CN109670257B - Sound field simulation method and system for converter station - Google Patents
Sound field simulation method and system for converter station Download PDFInfo
- Publication number
- CN109670257B CN109670257B CN201811603366.2A CN201811603366A CN109670257B CN 109670257 B CN109670257 B CN 109670257B CN 201811603366 A CN201811603366 A CN 201811603366A CN 109670257 B CN109670257 B CN 109670257B
- Authority
- CN
- China
- Prior art keywords
- sound
- equipment
- preset
- tested
- pressure value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- Geometry (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention discloses a sound field simulation method and system for a converter station, comprising the following steps: acquiring noise signals within preset time of to-be-detected sound production equipment of a converter station based on a sound source positioning extraction method, and calculating and acquiring actual measurement sound pressure values at preset positions of the to-be-detected sound production equipment; modeling the sounding equipment to be tested through noise prediction software; presetting the sound power of the sound equipment to be tested; simulation sound pressure values of the preset positions of the sounding equipment to be tested are obtained through simulation; calculating the difference between the simulated sound pressure value and the actually measured sound pressure value; if the difference value meets a preset convergence condition, finishing sound field simulation; if the difference value does not meet the preset convergence condition, adjusting the sound power of the sound equipment to be tested; and assigning the true value to the model to perform sound field simulation. The invention can improve the accuracy of the sound field simulation of the converter station, and can be applied to the aspects of noise exceeding responsibility division, noise treatment scheme verification and the like of the extra-high voltage converter station.
Description
Technical Field
The invention belongs to the technical field of noise testing and sound field simulation of transformer substations, and particularly relates to a sound field simulation method and system of a converter station.
Background
The extra-high voltage direct current transmission has the characteristics of long transmission distance, large capacity, high voltage level and the like, and can realize large-scale transmission of electric energy. With the continuous construction and operation of a plurality of extra-high voltage direct current transmission projects, the noise problem of the extra-high voltage direct current transmission projects is increasingly prominent. Common noise sources for extra-high voltage converter stations are mainly: converter transformer, tie transformer, bus high reactance, line high reactance, alternating current filter, direct current filter, smoothing reactor, cooling tower, high altitude corona noise and the like, compared with an alternating current station, the characteristics of more sounding devices, high sound power of single device, more complex sound environment and the like are presented, and therefore the sound field simulation technology of the extra-high voltage converter station becomes the problem to be solved urgently in extra-high voltage direct current construction.
In the current simulation calculation process, a planar sound source is generally given according to the occupied area of a filter, and the modeling precision is not high; at partial areas or partial monitoring points of the factory boundary of the converter station, the deviation between the noise prediction and the actual measurement value can reach 5-10dB, and the error is larger. The noise source of the extra-high voltage converter station cannot be accurately obtained by means of single microphone measurement, sound source parameters are not determined by an effective method in simulation, and simulation scientificity is to be improved.
Disclosure of Invention
The invention aims to provide a sound field simulation method and system for a converter station, which are used for solving the problem that sound field simulation parameters of an extra-high voltage converter station are difficult to determine. The invention can improve the accuracy of the simulation of the sound field of the extra-high voltage converter station, and can be applied to the aspects of noise exceeding responsibility division, noise treatment scheme verification and the like of the converter station.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a sound field simulation method of a converter station comprises the following steps:
collecting noise signals of the to-be-tested sound production equipment of the converter station within a preset time, and calculating and obtaining an actual measurement sound pressure value at a preset position of the to-be-tested sound production equipment according to the noise signals;
modeling the sounding equipment to be tested through noise prediction software;
presetting the sound power of the sound equipment to be tested according to the obtained model of the sound equipment to be tested;
simulation sound pressure values of the preset positions of the sounding equipment to be detected are obtained in a simulation mode in noise prediction software;
calculating the difference between the simulated sound pressure value and the actually measured sound pressure value; if the difference value is within the preset range, the determined preset value is considered to be a true value, and if the difference value does not accord with a preset convergence condition, the sound power of the sound equipment to be measured is adjusted;
and giving the obtained true value to the established model to carry out sound field simulation, and calculating a sound field cloud picture.
