CN109138591A - A kind of transformer noise reduction barrier noise at the boundary processing system - Google Patents
A kind of transformer noise reduction barrier noise at the boundary processing system Download PDFInfo
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- CN109138591A CN109138591A CN201810795922.4A CN201810795922A CN109138591A CN 109138591 A CN109138591 A CN 109138591A CN 201810795922 A CN201810795922 A CN 201810795922A CN 109138591 A CN109138591 A CN 109138591A
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- 230000004888 barrier function Effects 0.000 title claims abstract description 61
- 239000000463 material Substances 0.000 claims description 7
- 239000013078 crystal Substances 0.000 claims description 5
- 230000009466 transformation Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 5
- 238000009413 insulation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H17/00—Fencing, e.g. fences, enclosures, corrals
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B1/84—Sound-absorbing elements
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- Acoustics & Sound (AREA)
- Civil Engineering (AREA)
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- Electromagnetism (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
A kind of transformer noise reduction barrier noise at the boundary processing system, including secondary sound source (1), reference sensor (2), error pick-up (3), controller (4) and noise reduction barrier (5).Reference sensor (2) and error pick-up (3) are connected with controller (4) respectively, and controller (4) is connected with secondary sound source (1).Sound barrier (5) is arranged in around transformer, and secondary sound source (1) is fixed on the top of sound barrier (5).Sound barrier (5) hinders the straightline propagation of transformer noise, and reference sensor (2) acquires diffraction noise, and error pick-up (3) acquisition noise eliminates the noise signal in region.Controller (4) receives reference sensor (2) and the data of error pick-up (3) are handled, the de-noising signal obtained after processing is sent to secondary sound source (1), secondary sound source (1) plays noise reduction sound and is overlapped mutually with diffraction noise, realizes active noise reduction.
Description
Technical field
The present invention relates to a kind of transformer noise processing systems more particularly to a kind of active noise reduction and material noise reduction to combine
Noise reduction system.
Background technique
Substation plays an important role in power transmission conversion process.With the continuous expansion of power grid scale, one
The installation site of power transformer is divided to be increasingly closer near house and public place.To guarantee that substation's surrounding resident is not become
The influence of depressor running noises needs reasonably to control transformer noise.Transformer noise mainly includes this bulk noise
And fan noise.Fan noise is generally broadband noise, this bulk noise is mainly caused by silicon steel sheet magnetostriction, with low-frequency noise
Based on.Therefore become one of the vital task of transformer noise reduction for the control of fan for cooling transformer and this bulk noise.
The method of transformer external noise reduction mainly has active noise reduction and two kinds of material noise reduction at present.Based on active noise reduction is also referred to as
Dynamic formula noise reduction, as Chinese patent CN201520244534 can be offseted based on the relevant principle of sound wave by generating with transformer noise
The secondary sound wave to disappear realizes noise reduction.But when sound source area is larger, in order to reach noise reduction effect, secondary sound source array is huge
Greatly, very high to the requirement of controller.And influence of the placement of secondary sound source and error pick-up to noise reduction effect is very big,
So active noise reduction not yet large-scale application.Material barrier is common noise-reduction method, such as Chinese patent CN201610457231,
Multiple sound barrier presets are set between main transformer and enclosure wall, sound barrier noise reduction is installed.But sound barrier is not to sound source
All closings, cause sound insulation effect undesirable in the boundary of sound barrier since there are diffractions for sound wave.
For transformer noise reduction, it is feasible method that sound barrier noise reduction, which is arranged, near transformer.Transformer is located at
The interior survey of sound barrier, it is contemplated that actual field application and economy problems, the limited height of sound barrier, it is existing that there are the diffractions of noise
As causing the noise reduction effect of sound barrier lateral area bad.The diffraction of especially low-frequency noise is more obvious, substantially reduces
The noise reduction effect in noise reduction region near on the outside of sound barrier.
Summary of the invention
In order to overcome the above-mentioned deficiency of the prior art, the present invention proposes a kind of transformer noise reduction barrier noise at the boundary processing
System.Sound barrier and active noise reduction are combined and carry out transformer noise reduction by the present invention, can overcome sound barrier noise reduction because of low frequency
The secondary sound source placement of the bad problem of noise reduction effect caused by noise diffraction and active noise reduction influences noise reduction effect
Larger problem, obtains the stabilization noise reduction effect of large area, while can reduce the height of sound barrier, saves noise reduction cost.
