A kind of transformer station noise-reduction method
The present invention relates to a kind of noise control technique, specific design one transformer station noise-reduction method.
The noise source of transformer station includes the sound source devices such as main transformer, grounding transformer, capacitor, bus, cable brake, breaker.
Wherein, main transformer is the topmost noise source of transformer station, and its noise level becomes positive correlation to associate with power load.In daily fortune
Under row operating mode, the near field noise level of main transformer is up to 65～more than 67dB (A), through calculating, at peak of power consumption operating condition
Under, it is contemplated that near field instantaneous noise level is up to 69～72dB (A).Further, the core vibration of main transformer also can cause main transformer pressure
The part floor resonance that device is indoor, and produce low frequency secondary structure noise.Main transformer noise of equipment is common with secondary structure noise
Surrounding enviroment are created the biggest impact by effect.
In transformer station's actual motion, capacitor also produces certain noise when working with bus, and its near field noise level typically exists
Change between 50～56dB (A).
Judging after transformer station carries out actual test analysis, the global noise characteristic of transformer station produces with the sensing of converting equipment iron core
Electromagnetic vibration noise is main, and there is certain secondary structure noise.Noise spectrum feature is based on low-frequency noise, and with one
Determine the higher hamonic wave noise of composition.
It is residential block and office, the concentrated area of public institution at transformer station's periphery, noise emission limit value is required higher, now
If only considering the design of transformer station's electricity function index, then it is proved to be difficult to control at normal level by station circle noise sound level,
Therefore must carry out noise reduction engineering, take the Measures on Noise Control being correlated with.
Conventional rock wool sound-absorbing material only has an obvious acoustically effective to high-frequency noise, and loses efficacy rapidly after making moist, it is impossible to meets and becomes
The noise reduction demand in power station and service demand.Although and the material such as foamed aluminium, spray fiber can administer low-frequency noise, but cost is too
Height, sound absorption ridge curves also fails to cover the frequency of higher hamonic wave noise, and comprehensive Noise Reduction effect is the most inconspicuous.To this end, at noise reduction
Needing to combine main sound source feature during design, emphasis considers the related measure of Curve guide impeller.
Summary of the invention
For solving above-mentioned deficiency of the prior art, it is an object of the invention to provide a kind of transformer station noise-reduction method, the method is acted on
Environmental protection theory, uses new material, new technique, new technology that newly-built transformer station is carried out noise-reducing design, is effectively controlled station
Boundary's noise emission.
It is an object of the invention to use following technical proposals to realize:
The present invention provides a kind of transformer station noise-reduction method, is a kind of noise-reduction method using the plan of newly-built transformer station, and its feature exists
In, described method comprises the steps:
(1) reference station is selected, it was predicted that the noise spectrum feature of described transformer station and propagation effect rule；
(2) noise reduction sound-absorbing material (frequency range 20～200Hz) and the type selecting of device and Application Design；
(3) comprehensive Noise Reduction scheme based on finite element analysis is determined.
Further, in described step (1), investigate topology layout and the electric pressure of sound source device, the brand of described transformer station
Model and manufacturer's information, reselection and the reference station of described substation structure layout same approach, use sound meter to measure and divide
Analyse sound source device near field in this reference station, far-field noise and the station circle noise at reference station, and the Noise map drawing reference station (makes
The noise ground at reference station is drawn with noise prediction assessment software Sound-plan, environment noise simulation softward Cadna-A or Lima
Figure), as spectral characteristics of noise and the analysis foundation of propagation effect rule of described transformer station；
The spectrogram of in using sound meter measurement to obtain reference station and station circle noise, determines the distribution frequency range of sound energy.3, as
Noise-reduction method described in claim 2, it is characterised in that according to the Noise map at reference station, analysis can effectively carry out noise
The key node controlled, including noise source, noise transmission approach and sensitive point for noise, observation main transformer and cooling system thereof
Far and near field noise sound level, the door and window of transformer chamber, enters at air exhaust passage mouth and the noise sound level in the range of the circle periphery 50m of station and biography
Broadcast decay characteristics.