Further, the sound emitting device to be measured of the converter station includes: one or more of converter transformer, tie transformer, line high reactance, bus high reactance, filter capacitor tower, filter reactor, smoothing reactor, line corona and hardware corona.
Further, the sound source localization extraction method comprises a near-field acoustic holography method or a beam forming method, and specifically comprises the following steps: the method comprises the steps of acquiring noise signals of the sounding equipment to be detected within preset time through a sound source positioning and extracting device, and calculating and acquiring actual measurement sound pressure values of the preset position of the sounding equipment to be detected and a Z weighting frequency spectrum within a preset range.
Further, the actually measured sound pressure value at the preset position is the sound pressure value on any plane within 1 meter of the surface of the sounding device to be detected, and the Z weighting frequency spectrum in the preset range is a noise signal of 100Hz-3150 Hz.
Further, in soundPLAN, one or more of converter transformer, tie transformer, line high reactance, bus high reactance, filter capacitor tower, filter reactor and smoothing reactor are modeled according to industrial construction; modeling the line corona according to a finite length line sound source; the hardware corona is modeled according to a point sound source.
Further, the adjustment of the preset acoustic power is expressed according to the formula: l (L) w ＝L p +10lgS; wherein L is w Is the acoustic power of the device in dB, L p For the measured sound pressure value at the predetermined position, the unit dB, S is the envelope area, and the unit m 2 。
Further, the sounding device to be measured includes: a filter reactor or smoothing reactor; the filter reactor or smoothing reactor is modeled by industrial construction, the bottom surface is set as a suspension surface, and the side and bottom surface acoustic power is independently determined by adopting a sound source positioning extraction method.
Further, the sound field simulation error is within 3 dB.
Further, the preset convergence condition is that the difference is less than or equal to 1dB (A).
A converter station sound field simulation system comprising:
the sound pressure value actual measurement unit is used for collecting noise signals within preset time of the sound production equipment to be tested of the converter station, and calculating and obtaining actual measurement sound pressure values at preset positions of the sound production equipment to be tested according to the noise signals;
the sound pressure value modeling simulation unit is used for modeling the sound equipment to be tested through noise prediction software, presetting the sound power of the sound equipment to be tested according to the obtained model of the sound equipment to be tested, and obtaining the simulation sound pressure value of the preset position of the sound equipment to be tested in the noise prediction software in a simulation mode;
the comparison feedback unit is used for calculating the difference value between the simulation sound pressure value and the actually measured sound pressure value; if the difference value is within the preset range, the determined preset value is considered to be a true value, and if the difference value does not accord with a preset convergence condition, the sound power of the sound equipment to be measured is adjusted; and giving the obtained true value to the established model to carry out sound field simulation and calculating a sound field cloud image.
Compared with the prior art, the invention has the following beneficial effects:
the simulation method is based on a sound source positioning extraction technology, and the problem of inaccurate sound source assignment of the converter station can be solved by calculating the sound power of the equipment through the actually measured sound pressure value; and comparing the simulated sound pressure value with the actually measured sound pressure value, and adjusting the sound field simulation by presetting convergence conditions, so that the accuracy of the sound field simulation can be further improved. The method can be applied to the aspects of noise exceeding responsibility division, noise treatment scheme verification and the like of the extra-high voltage converter station, and has a certain guiding significance on engineering practice.
Furthermore, compared with the traditional single-transducer measurement, the sound pressure value of the sound source surface 1 m is directly measured, and the sound pressure value of the sound sensor far away from the equipment is not measured, so that the simulation calculation is more accurate, and the sound source assignment is more scientific.