To achieve the goals above, the present invention adopts the following technical scheme:
The transformer noise reduction barrier noise at the boundary processing system, including secondary sound source, reference sensor, error pass
Sensor, controller and sound barrier.Reference sensor and error pick-up are connected with controller respectively；Controller and secondary sound source phase
Even.Sound barrier is arranged in around transformer, plays the role of sound insulation.Secondary sound source is laid above sound barrier.Reference sensor is adopted
Collect diffraction noise, error pick-up acquisition noise eliminates the noise signal in region, and controller receives reference sensor and error passes
The data of sensor carry out adaptive-filtering processing, and the de-noising signal obtained after processing is sent to secondary sound source, and secondary sound source plays drop
Noise sound is overlapped mutually with diffraction noise, realizes active noise reduction.
In the transformer noise reduction barrier noise at the boundary processing system, transformer is located at the inside of sound barrier.Secondary sound
Source is located at the top on the outside of sound barrier.Noise eliminates the top that area is located at sound barrier outer side subsidiary sound source.
The sound barrier is made of the phonon crystal material with sound insulation effect.
The secondary sound source is to be made of loudspeaker array.Loudspeaker placement angle is upward perpendicular to the ground.
The secondary sound source interval is equal, and the spacing distance of neighboring secondary sound source is less than the 1/6 of noise wavelength.
The reference sensor is made of one or more condenser type MIC sensors, is placed in sound barrier and is surveyed top, adopts
Collect noise signal, input controller.
The error pick-up is made of one or more condenser type MIC sensors, is placed in noise and is eliminated area, acquisition is made an uproar
Sound eliminates the signal in region, input controller.
The controller core chip centroid is FPGA, passes through the place to reference sensor and error pick-up input signal
Reason, control secondary sound source export noise reduction sound, achieve the purpose that noise abatement region noise reduction.
Detailed description of the invention
The side view that Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the main view of structural schematic diagram of the invention；
Fig. 3 a sound barrier front view；
Fig. 3 b sound barrier side view.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and detailed description.
The transformer noise reduction barrier noise at the boundary processing system includes secondary sound source 1, reference sensor 2, error biography
Sensor 3, controller 4 and sound barrier 5, side view is as shown in Figure 1, main view is as shown in Figure 2.Reference sensor 2, error sensing
Device 3 and secondary sound source 1 are connected with controller respectively, and sound barrier 5 is arranged in around transformer, and secondary sound source 1 is fixed on sound-screen
The top in 5 outside of barrier.Sound barrier can hinder the straightline propagation of transformer noise, realize passive noise control.Reference sensor acquisition
The diffraction noise that transformer non-rectilinear is propagated, error pick-up acquisition noise eliminate the noise signal in region, and controller receives ginseng
The data for examining sensor and error pick-up carry out adaptive-filtering processing, and the de-noising signal obtained after processing is sent to secondary sound
Source, secondary sound source play noise reduction sound and are overlapped mutually with diffraction noise, realize active noise reduction.
In the transformer noise reduction barrier noise at the boundary processing system, transformer is located at the inside of sound barrier.Secondary sound
Source is located at the top on the outside of sound barrier.Noise eliminates the top that area is located at the outer side subsidiary sound source of sound barrier.
The sound barrier 5 is the structure of phonon crystal material made of the phonon crystal material with sound insulation effect
As shown in Figure 3a and Figure 3b shows, phonon crystal presss from both sides one layer of hoistway acoustical cotton as substrate using two layers of baffle blanket, and wherein uniformly
Insertion copper rod.
The secondary sound source 1 is to be made of loudspeaker array.Loudspeaker placement angle is upward perpendicular to the ground.
The secondary sound source interval is equal, and the spacing distance of neighboring secondary sound source is less than the 1/6 of noise wavelength.
The reference sensor 2 is made of one or more condenser type MIC sensors, is placed in sound barrier and is surveyed top,
Acquisition noise signal, input controller.
The error pick-up 3 is made of one or more condenser type MIC sensors, is placed in noise and is eliminated area, acquisition
The signal of noise abatement region, input controller.
The controller core chip centroid is FPGA, passes through the place to reference sensor and error pick-up input signal
Reason, control secondary sound source export noise reduction sound, achieve the purpose that noise abatement region noise reduction.
Claims (7)
1. a kind of transformer noise reduction barrier noise at the boundary processing system, it is characterised in that: the transformer noise reduction barrier
Noise at the boundary processing system includes secondary sound source (1), reference sensor (2), error pick-up (3), controller (4) and noise reducing
Barrier (5)；Reference sensor (2) and error pick-up (3) are connected with controller (4) respectively；Controller (4) and secondary sound source
(1) it is connected；Sound barrier (5) is arranged in around transformer, and secondary sound source (1) is fixed on the top of sound barrier (5)；Sound barrier
(5) straightline propagation of transformer noise is hindered, reference sensor (2) acquires diffraction noise, and error pick-up (3) acquisition noise disappears
Except the noise signal in region, controller (4) receives reference sensor (2) and the data of error pick-up (3) are handled, and handles
The de-noising signal obtained afterwards is sent to secondary sound source (1), and secondary sound source (1) plays noise reduction sound and is overlapped mutually with diffraction noise, real
Existing active noise reduction.