Further, in described step (2), the choosing of noise reduction sound-absorbing material, construction and device is carried out according to transformer station's noise behavior
Type and Application Design；The sound absorption ridge curves of described noise reduction sound-absorbing material covers the distribution frequency range of sound energy, its structure and dress
Put meet do not affect station in electrical equipment properly functioning on the premise of, be arranged on the requirement at key node.
Further, described noise reduction sound-absorbing material uses framework sound absorption wall form, and microperforated panel and aluminum fiberboard are formed is double
Resonance low frequency composite sound-absorbing material, is laid in wall position, transformer station indoor, and described noise reduction sound-absorbing material is for the low frequency of 100Hz
During sound absorption, described noise reduction sound-absorbing material has the acoustic absorptivity of more than 0.3；Described noise reduction sound-absorbing material is for 100～1600Hz
During high frequency sound absorption, it is not less than the sound-absorbing material of 0.6 for having acoustic absorptivity.
Further, described noise reduction sound-absorbing material is micropore-fiber composite sound-absorbing material, and is processed into sound absorption wall, sound absorption
Door and muffler.
Further, in described step (3), in conjunction with Finite Element Simulation Analysis, take into account sound field, flow field and heat effect multi-scenarios method,
Meet noise reduction, heat radiation and wind path optimizing factors and carry out scheme simulation optimization design, make the noise control of sound absorption-sound insulation-noise elimination
Comprehensive Design scheme.
Further, the noise control comprehensive Design scheme of described sound absorption-sound insulation-noise elimination includes: described transformer station inner cable interlayer
Enter the installation of air exhausting soundproofing system；The installation of main transformer room top air exhausting soundproofing system；Main transformer indoor sound absorption wall and disappearing
The installation of sound system and the installation of main transformer room soundproof door.
Further, described transformer station inner cable interlayer enters the installation of air exhausting soundproofing system and includes: enter row at substation cable interlayer
Wind passage installs Soundproofing static pressure box, bend muffler and 1～6 silent ventilator, and fan noise is less than 60dB；
The installation of described main transformer room top air exhausting soundproofing system includes: each main transformer room lateral wall wall cloth puts 3～6
Vent, each main transformer room roof all has the vent of 1～3 diameter 0.5m；And Soundproofing static pressure box, noise elimination are installed
Device and 1～6 silent ventilator, fan noise is less than 60dB；
The installation of described main transformer indoor sound absorption wall and sound-attenuating system includes: noise reduction sound-absorbing material is with the shape of framework sound absorption wall
Formula is laid in main transformer room internal face position；Main transformer room enter in air exhaust passage install Soundproofing static pressure box, acoustic filter,
Bend muffler and 2～6 silent ventilators, fan noise is less than 60dB；
The installation of described transformer room soundproof door includes: install opposite opened soundproof door, every main transformer room at original big outer side of door
Design soundproof door 1～3；Soundproof door door body is combined with noise reduction sound-absorbing material, inserts noise reduction sound-absorbing material inside soundproof door,
To ensure sound insulation and the low frequency absorption dual function of soundproof door door body；Light sound-proof wall, side in body of wall is designed above soundproof door
Enter noise reduction sound-absorbing material；Set acoustically effective and carrying support situation design margin, so that body of wall has sound insulation and low frequency absorption is imitated
Really；Soundproof door uses pre-buried structure mode to fix；Dispose into support steel beam at sound insulation doorframe, jointly support top with pre-buried structure
Light sound-proof wall, it is ensured that integrally-built safe and reliable use.
Compared with immediate prior art, the excellent effect that the technical scheme that the present invention provides has is:
1. the present invention is by investigating reference station, it was predicted that the influence of noise situation of newly-built station, thus with regard to energy before transformer substation construction
Propose Measures on Noise Control targetedly, consider anti-acoustic capability, Economic Evaluation and the impact on substation operation, formulate
Reasonable execution scheme.