Furthermore, at present, there is no unified method in the modeling of the sound field of the extra-high voltage direct current transformer substation, according to the requirement of simulation precision, a converter transformer is generally defined as a point source/a plane source, a filter bank is integrally defined as a point source or a filter capacitor is positioned as a line source, and a filter reactor is integrally positioned as a point source. The modeling methods make rough assumptions on actual conditions, and cannot meet the requirement of high-precision simulation. The invention is based on the positioning extraction result of the sound source, models according to the sounding characteristics of the sounding equipment and the sounding size thereof, can improve the simulation precision, and can more truly reflect the sound field distribution of the extra-high voltage converter station.
Furthermore, the invention builds the model in soundPLAN according to the size of the sounding device, the point sound source, the limited long-line sound source and the industrial building, and has higher modeling precision.
Furthermore, the accuracy of sound field simulation can be adjusted according to the requirement through preset convergence conditions.
Drawings
Fig. 1 is a schematic block flow diagram of a sound field simulation method for a converter station according to an embodiment of the present invention.
Detailed Description
The invention will be described in further detail with reference to the drawings and the specific examples.
Referring to fig. 1, the invention relates to a converter station sound field simulation method, in particular to an extra-high voltage converter station sound field simulation method based on sound source positioning extraction, which mainly comprises noise source positioning extraction, converter station main sounding equipment modeling and equipment sound power back-pushing processes, and specifically comprises the following steps:
step 1: based on the sound source positioning extraction technology, measuring the sound pressure value at the position of 1 meter on the surface of the sound generating device and the Z weighting of the sound pressure value at the position of 100Hz-3150Hz noise spectrum. Considering that the arrangement of the extra-high voltage convertor station equipment is kept at a sufficient distance, and according to the attenuation characteristic of a point/line/surface sound source in the air, other equipment noise is greatly attenuated when being transmitted to a position of 1 meter on the surface of one piece of equipment, the contribution of the other equipment at the position can be ignored, and the sound pressure of the position of 1 meter on the surface of the equipment is considered to be caused by the equipment noise only.
Noise source positioning and extraction rely on a near-field acoustic holographic method or a wave beam forming method, a surface to be measured is set to be 1 meter on the surface of equipment, and the sound pressure value and the frequency spectrum distribution of the surface to be measured are accurately measured through multi-microphone data processing. Specifically, the common noise source positioning and extracting method mainly comprises a near-field acoustic holographic method and a beam forming method. The near-field sound holographic technology measures complex sound pressure or particle vibration velocity on a measuring surface close to the surface of a measured sound source, and then utilizes space sound field transformation to reconstruct a sound pressure field, a vibration velocity field and a sound intensity vector field of a sound source three-dimensional space and can forecast the directivity of a far field. The beam forming method adopts a group of microphones distributed on the space fixed position to measure the space sound field, and outputs of the microphones on the array are subjected to weighting, time delay, summation and other processes, so that useful signals in a specific direction are enhanced, interference signals in other directions are weakened, space directivity is formed, and detailed sound source information can be obtained. The on-site measurement is carried out under the conditions that the sounding of the equipment is stable, the wind speed of the measured on-site is less than 5m/s and no rain or snow exists, a sound source positioning and extracting device is used for aiming at the equipment to be measured, noise signals in a period of time are collected, and the noise signals are reversely pushed to the sound pressure value at the position of 1 meter on the surface of the equipment and the 100Hz-3150HzZ weighting frequency spectrum through multi-microphone signal analysis.
Step 2: respectively establishing models in soundPLAN7.4 according to the size of the sound-producing equipment of the extra-high voltage converter station and point sound sources, limited long-line sound sources and industrial buildings; the industrial building is composed of a plurality of independent limited large-surface sound sources.
