CN106285083B - A kind of substation's noise-reduction method - Google Patents
A kind of substation's noise-reduction method Download PDFInfo
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- CN106285083B CN106285083B CN201510239508.1A CN201510239508A CN106285083B CN 106285083 B CN106285083 B CN 106285083B CN 201510239508 A CN201510239508 A CN 201510239508A CN 106285083 B CN106285083 B CN 106285083B
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Abstract
The present invention relates to a kind of substation's noise-reduction methods, this method is according to the buider's work drawing and equipment list of construction of transformer substation, grasp substation's main sound source equipment and topology layout, and select reference station, pass through field survey and Noise map technology, predict the noise spectrum feature and propagation effect rule of newly-built substation, carry out low frequency noise reduction sound-absorbing material, the type selecting and application design of construction and device, in conjunction with Finite Element Simulation Analysis, take into account sound field, flow field and fuel factor multi- scenarios method, meet noise reduction, heat dissipation, wind path optimizing factors carry out the design of scheme simulation optimization, from sound absorption, sound insulation and aspect of eliminating the noise reduce station circle's noise emission.After the completion of construction, measuring station circle's noise is 43.61dB, meets the standard of I class acoustic environment functional areas.The effective control station circle noise emission of method provided by the invention, provides reference under the increasingly strict situation of environmental requirement for the design of same type substation.
Description
Technical field
The present invention relates to a kind of noise control techniques, specifically design a kind of substation's noise-reduction method.
Background technique
The noise source of substation includes that the sound sources such as main transformer, grounding transformer, capacitor, bus, cable brake, breaker are set
It is standby.Wherein, main transformer is the most important noise source of substation, and noise level is positively correlated with power load and is associated with.In day
Under normal operating condition, the near field noise grade of main transformer up to 65~67dB (A) more than, through calculating, run work in peak of power consumption
Under condition, it is contemplated that near field instantaneous noise grade is up to 69~72dB (A).Also, the core vibration of main transformer can also cause main transformer pressure
The indoor part floor resonance of device, and generate low frequency secondary structure noise.Main transformer noise of equipment and secondary structure noise are total
Same-action produces very big influence to surrounding enviroment.
In substation's actual motion, capacitor and bus also generate certain noise, near field noise grade one when working
As change between 50~56dB (A).
Judge after carrying out actual test analysis to substation, the global noise characteristic of substation is with the induction of transformer equipment iron core
Based on the electromagnetic vibration noise of generation, and there are certain secondary structure noises.Noise spectrum feature based on low-frequency noise, and
With the higher hamonic wave noise of certain ingredients.
It is the concentrated area of residential block and organ, public institution on substation periphery, it is more demanding to noise emission limit value,
At this time if only considering the design scheme of substation's electricity function index, boundary's noise sound level control that is proved to be difficult to stand is just
Ordinary water is flat, it is therefore necessary to carry out noise reduction engineering, take relevant Measures on Noise Control.
Common rock wool sound-absorbing material only has apparent sound absorption effect to high-frequency noise, and fails rapidly after making moist, cannot
Meet the noise reduction demand and service demand of substation.And although the materials such as foamed aluminium, spray fiber can administer low-frequency noise,
Cost is too high, and sound absorption ridge curves also fail to the frequency of covering higher hamonic wave noise, and comprehensive Noise Reduction effect is not obvious.For this purpose,
It needs to combine main sound source feature in noise-reducing design, emphasis considers the related measure of Curve guide impeller.
Summary of the invention
To solve above-mentioned deficiency of the prior art, the object of the present invention is to provide a kind of substation's noise-reduction method, the party
Method adheres to environmentally protective theory, carries out noise-reducing design to newly-built substation using new material, new technology, new process, effective to control
Zhi Liaozhan circle noise emission.
The purpose of the present invention is adopt the following technical solutions realization:
The present invention provides a kind of substation's noise-reduction method, is a kind of noise-reduction method used to the plan of newly-built substation,
It is characterized in that, the method includes the following steps:
(1) reference station is selected, predicts the noise spectrum feature and propagation effect rule of the substation；
(2) type selecting and application design of noise reduction sound-absorbing material (20~200Hz of frequency range) and device；
(3) the comprehensive Noise Reduction scheme based on finite element analysis is determined.
Further, in the step (1), investigate the topology layout of the substation and the voltage class of sound source device,
Brand and model and manufacturer's information, the reference station of reselection and substation structure layout same approach, use sound level meter
The station circle noise in sound source device near field, far-field noise and reference station in the reference station is analyzed in measurement, and draws the noise at reference station
Map (draws reference station using noise prediction assessment software Sound-plan, ambient noise simulation softward Cadna-A or Lima
Noise map), the analysis foundation of noise spectrum characteristics and the propagation effect rule as the substation；
The spectrogram of in reference station and station circle's noise is obtained using sound level meter measurement, determines the distribution frequency of noise acoustic energy
Section.3, noise-reduction method as claimed in claim 2, which is characterized in that according to the Noise map at reference station, analysis can effectively into
The key node of row noise control, including noise source, noise transmission approach and sensitive point for noise observe main transformer and its cooling
The far and near field noise sound level of system, the door and window of transformer chamber, into the sound within the scope of the circle periphery 50m of at air exhaust passage mouth and station
Grade and propagation attenuation feature.