2. new material is environmental friendliness shaped material, compared with the noise reduction sound-absorbing materials such as now widely used rock wool, glass cotton, no
Can produce inorganic dust and pollute environment, having can the environmental protection characteristic of repeatedly recycling；New material is metallic fiber material, with
Traditional inorganic noise reduction sound-absorbing material is compared, and has unrivaled advantage in mechanical strength and ageing-resistant aspect.Meanwhile, at tide
Under the conditions of wet, dry, high temperature, severe cold, sand and dust, high ultraviolet, acid and alkali corrosion etc., serviceability will not be affected,
There is excellent dependability.
3. based on simulation noise-reducing design and structure design: combine advanced foreign technology method, consider sound field, flow field be correlated with
The impact of characteristic, it is achieved analogue technique based on transformer station's characteristic, is applied in transformer station's noise-reducing design, really realizes fall
Make an uproar design accurately mate target；Arrange and simulation of acoustic field result according to substation equipment, do not affecting substation operation function
Design the version of noise-reducing device under premise and laying mode is installed.
4. security protection feature: safe operation and the requirement of emergency, this noise-reducing design are analyzed master in view of transformer station
The safe case of emergency of transformer room, relevant design take into account that oil tank of transformer oil extraction, transformer temperature be too high, transformer station is sent out
Light a fire the emergencies such as calamity.
5. the present invention acts on eco-friendly idea of development, in line with the objective to whole society's popularization green ecological environmental protection concept, represents
The science of the low-carbon environment-friendly technology such as the new material of energy-conserving and environment-protective, new technique, new technology and recycled water, solar energy, wind energy, rationally
Utilize, environmentally friendly low noise transformer station, project of transmitting and converting electricity environmental protection Demonstration Construction is played leading action.
Accompanying drawing explanation
Fig. 1 is the main transformer point position figure that the present invention provides；Wherein: (a) is 2# main transformer point position figure；(b)
For 3# main transformer point position figure；
Fig. 2 is main transformer each measuring point spectrogram that the present invention provides；Wherein: (a) is the frequency spectrum of 2# main transformer measuring point 1 and 2
Figure；B () is the spectrogram of 2# main transformer measuring point 3 and 4；C () is 3# main transformer measuring point 5 and 6 spectrogram；(d)
For 3# main transformer measuring point 7 and 8 spectrogram；
Fig. 3 is micropore composite sound-absorbing material/structure absorption coefficient curve figure that the present invention provides；
Fig. 4 is that the location drawing is measured on the station circle that the present invention provides；
Fig. 5 is the station circle measuring point spectrogram that the present invention provides；
Fig. 6 is the environmental background noise spectrogram that the present invention provides.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described in further detail.
The following description and drawings illustrate specific embodiments of the present invention fully, to enable those skilled in the art to put into practice it
?.Other embodiments can include structure, logic, electric, process and other change.Embodiment only generation
The change that table is possible.Unless explicitly requested, otherwise individually assembly and function are optional, and the order operated can change.
The part of some embodiments and feature can be included in or replace part and the feature of other embodiments.The enforcement of the present invention
The scope of scheme includes the gamut of claims, and all obtainable equivalent of claims.In this article,
These embodiments of the present invention can be represented by " inventing " individually or generally with term, and this is only used to conveniently, and
And if in fact disclose the invention more than, be not meant to automatically to limit this application and in the range of any single invention or send out
The present invention provides a kind of transformer station noise-reduction method, and described method is adopted firstly the need of the buider's work drawing according to construction of transformer substation and plan
The equipment list purchased, grasps transformer station's main sound source equipment and topology layout, and selects a reference station, by field survey and
Noise map technology, it was predicted that the noise spectrum feature of newly-built transformer station and propagation effect rule, thus carries out low frequency noise reduction sound absorption material
Material, the type selecting of construction and device and Application Design, in conjunction with Finite Element Simulation Analysis, take into account sound field, flow field, heat effect many
Coupling, meets noise reduction, heat radiation, wind path optimize and multifactor carry out scheme simulation optimization design.After having constructed, record station circle
Noise is that (dB (A) represents acoustic power level to 43.61dB (A)；), meet the standard of I class acoustic environment functional areas.Described method
Act on environmental protection theory, use new material, new technique, new technology that newly-built transformer station is carried out noise-reducing design, effectively control
Liao Zhan circle noise emission, has the biggest application potential under the situation of environmental requirement increasingly stringent, can be as same type transformer station
The reference of noise-reducing design.