Modeling is performed on main sound production equipment of a converter station, converter transformer, interconnection transformer, high line reactance, high bus reactance, a filter capacitor tower, a filter reactor and a smoothing reactor are modeled according to industrial construction, line corona is modeled according to a limited long-line sound source, and fitting corona is modeled according to a point sound source. Specifically, the converter transformer noise mainly includes magnetostriction-induced low-frequency noise and axial flow fan noise. In consideration of the fact that a sound insulation cover is generally installed for a converter transformer in the foundation period of a converter station, after the sound insulation cover is built, only the exhaust side is forced to be exposed to air to radiate noise outwards, so that the sound insulation cover is modeled in an industrial building mode, but only an exposed surface is assigned, and the noise of an axial flow fan can be expressed in a point sound source mode at a corresponding position on the exposed surface. The communication change and high reactance are similar to the communication station condition and are expressed by industrial buildings.
The filter capacitor tower has wide noise frequency band and strong sounding, and is a main noise source of the extra-high voltage converter station. For a single capacitor, the noise level of the bottom surface is higher than that of the side surfaces, and the capacitor tower is generally formed by stacking the single capacitor in a mode that the top surfaces are opposite, and the sounding intensities of different side surfaces have larger difference, so that according to industrial building modeling, the sounding powers of different side surfaces are independently determined by adopting a sound source positioning extraction technology. The filter reactor and the smoothing reactor are generally dry hollow reactors, a plurality of envelopes are arranged in the filter reactor and the smoothing reactor, noise is uniformly distributed along a circle of the cylinder wall, and the noise on the bottom surface is higher than that on the side surface. With industrial building modeling, the bottom surface is set as a suspended surface. The side and bottom acoustic power is determined separately using acoustic source location extraction techniques. The corona discharge points have certain randomness, but the discharge condition in a period of time is counted, and the noise of the corona discharge points presents uniform and limited long-line sound source characteristics for the lead which is comprehensively stunned. In the simulation, parameters such as sound source length, ground height and the like are set according to the actual stunning lead, and the sound power value is obtained by reversely pushing the sound pressure at the position of 1 meter on the surface obtained by the noise positioning and extracting system. The size of the hardware fitting can be processed according to a single point relative to a total station, so that the hardware fitting corona can be processed according to a point sound source, and the sound power is determined by adopting a sound source positioning extraction technology.
Step 3: the acoustic power is preset.
The acoustic power back-thrust can be calculated by adopting a numerical calculation method for the point sound source according to L w ＝L p And +11 calculation, presetting sound power for each surface of the limited long-line sound source and the industrial building, and adjusting the sound power value to enable the sound pressure value at the position of 1 meter on the surface to be the same as the actual measurement value, wherein the sound power value at the moment is considered to be the real sound power of the equipment, so that the purpose of reversely pushing the sound power is achieved. And (2) calculating the sound power and the frequency spectrum of the sound according to the attenuation formula of the sound in the air for the point sound source by using the sound pressure value and the noise frequency spectrum measured in the step (1), and estimating the sound power with the same frequency spectrum component according to the measured 100Hz-3150HzZ weight-calculating noise frequency spectrum for the limited-length line sound source and the industrial building, and carrying out simulation verification by taking the sound power into the modeling type in the step (2).
Specifically, the following relationship exists between the sound pressure level and the sound power level:
L w ＝L p +10lgS
wherein L is w Is the acoustic power of the device in dB, L p For the measured sound pressure value at the predetermined position, unit dB, S represents the area of the envelope sound source, unit m 2 。
The method can be applied to point sound source sound power calculation, and also can be applied to sound power estimation and adjustment of limited long-line sound sources and industrial buildings.
(1) Calculating the sound power of the point sound source; when the sound source is a hardware corona isocenter sound source, the sound source is positioned at high altitude and can be regarded as a free field, namely:
L w ＝L p +20lgr+11
where r is the distance from the sound source to the measuring point, and the unit is m.