Further, in the step (2), noise reduction sound-absorbing material, construction and device are carried out according to substation's noise behavior
Type selecting and application design；The distribution frequency range of the sound absorption ridge curves covering noise acoustic energy of the noise reduction sound-absorbing material, knot
Structure and device meet the requirement being mounted at key node under the premise of not influencing to stand interior electrical equipment normal operation.
Further, the noise reduction sound-absorbing material is using framework sound absorption wall surface form, by microperforated panel and aluminum fiber board group
At double resonance low frequency composite sound-absorbing material, be laid in wall surface position in substation room, the noise reduction sound-absorbing material is used for 100Hz
Low frequency absorption when, the noise reduction sound-absorbing material have 0.3 or more acoustic absorptivity；The noise reduction sound-absorbing material for 100~
When the high frequency sound absorption of 1600Hz, to possess the sound-absorbing material that acoustic absorptivity is not less than 0.6.
Further, the noise reduction sound-absorbing material be micropore-fiber composite sound-absorbing material, and be processed into sound absorption wall surface,
Sound absorption door and muffler.
Further, in the step (3), in conjunction with Finite Element Simulation Analysis, more sound field, flow field and fuel factor couplings are taken into account
It closes, meets noise reduction, heat dissipation and wind path optimizing factors and carry out the design of scheme simulation optimization, make sound absorption-sound insulation-noise elimination noise
Control comprehensive design scheme.
Further, the sound absorption-sound insulation-noise elimination noise control comprehensive design scheme includes: electric in the substation
Installation of the cable clip layer into air exhausting soundproofing system；The installation of air exhausting soundproofing system at the top of main transformer room；Sound absorption in main transformer room
The installation of wall surface and sound-attenuating system and the installation of main transformer room soundproof door.
Further, the installation of power transformation station cable interlayer into the air exhausting soundproofing system includes: to press from both sides in substation cable
Layer is lower than 60dB into air exhaust passage installation Soundproofing static pressure box, bend muffler and 1~6 silent ventilator, fan noise；
The installation of air exhausting soundproofing system includes: each main transformer room unilateral side wall arrangement 3 at the top of the main transformer room
~6 ventilation openings are provided with the ventilation opening of 1~3 diameter 0.5m on each main transformer room roof；And noise elimination static pressure is installed
Case, silencer and 1~6 silent ventilator, fan noise are lower than 60dB；
The installation of sound absorption wall surface and sound-attenuating system includes: noise reduction sound-absorbing material with framework sound absorption wall in the main transformer room
The form in face is laid in main transformer room inner wall position；Main transformer room into install in air exhaust passage Soundproofing static pressure box,
Silencer, bend muffler and 2~6 silent ventilators, fan noise are lower than 60dB；
The installation of transformer room's soundproof door includes: in original big outer side of door installation opposite opened soundproof door, every main transformer
Design soundproof door 1~3 in depressor room；Soundproof door door body and the progress of noise reduction sound-absorbing material are compound, and noise reduction is placed on the inside of soundproof door
Sound-absorbing material, to guarantee the sound insulation and low frequency absorption double action of soundproof door door body；Light sound-proof wall is designed above soundproof door,
Noise reduction sound-absorbing material is placed on the inside of wall；Gather sound absorption effect and carrying support situation design margin, so that wall has sound insulation
And effect of low-frequency sound absorption；Soundproof door is fixed using pre-buried structure mode；It disposes in sound insulation doorframe into support steel beam, with pre-buried structure
The light sound-proof wall of common support top, guarantees integrally-built safe and reliable use.
Compared with the immediate prior art, the excellent effect that technical solution provided by the invention has is:
1. the present invention predicts the influence of noise situation of newly-built station, to build in substation by investigating to reference station
It is preceding targetedly to propose Measures on Noise Control, comprehensively consider anti-acoustic capability, Economic Evaluation and the shadow to substation operation
It rings, formulates reasonable execution scheme.
2. new material is environmentally friendly material, with the noise reductions sound-absorbing material phase such as now widely used rock wool, mineral wool
Than, will not generate inorganic dust pollution environment, have can repeatedly recycling and reusing environmental protection characteristic；New material is metallic fiber material
Material has unrivaled advantage in mechanical strength and ageing-resistant aspect compared with traditional inorganic noise reduction sound-absorbing material.Together
When, service performance not will receive any shadow under the conditions ofs humidity, drying, high temperature, severe cold, sand and dust, high ultraviolet light, acid and alkali corrosion etc.
It rings, there is excellent use reliability.
3. noise-reducing design based on simulation and structure design: in conjunction with advanced foreign technology method, comprehensively considering sound field, flow field
The influence of correlation properties is realized the analogue technique based on substation's characteristic, is applied in substation's noise-reducing design, really real
The accurate matching target of existing noise-reducing design；According to substation equipment arrangement and sound field analog result, substation operation is not being influenced
The structure type and installation laying mode of noise-reducing device are designed under the premise of function.