The present invention provides a kind of Noise Control Design method of newly-built transformer station, described method based on universal design, reference with
The B station of A station same approach, by the investigation standing B, the noise emission situation of Pre-Evaluation A, to grasp A station sound source frequency
Spectrum and intensity；Control target for noise expection, use the novel sound-absorbing material of specific frequency spectrum and advanced analogue technique, will be new
Type sound-absorbing material combines with other auxiliary noise reduction measure, carries out the control of transformer station's noise.Concrete protocol step is:
(1) investigation of transformer station's noise and assessment:
Use sound meter to measure analysis B station owner and want the near field noise of sound source device and the station circle noise of transformer station, in conjunction with pertinent literature
Source investigation analyzes noise spectrum feature；According to data measured, use advanced Noise map analytical technology, draw noise ground in station
Figure, noise transmission affecting laws in analysis station.
(2) novel low-frequency noise reduction sound-absorbing material and the type selecting of device and Application Design:
The noise pattern recorded by sound meter, finds that the noise at this station is mainly low-frequency noise, acoustic energy is mainly distributed on 50,
100,200, at 300Hz, along with the increase acoustic energy of frequency is gradually lowered, but obvious in the appearance one of about 1300Hz
For noise frequency rate and wide band feature in station, the sound-absorbing material of selection should have good low frequency absorption performance and relatively
Wide sound sucting band, and meet service condition (preferable durability and fire line) in station.Determine to use framework sound absorption wall
Form, by the double resonance novel low-frequency composite sound-absorbing material/structure of microperforated panel with aluminum fiberboard composition, is laid in indoor wall position
Put, to improve the effect of low-frequency sound absorption of transformer station to greatest extent, reduce transformer chamber's sound field energy.This material/structure biases toward low
Frequency sound absorption, i.e. has the acoustic absorptivity of more than 0.3, additionally, be respectively provided with higher acoustic absorptivity 100～1600Hz at 100Hz
(being not less than 0.6), and acoustic board is all-aluminium construction, does not fires, the most mould, be stale-proof, light weight, attractive in appearance.By changing fibre board
Fibre diameter, porosity and thickness of slab, just can change its acoustic resistance characteristic；By regulation microwell plate and the spacing of fibre board, regulation
The back of the body chamber thickness of sound-absorbing composite board, just can change its acoustic reactance characteristic.Therefore, theoretical in conjunction with acoustic impedance match, by controlling micropore
The technological parameter of fiber composite acoustic board, just can be adjusted flexibly the crest coverage of its absorption coefficient curve.This time major control
Noise frequency be 50,100,200 and 300Hz, the sound-absorbing composite board therefore selected sound absorbing capabilities in this frequency range is excellent.
According to Noise map analysis in station, the air exhaust passage that enters of transformer chamber and cable interlayer is that main transformer indoor noise is outwards propagated
Main path, indoor converting equipment need to be blocked by soundproof door and acoustic filter and exchange with outdoor acoustic energy, and be dropped by vibration isolator
The construct noise that low fan vibration produces.