2. transformer noise reduction barrier noise at the boundary processing system as described in claim 1, it is characterised in that: the transformation
Device is located at the inside of sound barrier (5), and secondary sound source (1) is located at the top on the outside of sound barrier (5), and noise eliminates area and is located at sound barrier
(5) top of outer side subsidiary sound source (1).
3. transformer noise reduction barrier noise at the boundary processing system as described in claim 1, it is characterised in that: the sound-screen
Barrier (5) is made of phonon crystal material.
4. transformer noise reduction barrier noise at the boundary processing system as described in claim 1, it is characterised in that: the secondary
Sound source (1) is made of loudspeaker array；The placement angle of loudspeaker is upward perpendicular to the ground；The arrangement interval of secondary sound source (1)
Equal, the spacing distance of neighboring secondary sound source (1) is less than the 1/6 of noise wavelength.
5. transformer noise reduction barrier noise at the boundary processing system as described in claim 1, it is characterised in that: the reference
Sensor (2) is made of condenser type MIC sensor, is placed in sound barrier (5) inside top；Reference sensor (2) acquisition noise letter
Number, input controller (4).
6. the noise reduction barrier noise at the boundary processing system of transformer as described in claim 1, which is characterized in that the mistake
Gap sensor (3) is made of condenser type MIC sensor, is placed in noise and is eliminated area, acquisition noise eliminates the signal in region, input control
Device (4) processed.
7. transformer noise reduction barrier noise at the boundary processing system as described in claim 1, it is characterised in that: the control
The core chips of device (4) is FPGA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810795922.4A CN109138591A (en) | 2018-07-19 | 2018-07-19 | A kind of transformer noise reduction barrier noise at the boundary processing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810795922.4A CN109138591A (en) | 2018-07-19 | 2018-07-19 | A kind of transformer noise reduction barrier noise at the boundary processing system |
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| Publication Number | Publication Date |
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| CN109138591A true CN109138591A (en) | 2019-01-04 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1851804A (en) * | 2006-05-22 | 2006-10-25 | 南京大学 | Active soft boundary acoustic shielding |
| CN102184730A (en) * | 2011-02-17 | 2011-09-14 | 南京大学 | Feed-forward active noise barrier |
| CN106094654A (en) * | 2016-08-16 | 2016-11-09 | 武汉大学 | A kind of power transformer active noise control system based on disturbance observation method |
| CN106169293A (en) * | 2016-07-08 | 2016-11-30 | 南京大学 | Frame type virtual sound screen |
| CN106203386A (en) * | 2016-07-21 | 2016-12-07 | 武汉大学 | The anti-interference adaptive algorithm of power transformer Active noise control using based on compress speech μ rule function |
| CN206157597U (en) * | 2016-08-30 | 2017-05-10 | 国家电网公司 | A noise protective screen and shield assembly fall in full frequency channel for transformer substation |
| CN107767855A (en) * | 2017-09-15 | 2018-03-06 | 南京大学 | A kind of active broadband sound arrester for wall ventilation |
-
2018
- 2018-07-19 CN CN201810795922.4A patent/CN109138591A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1851804A (en) * | 2006-05-22 | 2006-10-25 | 南京大学 | Active soft boundary acoustic shielding |
| CN102184730A (en) * | 2011-02-17 | 2011-09-14 | 南京大学 | Feed-forward active noise barrier |
| CN106169293A (en) * | 2016-07-08 | 2016-11-30 | 南京大学 | Frame type virtual sound screen |
| CN106203386A (en) * | 2016-07-21 | 2016-12-07 | 武汉大学 | The anti-interference adaptive algorithm of power transformer Active noise control using based on compress speech μ rule function |
| CN106094654A (en) * | 2016-08-16 | 2016-11-09 | 武汉大学 | A kind of power transformer active noise control system based on disturbance observation method |
| CN206157597U (en) * | 2016-08-30 | 2017-05-10 | 国家电网公司 | A noise protective screen and shield assembly fall in full frequency channel for transformer substation |
| CN107767855A (en) * | 2017-09-15 | 2018-03-06 | 南京大学 | A kind of active broadband sound arrester for wall ventilation |
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Application publication date: 20190104 |
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