4. security protection feature: the requirement in view of substation to safe operation and emergency, this noise-reducing design point
The safe case of emergency of main transformer room is analysed, relevant design considers that oil tank of transformer oil extraction, transformer temperature is excessively high, becomes
The emergencies such as fire occur for power station.
5. the present invention adheres to environmental-friendly idea of development, in line with the ancestor for promoting green ecological environmental protection concept to the whole society
Purport shows the section of the low-carbon environment-friendlies technology such as energy-saving and environment-friendly new material, new technology, new process and recycled water, solar energy, wind energy
It learns, rationally utilize, leading action plays to project of transmitting and converting electricity environmental protection Demonstration Construction in environmentally friendly low noise substation.
Detailed description of the invention
Fig. 1 is main transformer point position figure provided by the invention；Wherein: (a) being 2# main transformer point position figure；
It (b) is 3# main transformer point position figure；
Fig. 2 is each measuring point spectrogram of main transformer provided by the invention；Wherein: being (a) frequency spectrum of 2# main transformer measuring point 1 and 2
Figure；It (b) is the spectrogram of 2# main transformer measuring point 3 and 4；It (c) is 3# main transformer measuring point 5 and 6 spectrograms；It (d) is 3# main transformer
The spectrogram of depressor measuring point 7 and 8；
Fig. 3 is micropore composite sound-absorbing material provided by the invention/structure absorption coefficient curve figure；
Fig. 4 is station circle provided by the invention measurement position figure；
Fig. 5 is station circle provided by the invention measuring point spectrogram；
Fig. 6 is environmental background noise spectrogram provided by the invention.
Specific embodiment
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing.
The following description and drawings fully show specific embodiments of the present invention, to enable those skilled in the art to
Practice them.Other embodiments may include structure, logic, it is electrical, process and other change.Embodiment
Only represent possible variation.Unless explicitly requested, otherwise individual component and function are optional, and the sequence operated can be with
Variation.The part of some embodiments and feature can be included in or replace part and the feature of other embodiments.This hair
The range of bright embodiment includes equivalent obtained by the entire scope of claims and all of claims
Object.Herein, these embodiments of the invention can individually or generally be indicated that this is only with term " invention "
For convenience, and if in fact disclosing the invention more than one, the range for being not meant to automatically limit the application is to appoint
What single invention or inventive concept.
The present invention provides a kind of substation's noise-reduction method, and the method is firstly the need of the buider's work drawing according to construction of transformer substation
With the equipment list of quasi- buying, substation's main sound source equipment and topology layout are grasped, and selects a reference station, by the spot
Measurement and Noise map technology predict the noise spectrum feature and propagation effect rule of newly-built substation, thus carry out low frequency drop
Make an uproar sound-absorbing material, construction and device type selecting and application design, in conjunction with Finite Element Simulation Analysis, take into account sound field, flow field, thermal effect
Multi- scenarios method is answered, noise reduction, heat dissipation, the multifactor carry out scheme simulation optimization design of wind path optimization are met.After the completion of construction, station is measured
Boundary's noise is that 43.61dB (A) (dB (A) indicates acoustic power level；), meet the standard of I class acoustic environment functional areas.The method adheres to
Environmentally protective theory carries out noise-reducing design to newly-built substation using new material, new technology, new process, is effectively controlled station
Boundary's noise emission has very big application potential under the increasingly strict situation of environmental requirement, can be used as same type substation drop
The reference for design of making an uproar.
Embodiment one
The present invention provides a kind of Noise Control Design method of newly-built substation, the method based on universal design,
Reference and the B of the station A same approach stand, and pass through the investigation stood to B, the noise emission situation of Pre-Evaluation A, to grasp the station A sound source frequency
Spectrum and intensity；For the expected control target of noise, novel sound-absorbing material and advanced analogue technique using specific frequency spectrum will be new
Type sound-absorbing material is combined with other auxiliary noise reduction measures, carries out the control of substation's noise.Specific protocol step are as follows:
(1) investigation of substation's noise and assessment:
Analysis B station owner is measured using sound level meter and wants the near field noise of sound source device and the station circle noise of substation, in conjunction with phase
It closes documents and materials and researchs and analyses noise spectrum feature；It is drawn in station according to data measured using advanced Noise map analytical technology
Noise map, noise transmission affecting laws in analysis station.
(2) type selecting and application design of novel low-frequency noise reduction sound-absorbing material and device:
The noise pattern measured by sound level meter finds that the noise at the station is mainly low-frequency noise, and acoustic energy mainly divides
Cloth is at 50,100,200,300Hz, as the increase acoustic energy of frequency gradually decreases, but at the appearance of 1300Hz or so one
It is apparent to rise.