(3) comprehensive Noise Reduction scheme based on finite element analysis:
According to each side actual states such as transformer station's civil engineering structure, device distribution, environmental demands, utilize the analogue technique of system,
Sound field in transformer station, flow field, thermal field are resolved accurately, in conjunction with theoretical and practical experience, makes sound absorption-sound insulation
The noise control comprehensive Design scheme of-noise elimination.Specifically include that cable interlayer enters the installation of air exhausting soundproofing system；Transformer chamber roof row
The installation of emaciation due to emotional upset sound system；Absorb sound in transformer chamber wall and the installation of sound-attenuating system；The installation of transformer chamber's soundproof door.
In addition to meeting transformer station's noise reduction demand, described noise-reducing design also analyzes the safe case of emergency of main transformer room: described in set
Meter does not interferes with store oil and the oil extraction function (not changing original design structure) in store oil hole, and the aeration radiation system of transformator is the fullest
Foot transformator heat radiation needs, and noise-reducing design material therefor is all not to be fired or fire proofing, can when tackling the emergencies such as fire
Effectively guarantee safety problem.
1, transformer station's noise measurement is analyzed:
This project, with B station as objects for analogy, carries out noise emission prediction, thus grasps A station Source Spectrum and intensity A station.
Main transformer point position (1#, 4# are without main transformer) as shown in Figure 1.During measurement, measuring point distance ground level 1.5 meters, distance main transformer
Fuel tank shell 1.5 meters.Fig. 2 is main transformer each measuring point spectrogram that the present invention provides；Wherein: (a) is 2# main transformer measuring point 1
With 2 spectrogram；B () is the spectrogram of 2# main transformer measuring point 3 and 4；C () is 3# main transformer measuring point 5 and 6 frequency
Spectrogram；D () is 3# main transformer measuring point 7 and 8 spectrogram.
From noise spectrum, this station main noise concentrates on below 1000Hz low-frequency noise, wherein 100Hz, 200Hz, 315Hz,
630Hz all has more substantially crest.Visible resonant frequency is concentrated mainly on power frequency and high subresonance harmonics.
2, environmental effect status analysis:
According to factory's circle environmental noise data at B station, the environmental effect situation at analogy A station.Be can be seen that by Noise map, 2# master
The near field noise sound level becoming room and 3# transformer chamber is up to 64dB, along with the increase of propagation distance, noise sound slightly under
Fall, but station circle sound level is 52～54dB, still beyond the emission limit of I class acoustic environment functional areas.After cooling blower is opened, stand
Interior acoustic environment will deteriorate further, 64dB effect of noise expanded range, transformer chamber's near field noise and Substation Station circle noise sound level
Both increase about 2dB.Noise is mainly outwards propagated by transformer chamber gate and exhaust outlet, and the installation noise reduction of being required for property sets
According to " GB3096-2008 standard for acoustic environmental quality ", " GB12348-2008 Industrial Enterprise Factory Boundary environment noise discharge mark
Accurate " and " GB/T 15190 city regional environment noise is suitable for Division technical specification ", factory of analogy transformer station should design out-of-bounds side
For I class acoustic environment functional areas, according to the I class acoustic environment functional areas requirement of national regulation, under day-to-day operation operating mode, the ring at A station
Border sound prediction exceedes country's noise criteria limit value 8～9dB (A)；The level of exceeding standard in the peak of power consumption period will be likely to be breached 12dB
(A) or higher, thus there is the necessity of noise abatement.
3, novel low-frequency composite sound-absorbing material/structure application:
The novel low-frequency composite sound-absorbing material of the present invention/structure uses micropunch resonance sound-absorbing structure and aluminum fiber resonance sound-absorbing structure
The dual resonance structure of composition, to improve the low frequency absorption coefficient of sound-absorbing material to greatest extent, expands absorption band.This kind of material/
The absorption coefficient curve of structure as shown in Figure 4, it can be seen that this kind of material biases toward low frequency absorption, i.e. has at 100Hz
The acoustic absorptivity of more than 0.3, additionally, be respectively provided with higher acoustic absorptivity (being not less than 0.6) 100～1600Hz.The suitableeest
Administer for power industry field low-frequency noises such as transformer stations.And this kind of material is all-aluminium construction, good weatherability, excellent heat radiation performance,
It is easy to recycle.
