source acoustical power calculates；When sound source is the point sound sources such as hardware corona, sound source is located at high-altitude, it is believed that is
Free field, it may be assumed that
Lw=Lp+20lgr+11
Wherein, r is distance of the sound source to measuring point, unit m.
Since sound pressure level is acoustic pressure at 1 meter of sound source surface, the relationship between point sound source acoustic pressure and acoustical power can further letter
It turns to:
Lw=Lp+11；
Therefore, the acoustical power of hardware corona and conductor corona is represented by Lw=Lp+11。
(2) finite length line sound source and industrial building acoustical power initial value design:
Lw=Lp+10lgS
Wherein LwFor equipment acoustical power, unit dB, LpFor the pre-position sound pressure level measured, unit dB, S represent packet
The area of network sound source, unit m2。
Show that the difference between acoustical power and sound pressure level does not change with frequency, that is, it, be in actual measurement sound when estimating sound power value
On the basis of pressure value spectrum component, identical value should be superimposed at different spectral, to guarantee the corresponding relationship of noise spectrum.
Step 4: verification acoustical power；By numerical value calculate or iteration method, control 1 meter of equipment surface at sound pressure level and
Its frequency spectrum is identical as measured value, determines therefrom that ultra-high voltage converter station individual equipment acoustical power；Acoustical power is brought into above-mentioned model to imitate
It is true to calculate ultra-high voltage converter station sound-filed simulation.
Examine in emulation whether acoustic pressure is consistent with sound pressure level at 1 meter of equipment surface of actual measurement at 1 meter of equipment surface, if being unsatisfactory for
The condition of convergence then continues to adjust sound source acoustical power, and until identical as measured value, the acoustical power set at this time is regarded as this and sets
Standby accurate acoustical power.In step 4, come when determining acoustical power by the way of iterative calculation, it is contemplated that in air acoustical power with
There are following relationships for sound pressure level: Lw=Lp+ 10lgS, it is seen that the difference between acoustical power and sound pressure level does not change with frequency, therefore
When step 4 adjusts sound power value, should be superimposed at different spectral identical on the basis of surveying sound pressure level spectrum component
Value, realizes the adjustment of sound power value.Specifically, due to acoustic pressure L at 1 meter of Acoustic exposure face size and surfacepAll it has been determined that sound function
Rate existence and unique solution.Increase or reduction sound power value are realized by increasing identical value to each frequency spectrum of acoustical power, it is final to realize
Acoustic pressure predicted value matches with measured value at 1 meter of surface, determines the sound function in finite length line sound source or industrial building one side
Rate value.To everywhere point sound source, finite length line sound source and industrial building, each face carries out realistically displayed respectively, final to obtain entirely
The accurate sound power value of portion's sound source and its spectrum distribution finally bring acoustical power into step 2 model built simulation calculation extra-high voltage
Converter station sound-filed simulation.
Step 5, referring to step 3 and step 4, to each face of everywhere point sound source, finite length line sound source and industrial building
Realistically displayed is carried out respectively, is obtained accurate noise source sound power value and its spectrum distribution, is finally emulated using the model
It calculates.
A kind of converter station sound field analogue system of the invention, comprising: sound pressure level surveys unit, sets for obtaining sounding to be measured
The actual measurement sound pressure level of standby pre-position；Sound pressure level modeling and simulating unit, for converter station audible device to be measured to be modeled and imitated
Really obtain the emulation sound pressure level in the predetermined position；Compare feedback unit, obtains actual measurement sound pressure level and emulation acoustic pressure for comparing
It is worth and feeds back the two difference.Analogue system through the invention can be realized emulation mode of the invention.
To sum up, when carrying out converter station sound field simulation calculation at present, exchanging area high-altitude corona noise is unable to measure, and cannot be provided
Accurate corona noise sound source size；The influence of corona noise is not considered in simulation process；Filter field inner capacitor, reactance
Device equipment is various, and sound source size and frequency are different, cannot carry out sound source test to single device；In simulation calculation process
In, an area source of sound is provided generally according to filter occupied area, modeling accuracy is not high；Converter station factory circle partial region or
At the monitoring point of part, up to 5-10dB, error is larger for noise prediction and measured value deviation.In general, single microphone is relied on to survey
Amount can not accurately obtain the noise source strength of ultra-high voltage converter station, and sound source parameter there is no effective ways to determine in simulations, emulation section
The property learned is to be improved.The present invention applies noise source positioning extractive technique in the emulation of ultra-high voltage converter station sound field, solves sound
The problem of source assignment inaccuracy, improves simulation accuracy, while according to the main equipment types of ultra-high voltage converter station, proposes pair
The modeling method answered provides completely new technological means for the emulation of extra-high voltage converter sound field.The present invention solves extra-high voltage converter
Simulation parameter of standing is difficult to determining problem, can control within 3dB sound field phantom error using this method, improve sound field
Accuracy of simulation and science can be applied to the exceeded divisions of responsibility of noise, noise management solution verifying of ultra-high voltage converter station etc.
Aspect is practical to engineering to have certain guidance meaning.
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art,
It can still modify to technical solution documented by previous embodiment, or be equal to part of technical characteristic
Replacement, for all spirit invented in fact at this within principle, any modification, equivalent replacement, improvement and so on should be included in this
Within the protection scope of invention.