There should be good low frequency absorption for noise frequency rate in standing and wide band feature, the sound-absorbing material of selection
Energy and wider sound sucting band, and meet service condition (preferable durability and fire line) in station.It determines to absorb sound using framework
Double resonance novel low-frequency composite sound-absorbing material/structure of microperforated panel and aluminum fiberboard composition is laid in room by the form of wall surface
Inner wall position reduces transformer chamber's sound field energy to improve the effect of low-frequency sound absorption of substation to greatest extent.Material/the knot
Structure biases toward low frequency absorption, is the acoustic absorptivity for possessing 0.3 or more in 100Hz, in addition, all having in 100~1600Hz higher
Acoustic absorptivity (be not less than 0.6), and acoustic board is all-aluminium construction, non-ignitable, not mould, be stale-proof, be light, is beautiful.Pass through change
Fibre diameter, porosity and the plate thickness of fiberboard can change its acoustic resistance characteristic；By adjusting between microwell plate and fiberboard
Away from, adjust sound-absorbing composite board back chamber thickness, its acoustic reactance characteristic can be changed.Therefore, in conjunction with acoustic impedance match theory, pass through control
The wave crest coverage area of its absorption coefficient curve can be adjusted flexibly in the technological parameter of microporous fiber composite acoustic board processed.This time
The noise frequency mainly controlled be 50,100,200 and 300Hz, therefore select sound-absorbing composite board in the frequency range sound absorbing performance
It is excellent.
According to Noise map analysis in standing it is found that transformer chamber and cable interlayer into air exhaust passage be main transformer room noise to
The main path of outer propagation need to block indoor transformer equipment that can exchange with outdoor sound, and pass through by soundproof door and silencer
Vibration isolator reduces the structural noise that fan vibration generates.
(3) the comprehensive Noise Reduction scheme based on finite element analysis:
According to the various aspects actual state such as substation's civil engineering structure, device distribution, environmental demand, the simulation skill of system is utilized
Art accurately parses the sound field in substation, flow field, thermal field, in conjunction with theoretical and practical experience, makes sound absorption-
Sound insulation-noise elimination noise control comprehensive design scheme.Specifically include that the installation of cable interlayer into air exhausting soundproofing system；Transformer chamber
The installation of roof air exhausting soundproofing system；The installation of sound absorption wall surface and sound-attenuating system in transformer chamber；The installation of transformer chamber's soundproof door.
In addition to meeting substation's noise reduction demand, the noise-reducing design also analyzes the safe case of emergency of main transformer room:
The design will not influence the store oil and oil extraction function (having not been changed former design structure) in store oil hole, the aeration radiation system of transformer
Fully meet transformer heat dissipation needs, noise-reducing design material therefor is all non-ignitable or fire proofing, reply fire etc. promptly
It can effectively ensure safety problem when situation.
Embodiment two
1, substation's noise testing is analyzed:
This project stands to A and carries out noise emission prediction using the station B as objects for analogy, to grasp A station Source Spectrum and strong
Degree.Main transformer point position is as shown in Figure 1 (1#, 4# are without main transformer).When measurement, measuring point is apart from 1.5 meters of ground level, apart from main transformer oil
1.5 meters of tank shell.Fig. 2 is each measuring point spectrogram of main transformer provided by the invention；Wherein: being (a) 2# main transformer measuring point 1 and 2
Spectrogram；It (b) is the spectrogram of 2# main transformer measuring point 3 and 4；It (c) is 3# main transformer measuring point 5 and 6 spectrograms；It (d) is 3#
The spectrogram of main transformer measuring point 7 and 8.
By noise spectrum it is found that the station main noise concentrates on 1000Hz or less low-frequency noise, wherein 100Hz, 200Hz,
315Hz, 630Hz have more obvious wave crest.It can be seen that resonant frequency is concentrated mainly on power frequency and high subresonance harmonics.
2, environment influences status analysis:
According to factory's circle environmental noise data that B stands, the environment at the station analogy A influences situation.It can be seen that by Noise map, 2#
The near field noise sound level of transformer chamber and 3# transformer chamber is up to 64dB, and with the increase of propagation distance, noise sound slightly has
Decline, but boundary's sound level of standing is 52~54dB, still exceeds the emission limit of I class acoustic environment functional areas.After cooling blower is opened, stand
Interior acoustic environment will further deteriorate, and the coverage of 64dB noise expands, transformer chamber's near field noise and substation's station circle's sound
Grade both increases 2dB or so.Noise mainly passes through transformer chamber gate and exhaust outlet is propagated outward, needs targetedly to install noise reduction
Facility.
According to " GB3096-2008 standard for acoustic environmental quality ", " GB12348-2008 Industrial Enterprise Factory Boundary ambient noise discharge
Standard " and " 15190 city regional environment noise of GB/T is applicable in Division technical specification ", out-of-bounds side should be set factory of analogy substation
I class acoustic environment functional areas are calculated as, are required according to the class acoustic environment functional areas I of national regulation, under day-to-day operation operating condition, the station A
It is more than country 8~9dB of noise criteria limit value (A) that ambient noise is estimated；It will likely reach in the exceeded level of peak of power consumption period
12dB (A) or higher, thus there are the necessity of noise abatement.