4, transformer station's noise control engineering:
In view of noise characteristic, environmental effect situation and the site space environmental quality of transformer station, this time transformer station is noise control will
Electromagnetic vibration noise and the secondary structure noise of vibrational excitation generation that emphasis produces for main transformer core excitation launch, and
By perfect sound field, flow field and heat effect matched design, it is achieved social environment benefit of transformer station agrees with the perfection of economic benefit,
Ensure the living environment that nearby residents is good.
According to each side actual states such as substation equipment distribution, building structure, environmental demands, following design content proposed:
(1) the room sound field optimization of main transformer room and noise reduction:
It is the noise control important step of transformer station that main transformer room carries out sound field optimization design.The purpose that room sound field optimizes exists
In: on the one hand, effectively eliminate " standing wave " and " reverberation " effect that main transformer is indoor, reduce the noise level of indoor sound source；
On the other hand, effectively absorb the low-frequency noise that common noise reduction means is difficult to eliminate, to stop low-frequency noise to outdoor propagation, reach
Good noise control effect.
At present, the inside dimension of main transformer of transformer substation room is 7.8m × 9m × 9.5m, rectangular configuration.Former according to room acoustics
Reason, this architectural feature can cause indoor significantly " standing wave " and " reverberation " effect, and amplify the noise level of sound source device.
In order to effectively absorb low-frequency noise and reduce indoor noise level, it is desirable to have carry out the optimization design of room sound field pointedly,
Key position lays the sound-absorbing material with relatively low-and high-frequency acoustically effective, and this makes the installation position of sound field become the pass of noise-reducing design
To this end, the design first sound source characteristics and sound-filed simulation situation to main transformer room is calculated, pass through room acoustics
Simulation computational analysis and practical experience analysis, resolved room sound field mode harmony buckling law and reconstructed, and determined
Affect main orientation and the parameter of sound field change.
Binding isotherm and practical experience, the position affecting main transformer indoor noise most critical at present is positioned at main transformer equipment periphery
Wall at.Adjusting through theoretical and empirical equation, it relates to wall surface area (separate room) lower limit and is about 129.36m2, altitude range
It is about 3.86m (portion, due to safe distance reason, highly makes the appropriate adjustments).Implement in engineering, owing to Party A is external
Sight has coherence request, therefore improves sound absorption wall to 5.5 meters.
In view of this, according to sound absorption feature and the actual requirement of engineering (design of transformer chamber of novel low-frequency composite sound-absorbing material/structure
Surplus and Party A's appearance requirement), separate room novel sound-absorbing material/structural area 185m of main transformer room wall design arrangement2, sound absorption
Material/structure, by the form with framework sound absorption wall, is laid in indoor wall position, and sound-absorbing material/structure height 5.5m, along main
Becoming room wall to arrange, the sound absorption wall control gross thickness of the parts compositions such as framework, gusset and sound-absorbing material is less than 0.16m.Warp
Design accounting, the novel sound-absorbing material/structural wall of laying can effectively absorb the low-frequency noise that main transformer sends, sound wave in control room
Reflection, scattering and reflected effect, reach the design object of indoor sqouynd absorption lowering noise.
(2) sound insulation and noise reducing of main transformer room:
The sound insulation and noise reducing design of main transformer room, is primarily directed to the maintenance door of side, transformer chamber north and south, and this maintenance door is sound insulation
Weak link.Owing to main transformer room can be propagated by this weak link, so that carry out at sound insulation with the exchange of extraneous acoustic energy
Reason.The maintenance door of main transformer room is changed to high-efficiency sound insulating door by this project, to prevent noise from passing through door body transmission to outdoor propagation.