Since the sound pressure value is 1 meter of the sound pressure of the sound source surface, the relationship between the sound pressure and the sound power of the sound source can be further simplified as:
L w ＝L p +11；
thus, hardware corona and wire coronaThe acoustic power can be expressed as L w ＝L p +11。
(2) Setting the initial value of the sound power of a limited long-line sound source and an industrial building:
L w ＝L p +10lgS
wherein L is w Is the acoustic power of the device in dB, L p For the measured sound pressure value at the predetermined position, unit dB, S represents the area of the envelope sound source, unit m 2 。
The difference between the sound power and the sound pressure value is not changed along with the frequency, namely, when the sound power value is estimated, the same value is required to be overlapped at different frequency spectrums on the basis of actually measured frequency spectrum components of the sound pressure value so as to ensure the corresponding relation of the noise frequency spectrums.
Step 4: checking the sound power; the sound pressure value and the frequency spectrum of the 1 meter position on the surface of the equipment are controlled to be the same as the actual measurement value by a numerical calculation or iteration method, and accordingly the single equipment sound power of the extra-high voltage converter station is determined; and carrying out simulation calculation on the sound field distribution of the extra-high voltage convertor station by taking the sound power into the model.
And (3) checking whether the sound pressure at the 1 meter position on the surface of the equipment in simulation accords with the sound pressure value at the 1 meter position on the surface of the actually measured equipment, if the convergence condition is not met, continuing to adjust the sound power of the sound source until the sound power is the same as the actually measured value, and then, setting the sound power to be the accurate sound power of the equipment. In step 4, when determining the acoustic power by adopting an iterative calculation method, the following relationship between the acoustic power and the sound pressure value in the air is considered: l (L) w ＝L p + lgS, the difference between the visible sound power and the sound pressure value does not change with frequency, so when the sound power value is adjusted in step 4, the same value should be superimposed on different frequency spectrums on the basis of actually measured frequency spectrum components of the sound pressure value, so as to realize adjustment of the sound power value. Specifically, due to the acoustic exposure surface size and the acoustic pressure L at 1 meter of the surface p It has been determined that there is a unique solution to the acoustic power. The sound power value is increased or decreased by increasing the same value for each frequency spectrum of the sound power, and finally, the predicted value of the sound pressure at the position of 1 meter on the surface is matched with the measured value, and the sound power value of the limited long-line sound source or one side of the industrial building is determined. For each point sound source, limited long line sound source and industrial buildingAnd (3) respectively carrying out simulation verification on one surface, finally obtaining accurate acoustic power values and spectrum distribution of all sound sources, and finally bringing the acoustic power into the simulation calculation of the sound field distribution of the extra-high voltage converter station by the modeling of the step (2).
And 5, referring to the step 3 and the step 4, respectively performing simulation verification on each point sound source, each limited-length line sound source and each face of the industrial building to obtain accurate noise source sound power values and spectrum distribution thereof, and finally performing simulation calculation by using the model.
The invention provides a sound field simulation system of a convertor station, which comprises the following components: the sound pressure value actual measurement unit is used for acquiring an actual measurement sound pressure value at a preset position of the sound production equipment to be measured; the sound pressure value modeling simulation unit is used for modeling the sound production equipment to be tested of the converter station and obtaining the simulation sound pressure value of the preset position in a simulation mode; and the comparison feedback unit is used for comparing and acquiring the actually measured sound pressure value and the simulation sound pressure value and feeding back the difference value of the actually measured sound pressure value and the simulation sound pressure value. The simulation method of the invention can be realized by the simulation system of the invention.