3, novel low-frequency composite sound-absorbing material/structure application:
Novel low-frequency composite sound-absorbing material/structure of the invention is inhaled using micropunch resonance sound-absorbing structure and aluminum fiber resonance
The dual resonance structure of acoustic form composition expands absorption band to improve the low frequency absorption coefficient of sound-absorbing material to greatest extent.It should
The absorption coefficient curve of kind material/structure is as shown in figure 4, it can be seen that this kind of material biases toward low frequency absorption, in 100Hz
Possess 0.3 or more acoustic absorptivity, in addition, all having higher acoustic absorptivity in 100~1600Hz (not less than 0.6).It is special
Not Shi Yongyu the power industries field low-frequency noise such as substation administer.And such material is all-aluminium construction, good weatherability, heat dissipation are excellent
It is good, convenient for recycle.
4, substation's noise control engineering:
In view of the noise characteristic of substation, environment influence situation and site space environmental quality, this substation's noise
Secondary structure of the control by emphasis for the main transformer core excitation electromagnetic vibration noise generated and vibrational excitation generation is made an uproar
Sound expansion, and by perfect sound field, flow field and fuel factor matched design, realize social environment benefit of substation and economic benefit
Perfection agree with, guarantee the good living environment of nearby residents.
According to various aspects actual states such as substation equipment distribution, building structure, environmental demands, propose in following design
Hold:
(1) the room sound field optimization of main transformer room and noise reduction:
The important link that sound field optimization design is substation's noise control is carried out to main transformer room.Room sound field optimization
Purpose is: on the one hand, effectively eliminating " standing wave " and " reverberation " effect in main transformer room, reduces the noise water of indoor sound source
It is flat；On the other hand, the low-frequency noise that common noise reduction means are difficult to eliminate effectively is absorbed, to prevent low-frequency noise to outdoor propagation,
Reach good noise control effect.
Currently, the inside dimension of main transformer of transformer substation room is 7.8m × 9m × 9.5m, rectangular configuration.According to indoor sound
Principle is learned, this structure feature will lead to indoor apparent " standing wave " and " reverberation " effect, and amplify the noise water of sound source device
It is flat.In order to effectively absorb low-frequency noise and reduce room noise level, the optimization for targetedly carrying out room sound field is needed to set
Meter lays the sound-absorbing material having compared with low-and high-frequency sound absorption effect in key position, this makes the installation position of sound field become noise reduction
The key of design.
For this purpose, the design first calculates the sound source characteristics of main transformer room and sound-filed simulation situation, pass through room
Interior acoustic simulation calculates analysis and practical experience analysis, to room sound field mode harmony buckling law carried out parsing with again
Structure, and the main orientation and parameter for influencing sound field variation has been determined.
Binding isotherm and practical experience, the position for influencing noise most critical in main transformer room at present are set positioned at main transformer
At the wall surface on standby periphery.It is calculated through theoretical and empirical equation, being related to wall surface area (separate room) lower limit is about 129.36m2, height
Range is about 3.86m (portion is highly made the appropriate adjustments due to safe distance).Implement in engineering, due to Party A couple
Appearance has coherence request, therefore sound absorption wall surface is improved to 5.5 meters.
In view of this, according to the Practical Project need of novel low-frequency composite sound-absorbing material/structure sound absorption feature and transformer chamber
It wants (design margin and Party A's appearance requirement), the novel sound-absorbing material/structural area of separate room main transformer room wall surface design arrangement
185m2, sound-absorbing material/structure will be laid in indoor wall surface position in the form of framework absorbs sound wall surface, and sound-absorbing material/structure is high
5.5m is spent, is arranged along transformer chamber's wall, the sound absorption wall surface control overall thickness of the components such as framework, gusset and sound-absorbing material composition does not surpass
Cross 0.16m.Through design accounting, novel sound-absorbing material/structural wall of laying can effectively absorb the low-frequency noise of main transformer sending,
The reflection, scattering of sound wave and reflected effect, reach the design object of indoor sqouynd absorption lowering noise in control room.
(2) sound insulation and noise reducing of main transformer room:
The sound insulation and noise reducing of main transformer room designs, and is primarily directed to the maintenance door of transformer chamber north and south side, which is
The weak link of sound insulation.Since main transformer room can be exchanged and can be propagated by the weak link with extraneous sound, thus need into
Row sound insulation processing.The maintenance door of main transformer room is changed to high-efficiency sound insulating door by this project, with prevent noise by door body transmit to
Outdoor propagation.Specific steps are as follows: install opposite opened soundproof door in original big outer side of door, every main transformer room designs soundproof door 1
~3.Door body and the progress of novel sound-absorbing material are compound, and novel sound-absorbing material is placed on the inside of soundproof door, guarantees the sound insulation of door body
With low frequency absorption double action；Light sound-proof wall is designed above soundproof door, is placed in novel sound-absorbing material on the inside of wall.Synthesis is examined
Consider sound absorption effect and carrying support situation, design margin is enough that wall is made to have sound insulation and effect of low-frequency sound absorption；Soundproof door uses
Pre-buried structure mode is fixed；The support steel beam into 1 2.0m high is disposed in sound insulation doorframe, supports top jointly with pre-buried structure
Light sound-proof wall guarantees integrally-built safe and reliable use.