Concretely comprise the following steps: at original big outer side of door, opposite opened soundproof door, every main transformer room design soundproof door 1～3 are installed.Door body
It is combined with novel sound-absorbing material, inside soundproof door, inserts novel sound-absorbing material, it is ensured that the sound insulation of door body is double with low frequency absorption
Recast is used；Above soundproof door, design light sound-proof wall, inside body of wall, insert novel sound-absorbing material.Consider acoustically effective and
Carrying support situation, design margin be enough to make body of wall have sound insulation and effect of low-frequency sound absorption；Soundproof door uses pre-buried structure mode solid
Fixed；Dispose into 1 support steel beam high for 2.0m at sound insulation doorframe, jointly support the light sound-proof wall of top with pre-buried structure, protect
Demonstrate,prove integrally-built safe and reliable use.
(3) ventilation and heat of main transformer room and noise reduction:
Main transformer room is carried out flow field, heat effect and noise control comprehensive Design, be to ensure that converting equipment safe and stable,
The important prerequisite that low noise runs.In the case of and apparatus of load higher at ambient temperature and humidity is relatively big, main transformer would generally produce
Bigger heat, it is contemplated that the fin of main transformer is arranged in outdoor, only partial heat is emitted on indoor, therefore can carry out
Corresponding ventilation and heat design.For this reason, it may be necessary to consider ventilation and heat and noise control demand, on the one hand to main transformer
The air flow field of room carries out appropriate design, it is ensured that converting equipment can safe operation under limiting condition and environmental condition；Another
Aspect, carries out Noise Control Design to main transformer room ventilation and heat link, it is ensured that this link is accurately mated with other links,
Ensure the overall noise reduction of transformer station.
At present, the aeration structure of main transformer room is mainly: the vent 4 of 1.5m × 0.9m put by every room lateral wall wall cloth,
The vent 1 of diameter 0.5m is all had above transformer chamber southern side.
Related data according to analogy B station and A station owner transformer room internal-external temperature difference situation, transformer performance, indoor design knot
The parameters such as structure, are first calculated room air flow field condition, stream field distribution, circulation path, the flow direction, flow velocity, gas
The multiple parameters such as rotation distribution are analyzed, the Flow Field Distribution in transformer chamber's ventilation window cross section, with exhaust outlet not on same cross section,
Have been carried out transformer chamber during simulation calculation and enter comprehensive analysis of air draft.
Through design demonstration, room air flow field can by main transformer be provided above blower fan and air exhausting soundproofing system and under
Side arranges the distribution characteristics that ventilating noise-elimination system reaches relatively reasonable, it is possible to realize the target that converting equipment effectively dispels the heat.Meanwhile,
Position laying to cooling fan compares analysis, it is contemplated that the hot-fluid directivity of room air, chooses and ventilates above indoor
Mouth is as the optimal installation position of cooling fan.Fan delivery and total pressure parameter, join according to temperature rise, environment and indoor and outdoor structure
Amount calculates, and 1 typhoon amount is 6000m3/ h, the axial flow blower of total pressure 100Pa, the ventilation in transformer chamber can be met completely and dissipate
On the premise of ensureing ventilation and heat, it is specifically designed for indoor ventilating radiating feature and devises the Measures on Noise Control into exhaust outlet,
It is mainly used in blocking indoor converting equipment and the exchange of outdoor acoustic energy.Wherein, the top air intake/outtake system of transformer chamber uses low noise
Blower fan 4, cable interlayer air intake/outtake system uses blower fan 5, and switch gear room's air intake/outtake system uses silent ventilator 4.This
Outward, noise control in order to ensure exhaust system, each air intake/outtake system is used Soundproofing static pressure box, acoustic filter, noise elimination the most in a large number
The equipment such as elbow.
(4) make an inspection tour for main transformer room, overhaul and relevant design during overhaul:
This noise-reducing design has taken into full account main transformer tour, maintenance and the correlation circumstance of overhauling reform, has reserved corresponding sky
For the daily tour of main transformer room, this design remains original personnel's Vomitory, the acoustic wall of indoor wall
Thickness is less than 0.16m, does not take the work space of tour personnel, does not interferes with and make an inspection tour work normally.