In summary, when the simulation calculation of the sound field of the convertor station is carried out at present, the high-altitude corona noise of the alternating current region cannot be measured, and the accurate corona noise source size cannot be given; the influence of corona noise is not considered in the simulation process; the filter has a plurality of capacitors and reactors in the field, the size and frequency of the sound source are different, and the sound source test can not be carried out on a single device; in the simulation calculation process, a planar sound source is generally given according to the occupied area of the filter, and the modeling precision is not high; at partial areas or partial monitoring points of the factory boundary of the converter station, the deviation between the noise prediction and the actual measurement value can reach 5-10dB, and the error is larger. In the comprehensive view, the noise source of the extra-high voltage converter station cannot be accurately obtained by means of single microphone measurement, sound source parameters are not determined by an effective method in simulation, and simulation scientificity is to be improved. According to the invention, a noise source positioning and extracting technology is applied to the ultra-high voltage converter station sound field simulation, the problem of inaccurate sound source assignment is solved, the simulation precision is improved, and a corresponding modeling method is provided according to the main equipment type of the ultra-high voltage converter station, so that a brand new technical means is provided for the ultra-high voltage converter sound field simulation. The method solves the problem that simulation parameters of the extra-high voltage converter station are difficult to determine, can control the simulation error of the sound field within 3dB, improves the simulation accuracy and scientificity of the sound field, can be applied to the aspects of noise exceeding responsibility division, noise treatment scheme verification and the like of the extra-high voltage converter station, and has a certain guiding significance on engineering practice.
Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.
It will be appreciated by those skilled in the art that 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 the like) 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 flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations 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.
The above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, one skilled in the art may make modifications and equivalents to the specific embodiments of the present invention, and any modifications and equivalents not departing from the spirit and scope of the present invention are within the scope of the claims of the present invention.
Claims (8)
1. The sound field simulation method for the converter station is characterized by comprising the following steps of:
collecting noise signals of the to-be-tested sound production equipment of the converter station within a preset time, and calculating and obtaining an actual measurement sound pressure value at a preset position of the to-be-tested sound production equipment according to the noise signals;
modeling the sounding equipment to be tested through noise prediction software; presetting the sound power of the sound equipment to be tested according to the obtained model of the sound equipment to be tested; simulation sound pressure values of the preset positions of the sounding equipment to be detected are obtained in a simulation mode in noise prediction software;
calculating the difference between the simulated sound pressure value and the actually measured sound pressure value; if the difference value is within the preset range, the determined preset value is considered to be a true value, and if the difference value does not accord with a preset convergence condition, the sound power of the sound equipment to be measured is adjusted;
giving the obtained true value to an established model to carry out sound field simulation, and calculating a sound field cloud picture;
the step of acquiring a noise signal of the sound production equipment to be tested of the converter station within a preset time and calculating and acquiring an actual measurement sound pressure value of the preset position of the sound production equipment to be tested according to the noise signal specifically comprises the following steps:
the sound source localization extraction method comprises a near-field acoustic holography method or a beam forming method, and specifically comprises the following steps: acquiring noise signals of the sounding equipment to be detected within preset time through a sound source positioning and extracting device, and calculating and acquiring an actual measurement sound pressure value at a preset position of the sounding equipment to be detected and a Z weighting frequency spectrum within a preset range;
the measured sound pressure value at the preset position is the sound pressure value on any plane within 1 meter of the surface of the sounding device to be measured, and the Z weighting frequency spectrum in the preset range is a noise signal of 100Hz-3150 Hz.
2. A converter station sound field simulation method according to claim 1, characterized in that the sound generating device to be tested in the converter station comprises at least one of the following: converter transformer, tie transformer, line high reactance, bus high reactance, filter capacitor tower, filter reactor, smoothing reactor, line corona and hardware corona.
3. The sound field simulation method of a converter station according to claim 2, wherein in soundPLAN, one or more of converter transformer, tie transformer, line high reactance, bus high reactance, filter capacitor tower, filter reactor and smoothing reactor are modeled according to industrial construction; modeling the line corona according to a finite length line sound source; the hardware corona is modeled according to a point sound source.
4. The sound field simulation method of a converter station according to claim 1, wherein the adjustment of the preset sound power is expressed according to the formula: l (L) w ＝L p +10lgS; wherein L is w Is the acoustic power of the device in dB, L p For the measured sound pressure value at the predetermined position, the unit dB, S is the envelope area, and the unit m 2 。
5. A converter station sound field simulation method according to claim 1, characterized in that the sound generating device to be measured comprises: a filter reactor or smoothing reactor; the filter reactor or smoothing reactor is modeled by industrial construction, the bottom surface is set as a suspension surface, and the side and bottom surface acoustic power is independently determined by adopting a sound source positioning extraction method.