(3) ventilation and heat and noise reduction of main transformer room:
The comprehensive design that flow field, fuel factor and noise control are carried out to main transformer room is to guarantee that transformer equipment is safe, steady
Fixed, low noise operation important prerequisite.In ambient temperature and humidity in the biggish situation of higher and apparatus of load, main transformer would generally
Generate biggish heat, it is contemplated that the cooling fin of main transformer is arranged in outdoor, and only partial heat discharges indoors, therefore can
Carry out corresponding ventilation and heat design.For this reason, it may be necessary to ventilation and heat and noise control demand be comprehensively considered, on the one hand to main transformer
The air flow field of depressor room is rationally designed, and guarantees that transformer equipment can be in the safety fortune under limiting condition and environmental condition
Row；On the other hand, Noise Control Design is carried out to main transformer room ventilation and heat link, it is ensured that the essence of this link and other links
Really matching, guarantees the whole noise reduction effect of substation.
Currently, the aeration structure of main transformer room is main are as follows: the ventilation opening 4 of every room unilateral side wall arrangement 1.5m × 0.9m
It is a, there is ventilation opening 1 of diameter 0.5m above transformer chamber southern side.
It is set according to the related data at the station analogy B and A station owner transformer room internal-external temperature difference situation, transformer performance, interior
Count the parameters such as structure, room air flow field condition calculated first, convection current field distribution, circulation path, flow direction, flow velocity,
The multiple parameters such as cyclone distribution are analyzed, the Flow Field Distribution in transformer chamber's ventilation window section, with exhaust outlet not at same section
On face, when simulation calculation, has been carried out comprehensive analysis of transformer chamber into air draft.
Proved through design, room air flow field can by be arranged above main transformer blower and air exhausting soundproofing system with
And reach relatively reasonable distribution characteristics in lower section setting ventilating noise-elimination system, it can be realized the mesh that transformer equipment effectively radiates
Mark.Meanwhile the position of cooling fan is laid and compares analysis, it is contemplated that the hot-fluid directive property of room air chooses room
Best installation position of the interior top ventilation opening as cooling fan.Fan delivery and total pressure force parameter, according to temperature rise, environment and room
External and internal compositions Parameters Calculation, 1 typhoon amount are 6000m3/ h, the axial flow blower of total pressure 100Pa, can satisfy in transformer chamber completely
Ventilation and heat.
Under the premise of guaranteeing ventilation and heat, the noise control into exhaust outlet is devised specifically for indoor ventilating radiating feature
Measure processed is mainly used for blocking indoor transformer equipment that can exchange with outdoor sound.Wherein, the top air intake/outtake system of transformer chamber is adopted
With silent ventilator 4, cable interlayer air intake/outtake system uses blower 5, and switch gear room's air intake/outtake system uses silent ventilator 4
Platform.In addition, in order to guarantee to exhaust system noise control, to each air intake/outtake system largely using Soundproofing static pressure box, silencer,
The equipment such as bend muffler.
(4) it makes an inspection tour, overhaul and relevant design when overhaul for main transformer room:
This noise-reducing design has fully considered the correlation circumstance of main transformer tour, maintenance and overhauling reform, has reserved phase
The space answered.
Daily tour for main transformer room, this secondary design remain original personnel's Vomitory, indoor wall surface
The wall thickness that absorbs sound is no more than 0.16m, does not occupy the working space of tour personnel, will not influence normal tour work.
Maintenance repair for main transformer room is negotiated according to related to client, and the component of maintenance can pass through
Soundproof door disengaging；When necessary, absorb sound wall surface quick release, and all design can meet maintenance needs.
For the overhauling reform of main transformer room, silencer and sound absorption wall surface on related wall are design for disassembly,
To facilitate disassembly and installation when overhauling reform, guarantee that is worked normally goes on smoothly.
5, noise reduction engineering implementation result:
After being put into operation according to substation noise reduction measure actual test as a result, the noise reduction effect of available each noise reduction measure such as
Shown in table 1.
The actual measurement noise reduction effect of 1 substation's noise reduction measure of table is had a guide look of
| Serial number | Noise reduction measure title | The noise reduction that scene uses |
| 1 | Roof air-discharge silencer | 14.3dB |
| 2 | Roof silent ventilator | Exhaust outlet noise 57.9dB (A) |
| 3 | Transformer chamber's sound absorption wall surface | 8.1dB (low frequency 10.8dB) |
| 4 | Transformer chamber's soundproof door | 17.2dB |
| 5 | Transformer chamber's ventilating noise-elimination plenum chamber | 20.1dB |
| 6 | Switch gear room's fans silencer | 20.9dB |
| 7 | Basement one pipeline silencer | 30.5dB |
When measuring station circle noise, since operating condition and condition limit, it mainly is provided with measuring point on substation southern side station circle, sees figure
Shown in 4.Fig. 5 is the station each measuring point spectrum signature in circle.
By station circle's frequency spectrum it is found that station circle's displacement noise sound level is about 43.61dB (A), GB12348I class sound is fully met
The requirement of environmental function zone emission limit.