For the maintenance repair of main transformer room, according to the relevant negotiation to client, the parts of maintenance can pass through soundproof door
Turnover；If desired, absorb sound wall quick release, and whole designs all can meet maintenance needs.
For the overhauling reform of main transformer room, the acoustic filter on relevant body of wall is design for disassembly with sound absorption wall, with convenient
Dismounting during overhauling reform and installation, it is ensured that being smoothed out of normal work.
5, noise reduction engineering implementation result:
The actual test result of noise reduction measure after putting into operation according to transformer station, can obtain noise reduction such as table 1 institute of each noise reduction measure
The actual measurement noise reduction guide look of table 1 transformer station noise reduction measure
|Noise reduction measure title
|The noise reduction of onsite application
|Roof air-discharge silencer
|Roof silent ventilator
|Exhaust outlet noise 57.9dB (A)
|Transformer chamber's sound absorption wall
|8.1dB (low frequency 10.8dB)
|Transformer chamber's soundproof door
|Transformer chamber's ventilating noise-elimination plenum chamber
|Switch gear room's fans silencer
|B1 pipeline silencer
During measuring station circle noise, owing to operating mode and condition limit, mainly it is provided with measuring point on station circle, transformer station southern side, sees Fig. 4 institute
Show.Fig. 5 is station circle each measuring point spectrum signature.
From station circle frequency spectrum, at boundary of standing, displacement noise sound level is about 43.61dB (A), fully meets GB12348I class acoustic environment
The requirement of functional areas emission limit.
Fig. 6 is environmental background noise spectrum signature, can calculate from figure, and the environmental background noise of transformer station is about
43.37dB (A), less with station circle displacement noise difference, when illustrating to measure, external interference is less, and measurement data is effective.
After application technical scheme has been constructed, recording station circle noise is 43.61dB (A), meets I class acoustic environment function
The standard in district.Described method acts on environmental protection theory, uses new material, new technique, new technology to drop newly-built transformer station
Make an uproar design, be effectively controlled station circle's noise emission, be the design of same type transformer station under the situation of environmental requirement increasingly stringent
The particular order of the step during disclosed in should be understood that or level are the examples of illustrative methods.Based on design preference,
The particular order of the step during it should be understood that or level can obtain weight in the case of without departing from the protection domain of the disclosure
New arrangement.Appended claim to a method gives the key element of various step with exemplary order, and is not limited to described
Particular order or level.
In above-mentioned detailed description, various features combine together in single embodiment, to simplify the disclosure.Should not
It is construed to reflect such intention by this open method, i.e. the embodiment of theme required for protection is it will be clear that ground exists
The more feature of feature stated in each claim.On the contrary, as the following claims reflect, this
Daylight is in the state fewer than whole features of disclosed single embodiment.Therefore, appending claims is the most clearly
Being merged in detailed description, wherein each claim is alone as the single preferred embodiment of the present invention.
Described above includes the citing of one or more embodiment.Certainly, in order to describe above-described embodiment, parts or side are described
The all possible combination of method is impossible, but it will be appreciated by one of ordinary skill in the art that each embodiment can be done
Further combinations and permutations.Therefore, embodiment described herein is intended to fall into the protection domain of appended claims
Interior all such changes, modifications and variations.Additionally, the term with regard to using in description or claims " comprises ",
The mode that contains of this word is similar to term and " includes ", is used as what link word was explained in the claims just as " including, "
Above example is only in order to illustrate that technical scheme is not intended to limit, although with reference to above-described embodiment to the present invention
Be described in detail, those of ordinary skill in the field still the detailed description of the invention of the present invention can be modified or
Person's equivalent, these are without departing from any amendment of spirit and scope of the invention or equivalent, all await the reply in application this
Within bright claims.