6. A converter station sound field simulation method according to claim 1, characterized in that the sound field simulation error is within 3 dB.
7. A sound field simulation method for a converter station according to any one of claims 1 to 6, characterized in that the preset convergence condition is that the difference is 1dB (a) or less.
8. A sound field simulation system for a converter station, comprising:
the sound pressure value actual measurement unit is used for collecting noise signals within preset time of the sound production equipment to be tested of the converter station, and calculating and obtaining actual measurement sound pressure values at preset positions of the sound production equipment to be tested according to the noise signals;
the sound pressure value modeling simulation unit is used for modeling the sound equipment to be tested through noise prediction software, presetting the sound power of the sound equipment to be tested according to the obtained model of the sound equipment to be tested, and obtaining the simulation sound pressure value of the preset position of the sound equipment to be tested in the noise prediction software in a simulation mode;
the comparison feedback unit is used for calculating the difference value between the simulation sound pressure value and the actually measured sound pressure value; if the difference value is within the preset range, the determined preset value is considered to be a true value, and if the difference value does not accord with a preset convergence condition, the sound power of the sound equipment to be measured is adjusted; giving the obtained true value to an established model to carry out sound field simulation and calculating a sound field cloud image;
the step of acquiring a noise signal of the sound production equipment to be tested of the converter station within a preset time and calculating and acquiring an actual measurement sound pressure value of the preset position of the sound production equipment to be tested according to the noise signal specifically comprises the following steps: the sound source localization extraction method comprises a near-field acoustic holography method or a beam forming method, and specifically comprises the following steps: acquiring noise signals of the sounding equipment to be detected within preset time through a sound source positioning and extracting device, and calculating and acquiring an actual measurement sound pressure value at a preset position of the sounding equipment to be detected and a Z weighting frequency spectrum within a preset range; the measured sound pressure value at the preset position is the sound pressure value on any plane within 1 meter of the surface of the sounding device to be measured, and the Z weighting frequency spectrum in the preset range is a noise signal of 100Hz-3150 Hz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811603366.2A CN109670257B (en) | 2018-12-26 | 2018-12-26 | Sound field simulation method and system for converter station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811603366.2A CN109670257B (en) | 2018-12-26 | 2018-12-26 | Sound field simulation method and system for converter station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109670257A CN109670257A (en) | 2019-04-23 |
| CN109670257B true CN109670257B (en) | 2023-05-05 |
Family
ID=66147273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811603366.2A Active CN109670257B (en) | 2018-12-26 | 2018-12-26 | Sound field simulation method and system for converter station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109670257B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110600044B (en) * | 2019-06-24 | 2022-10-04 | 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 |
| CN110567576B (en) * | 2019-09-11 | 2022-10-28 | 中国电力科学研究院有限公司 | Method and device for determining reason for standard exceeding of factory boundary noise of transformer substation |
| 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 |
| CN111985113B (en) * | 2020-08-28 | 2024-04-16 | 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 |
| CN112466627B (en) * | 2020-11-11 | 2021-12-24 | 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 |
| CN113340614A (en) * | 2021-06-10 | 2021-09-03 | 中国第一汽车股份有限公司 | Wind noise index determination platform, wind noise simulation target determination method and device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101140760A (en) * | 2006-09-08 | 2008-03-12 | 联想移动通信科技有限公司 | Sound signal collecting and processing system and method thereof |
| WO2015051631A1 (en) * | 2013-10-12 | 2015-04-16 | 华为技术有限公司 | Sound signal outputting method and device, and terminal |