It should be understood by those skilled in the art that, embodiments herein can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the application, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, although referring to above-described embodiment pair
The present invention is described in detail, those of ordinary skill in the art still can to a specific embodiment of the invention into
Row modification perhaps equivalent replacement these without departing from any modification of spirit and scope of the invention or equivalent replacement, applying
Within pending claims of the invention.
Claims (10)
1. a kind of converter station sound field emulation mode, which comprises the following steps:
Acquire the noise signal in converter station audible device preset time to be measured, calculated according to the noise signal obtain it is described to
Survey the actual measurement sound pressure level of audible device pre-position；
The audible device to be measured is modeled by noise prediction software；According to the model of the audible device to be measured of acquisition,
Preset the acoustical power of the audible device to be measured；Emulation obtains and makes a reservation for described in the audible device to be measured in noise prediction software
The emulation sound pressure level of position；
The difference of computer sim- ulation sound pressure level and actual measurement sound pressure level；Difference then thinks that identified preset value is true within a preset range
Real value, difference do not meet the default condition of convergence, then adjust the acoustical power of the audible device to be measured；
The true value of acquisition is assigned to the model established and carries out sound field emulation, calculates sound field cloud atlas.
2. a kind of converter station sound field emulation mode according to claim 1, which is characterized in that converter station audible device to be measured
Including at least one of following: the change of current become, contact change, route highly resistance, bus highly resistance, filter condenser tower, filter reactor,
Smoothing reactor, line corona and hardware corona.
3. a kind of converter station sound field emulation mode according to claim 1, which is characterized in that auditory localization extracting method packet
Near field acoustic holography method or Beamforming Method are included, is specifically included:
The noise signal in audible device preset time to be measured is obtained by the acquisition of auditory localization extraction element, is calculated described in obtaining
Z weighted frequency spectrum in the actual measurement sound pressure level and preset range of audible device pre-position to be measured.
4. a kind of converter station sound field emulation mode according to claim 3, which is characterized in that the actual measurement sound of pre-position
Pressure value is that the Z weighted frequency spectrum to the sound pressure level in any plane within 1 meter of audible device surface to be measured, in preset range is
100Hz-3150Hz noise signal.
5. a kind of converter station sound field emulation mode according to claim 2, which is characterized in that in soundPLAN, the change of current
Become, contact change, one of route highly resistance, bus highly resistance, filter condenser tower, filter reactor and smoothing reactor or more
Kind is modeled according to industrial building；Line corona is modeled according to finite length line sound source；Hardware corona is modeled according to point sound source.
6. a kind of converter station sound field emulation mode according to claim 1, which is characterized in that the adjustment of default acoustical power according to
According to the expression formula of formula are as follows: Lw=Lp+10lgS；Wherein, LwFor equipment acoustical power, unit dB, LpFor the predetermined position measured
Locate sound pressure level, unit dB, S are enveloping surface area, unit m2。
7. a kind of converter station sound field emulation mode according to claim 1, which is characterized in that the audible device packet to be measured
It includes: filter reactor or smoothing reactor；Filter reactor or smoothing reactor are modeled with industrial building, set outstanding for bottom surface
Surface, side and bottom surface acoustical power are individually determined using auditory localization extracting method.
8. a kind of converter station sound field emulation mode according to claim 1, which is characterized in that sound field phantom error is in 3dB
Within.
9. a kind of converter station sound field emulation mode according to any one of claim 1 to 8, which is characterized in that preset
The condition of convergence is that difference is less than or equal to 1dB (A).
10. a kind of converter station sound field analogue system, which is characterized in that based on emulation side described in any one of claims 1 to 9
Method, comprising:
Sound pressure level actual measurement unit is made an uproar for acquiring the noise signal in converter station audible device preset time to be measured according to described
Acoustical signal calculates the actual measurement sound pressure level for obtaining the audible device pre-position to be measured；
Sound pressure level modeling and simulating unit, for being modeled by noise prediction software to the audible device to be measured, according to obtaining
The model of the audible device to be measured obtained, presets the acoustical power of the audible device to be measured, emulates and obtains in noise prediction software
The emulation sound pressure level in predetermined position described in the audible device to be measured；
Compare feedback unit, the difference for computer sim- ulation sound pressure level and actual measurement sound pressure level；Difference then thinks within a preset range
Identified preset value is true value, and difference does not meet the default condition of convergence, then adjusts the acoustical power of the audible device to be measured；
The true value of acquisition is assigned to the model development sound field established to emulate and calculate sound field cloud atlas.
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| CN110600044A (en) * | 2019-06-24 | 2019-12-20 | 中国电力科学研究院有限公司 | Method and system for identifying noise of main sound source in converter station |
| CN111261188A (en) * | 2020-01-20 | 2020-06-09 | 中国电力科学研究院有限公司 | High-voltage transformer noise spectrum determination method and device |
| CN111985113A (en) * | 2020-08-28 | 2020-11-24 | 国网青海省电力公司电力科学研究院 | Method and device for predicting noise of power transmission line |
| CN112466627A (en) * | 2020-11-11 | 2021-03-09 | 西安西电变压器有限责任公司 | Design method and system of transformer oil tank and transformer oil tank |
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| CN111261188B (en) * | 2020-01-20 | 2022-10-18 | 中国电力科学研究院有限公司 | Method and device for determining noise frequency spectrum of high-voltage transformer |
| CN111985113A (en) * | 2020-08-28 | 2020-11-24 | 国网青海省电力公司电力科学研究院 | Method and device for predicting noise of power transmission line |
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