Fig. 6 is environmental background noise spectrum signature, can be calculated from figure, the environmental background noise of substation is about
43.37dB (A), it is smaller with station circle's displacement noise difference, illustrate that external interference is smaller when measurement, measurement data is effective.
It applies the technical scheme of the present invention after the completion of construction, measuring station circle's noise is 43.61dB (A), meets I class acoustic environment
The standard of functional areas.The method adheres to environmentally protective theory, using new material, new technology, new process to newly-built substation into
Row noise-reducing design is effectively controlled station circle's noise emission, is same type substation under the increasingly strict situation of environmental requirement
Design provide reference.
It should be understood that the particular order or level of the step of during disclosed are the examples of illustrative methods.Based on setting
Count preference, it should be appreciated that in the process the step of particular order or level can be in the feelings for the protection scope for not departing from the disclosure
It is rearranged under condition.Appended claim to a method is not illustratively sequentially to give the element of various steps, and not
It is to be limited to the particular order or level.
In above-mentioned detailed description, various features are combined together in single embodiment, to simplify the disclosure.No
This published method should be construed to reflect such intention, that is, the embodiment of theme claimed needs clear
The more features of the feature stated in each claim to Chu.On the contrary, that reflected such as appended claims
Sample, the present invention are in the state fewer than whole features of disclosed single embodiment.Therefore, appended claims is special
This is expressly incorporated into detailed description, and wherein each claim is used as alone the individual preferred embodiment of the present invention.
Description above includes the citing of one or more embodiments.Certainly, in order to describe above-described embodiment and description portion
The all possible combination of part or method is impossible, but it will be appreciated by one of ordinary skill in the art that each implementation
Example can do further combinations and permutations.Therefore, embodiment described herein is intended to cover fall into the appended claims
Protection scope in all such changes, modifications and variations.In addition, with regard to term used in specification or claims
The mode that covers of "comprising", the word is similar to term " includes ", just as " including " solved in the claims as transitional word
As releasing.
The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, although referring to above-described embodiment pair
The present invention is described in detail, those of ordinary skill in the art still can to a specific embodiment of the invention into
Row modification perhaps equivalent replacement these without departing from any modification of spirit and scope of the invention or equivalent replacement, applying
Within pending claims of the invention.
Claims (6)
1. a kind of substation's noise-reduction method is a kind of noise-reduction method used to the plan of newly-built substation, which is characterized in that described
Method includes the following steps:
(1) reference station is selected, predicts the noise spectrum feature and propagation effect rule of the substation；
(2) type selecting and application design of noise reduction sound-absorbing material and device；
(3) the comprehensive Noise Reduction scheme based on finite element analysis is determined；
In the step (1), according to the equipment list of the buider's work drawing of the construction of transformer substation and quasi- buying, power transformation station owner is grasped
Sound source device and topology layout are wanted, equipment brand and model and manufacturer's information are investigated；Reselection and the substation structure cloth
The reference station of office's same approach, analyzes sound source device near field, far-field noise and ginseng in the reference station using sound level meter field survey
Than the station circle noise at station, and the Noise map at reference station is drawn, the noise spectrum characteristics and propagation effect as the substation
The analysis foundation of rule, to predict the noise spectrum feature and propagation effect rule of the substation；
The spectrogram of in reference station and station circle's noise is obtained using sound level meter measurement, determines the distribution frequency range of noise acoustic energy；
According to the Noise map at reference station, analysis can effectively carry out the key node of noise control, including noise source, noise pass
It broadcasts approach and sensitive point for noise, observes the far and near field noise sound level of main transformer and its cooling system, the door and window of transformer chamber, into row
Noise sound level and propagation attenuation feature within the scope of the circle periphery 50m of at wind passway and station.
2. noise-reduction method as described in claim 1, which is characterized in that special according to substation's noise in the step (2)
Point carries out noise reduction sound-absorbing material, the type selecting of construction and device and application design；The sound absorption ridge curves of the noise reduction sound-absorbing material
The distribution frequency range of noise acoustic energy is covered, construction and device meets the premise operated normally in the interior electrical equipment that do not influence to stand
Under, the requirement that is mounted at key node.
3. noise-reduction method as claimed in claim 2, which is characterized in that the noise reduction sound-absorbing material is using framework sound absorption wall surface shape
The double resonance low frequency composite sound-absorbing material of microperforated panel and aluminum fiberboard composition is laid in wall surface position in substation room by formula,
When the noise reduction sound-absorbing material is used for the low frequency absorption of 100Hz, the noise reduction sound-absorbing material has 0.3 or more acoustic absorptivity；
When high frequency of the noise reduction sound-absorbing material for 100~1600Hz absorbs sound, to possess the sound absorption material that acoustic absorptivity is not less than 0.6
Material.
4. noise-reduction method as claimed in claim 2 or claim 3, which is characterized in that the noise reduction sound-absorbing material is micropore-fiber composite
Sound-absorbing material, and it is processed into sound absorption wall surface, sound absorption door and muffler.
5. noise-reduction method as described in claim 1, which is characterized in that described based on finite element analysis in the step (3)
Comprehensive Noise Reduction scheme includes: the installation of the power transformation station cable interlayer into air exhausting soundproofing system；Air draft at the top of main transformer room
The installation of sound-attenuating system；The installation of the installation of sound absorption wall surface and sound-attenuating system and main transformer room soundproof door in main transformer room.
6. noise-reduction method as claimed in claim 5, which is characterized in that the power transformation station cable interlayer is into air exhausting soundproofing system
Installation include: in substation cable interlayer into air exhaust passage installation Soundproofing static pressure box, bend muffler and 1~6 low noise wind
Machine, fan noise are lower than 60dB；
The installation of air exhausting soundproofing system includes: that each main transformer room unilateral side wall arranges 3~6 at the top of the main transformer room
Ventilation opening, the ventilation opening of 1~3 diameter 0.5m is provided on each main transformer room roof；And Soundproofing static pressure box is installed, is disappeared
Sound device and 1~6 silent ventilator, fan noise are lower than 60dB；
The installation of sound absorption wall surface and sound-attenuating system includes: noise reduction sound-absorbing material with framework sound absorption wall surface in the main transformer room
Form is laid in main transformer room inner wall position；In main transformer room into installing Soundproofing static pressure box in air exhaust passage, eliminate the noise
Device, bend muffler and 2~6 silent ventilators, fan noise are lower than 60dB；
The installation of transformer room's soundproof door includes: in original big outer side of door installation opposite opened soundproof door, every main transformer
Design soundproof door 1~3 in room；Soundproof door door body carries out compound, the merging noise reduction sound absorption on the inside of soundproof door with noise reduction sound-absorbing material
Material, to guarantee the sound insulation and low frequency absorption double action of soundproof door door body；Light sound-proof wall, wall are designed above soundproof door
Inside is placed in noise reduction sound-absorbing material；Gather sound absorption effect and carrying support situation design margin so that wall have sound insulation and it is low
Frequency sound absorption effect；Soundproof door is fixed using pre-buried structure mode；It disposes in sound insulation doorframe into support steel beam, it is common with pre-buried structure
The light sound-proof wall of top is supported, guarantees integrally-built safe and reliable use.
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| CN108266014A (en) * | 2017-12-19 | 2018-07-10 | 杭州意能电力技术有限公司 | A kind of substation's Noise Controlling in Comprehensive method |
| CN110049403A (en) * | 2018-01-17 | 2019-07-23 | 北京小鸟听听科技有限公司 | A kind of adaptive audio control device and method based on scene Recognition |
| US10979814B2 (en) | 2018-01-17 | 2021-04-13 | Beijing Xiaoniao Tingling Technology Co., LTD | Adaptive audio control device and method based on scenario identification |
| CN108897901A (en) * | 2018-03-29 | 2018-11-27 | 云南电网有限责任公司 | A kind of control method and system of indoor substation noise |
| CN111369965B (en) * | 2020-03-02 | 2023-09-19 | 青岛海尔空调器有限总公司 | Air conditioner muffler determining method and device, storage medium and electronic equipment |
| CN111368479B (en) * | 2020-03-06 | 2022-04-05 | 华北电力大学（保定） | Preparation method of lightweight composite phononic crystal sheet for transformer substation noise reduction |
| CN111696768B (en) * | 2020-05-13 | 2023-04-11 | 云南电网有限责任公司 | Outdoor transformer noise reduction method |
| CN112576553A (en) * | 2020-12-22 | 2021-03-30 | 国家电网有限公司 | Main transformer noise reduction method for outdoor transformer substation |
| CN113916357A (en) * | 2021-09-03 | 2022-01-11 | 中国电力科学研究院有限公司 | Method and system for denoising station boundary noise measured value of flow conversion station |
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Address after: 102209 Beijing City, Changping District science and Technology Park in the future smart grid research institute hospital Applicant after: GLOBAL ENERGY INTERCONNECTION Research Institute Applicant after: State Grid Corporation of China Applicant after: STATE GRID ZHEJIANG ELECTRIC POWER COMPANY JINHUA POWER SUPPLY Co. Address before: 102211 Beijing city Changping District Xiaotangshan town big East Village Road No. 270 (future technology city) Applicant before: STATE GRID SMART GRID Research Institute Applicant before: State Grid Corporation of China Applicant before: STATE GRID ZHEJIANG ELECTRIC POWER COMPANY JINHUA POWER SUPPLY Co. |
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Effective date of registration: 20170921 Address after: 310007 Huanglong Road, Zhejiang, Hangzhou, No. 8 Applicant after: STATE GRID ZHEJIANG ELECTRIC POWER Co. Applicant after: State Grid Corporation of China Applicant after: GLOBAL ENERGY INTERCONNECTION Research Institute Applicant after: STATE GRID ZHEJIANG ELECTRIC POWER COMPANY JINHUA POWER SUPPLY Co. Address before: 102209 Beijing City, Changping District science and Technology Park in the future smart grid research institute hospital Applicant before: GLOBAL ENERGY INTERCONNECTION RESEARCH INSTITUTE Applicant before: State Grid Corporation of China Applicant before: STATE GRID ZHEJIANG ELECTRIC POWER COMPANY JINHUA POWER SUPPLY Co. |
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