| CN105467241A (en) * | 2015-12-08 | 2016-04-06 | 国家电网公司 | A distributed converter transformer direct current bias detection system and a detection method thereof |
| CN107609278A (en) * | 2017-09-18 | 2018-01-19 | 安徽理工大学 | A kind of method for improving steam power plant's noise prediction model precision |
| CN107609332A (en) * | 2017-09-18 | 2018-01-19 | 安徽理工大学 | A kind of method of converter power transformer far-field noise prediction |
| CN108021750A (en) * | 2017-12-04 | 2018-05-11 | 北京理工大学 | A kind of internal combustion engine radiated noise method of tire for considering human hearing characteristic |
-
2018
- 2018-12-26 CN CN201811603366.2A patent/CN109670257B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101140760A (en) * | 2006-09-08 | 2008-03-12 | 联想移动通信科技有限公司 | Sound signal collecting and processing system and method thereof |
| WO2015051631A1 (en) * | 2013-10-12 | 2015-04-16 | 华为技术有限公司 | Sound signal outputting method and device, and terminal |
| CN105467241A (en) * | 2015-12-08 | 2016-04-06 | 国家电网公司 | A distributed converter transformer direct current bias detection system and a detection method thereof |
| CN107609278A (en) * | 2017-09-18 | 2018-01-19 | 安徽理工大学 | A kind of method for improving steam power plant's noise prediction model precision |
| CN107609332A (en) * | 2017-09-18 | 2018-01-19 | 安徽理工大学 | A kind of method of converter power transformer far-field noise prediction |
| CN108021750A (en) * | 2017-12-04 | 2018-05-11 | 北京理工大学 | A kind of internal combustion engine radiated noise method of tire for considering human hearing characteristic |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109670257A (en) | 2019-04-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109670257B (en) | Sound field simulation method and system for converter station | |
| WO2022237708A1 (en) | Sound wave interference correction method and system for audible noise prediction of transformer substation | |
| CN107609332B (en) | Method for predicting far-field noise of converter transformer | |
| CN107609278B (en) | Method for improving accuracy of thermal power plant noise prediction model | |
| CN111261188B (en) | Method and device for determining noise frequency spectrum of high-voltage transformer | |
| CN107885934A (en) | Elastic construction acoustic radiation forecasting procedure under ocean channel based on coupling FEM PE | |
| CN106679797B (en) | Method and device for testing sound insulation quantity of sound insulation cover of shunt reactor | |
| CN111063528B (en) | Active noise reduction equipment of transformer and transformer noise on-line monitoring system | |
| CN109782206A (en) | A kind of compensation for calibrating errors method for wideband transient voltage measuring device | |
| CN107271868A (en) | A kind of shelf depreciation time-delay calculation error compensating method based on multiple neural network | |
| CN113008361A (en) | Substation boundary noise anti-environmental interference detection method and device | |
| CN108242962A (en) | A kind of indoor signal propagation loss computational methods and device based on measurement report | |
| CN111753405A (en) | Transformer substation sound source equipment source intensity solving method and system | |
| CN110098610B (en) | Real-time identification method and system for oscillation leading mode of power system under fault disturbance | |
| CN108593093B (en) | Ultra-high voltage transformer acoustic power field measurement method | |
| CN114152824B (en) | Real-time monitoring and optimizing control method for environmental noise of transformer substation | |
| CN114091533A (en) | Transformer noise identification and reverse reduction method and medium based on laser vibration measurement | |
| CN109708746A (en) | A kind of distributed vibration signal processing accelerated method based on ARM and FPGA | |
| Gauvreau et al. | Uncertainties in numerical predictions and experimental characterization of wind farm noise | |
| CN114136434B (en) | Anti-interference estimation method and system for noise of substation boundary of transformer substation | |
| RU2672529C1 (en) | Method for forming spectra of random vibration | |
| CN111983398A (en) | Power transformer partial discharge TDOA (time difference of arrival) positioning method and system under condition of considering NLOS (non line of sight) | |
| Kozupa et al. | The dependence of transformer sound power measurement accuracy on microphone configurations in the anechoic chamber. | |
| CN118310627B (en) | Urban transformer substation noise systematic control method | |
| CN117072424B (en) | Debugging method and system for reducing working noise of air compressor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |