CN106286362B - Fan for cooling transformer evaluation of running status method and system based on noise - Google Patents
Fan for cooling transformer evaluation of running status method and system based on noise Download PDFInfo
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- CN106286362B CN106286362B CN201610584621.8A CN201610584621A CN106286362B CN 106286362 B CN106286362 B CN 106286362B CN 201610584621 A CN201610584621 A CN 201610584621A CN 106286362 B CN106286362 B CN 106286362B
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- 238000001816 cooling Methods 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000011156 evaluation Methods 0.000 title claims abstract description 20
- 230000002159 abnormal effect Effects 0.000 claims abstract description 10
- 238000001514 detection method Methods 0.000 claims abstract description 5
- 238000000605 extraction Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 7
- 230000008859 change Effects 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000004590 computer program Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007630 basic procedure Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention discloses a kind of fan for cooling transformer evaluation of running status method and system based on noise, method and step includes detection transformer and selectes the noise signal of noise measuring point and extract noise signal characteristic parameter, noise signal characteristic parameter and default noise signal characteristic parameter threshold are contrasted, if noise signal characteristic parameter exceedes default noise signal characteristic parameter threshold, then judge that fan for cooling transformer running status is abnormal, otherwise judge that cooling fan running status is normal；System includes noise signal detection program unit, characteristic parameter extraction program unit and fan running status determining program unit.The present invention can judge the running status of fan for cooling transformer by noise measuring, running status, convenient test without changing transformer, without contacting charging equipment, detect safe, test accurately and reliably.
Description
Technical field
The present invention relates to electric power safety monitoring technology, and in particular to a kind of fan for cooling transformer operation shape based on noise
State evaluation method and system.
Background technology
With the continuous increase and the continuous improvement of urban construction speed of power network scale, increasing transformer station is in
Around city neighborhood.Many put into operation time more long 110kV with 220kV transformer stations still using the main transformer with cooling fan
Depressor, causes transformer station's influence of noise outstanding problem, around the relevant complaint of the type transformer station noise problem and dispute quantity
Constantly rise.Transformer noise is divided into this bulk noise and cooling fan noise, wherein, cooling fan has and transformer body phase
When noise level.The too high cooling fan running status that is largely because of transformer noise level is extremely caused, because
This, fan for cooling transformer evaluation of running status has practical significance for transformer noise control.At present, cold to transformer
But when fan running status is evaluated, mainly using sound level meter to measure respectively, cooling fan is put into operation and cooling fan is stopped
The transformer noise level under two kinds of methods of operation is transported, and the method subtracted each other using sound pressure level determines fan noise value, according to this
Noise figure and the running status of the multilevel iudge cooling fan of fan nameplate indicating value.This method is primarily present following deficiency：1st, should
Method needs to change the method for operation of transformer, is likely to result in that temperature of oil in transformer is too high, is unfavorable for the safe operation of equipment；2nd, should
Method can not direct measurement cooling fan noise, it is necessary to carry out multiple repeated measurement to noise of equipment, the testing time is longer.
The content of the invention
The technical problem to be solved in the present invention：Above mentioned problem for prior art can be examined there is provided one kind by noise
The running status for judging fan for cooling transformer is surveyed, running status, convenient test without changing transformer are powered without contacting
Equipment, detection is safe, tests fan for cooling transformer evaluation of running status method accurately and reliably based on noise and is
System.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：
On the one hand, the present invention provides a kind of fan for cooling transformer evaluation of running status method based on noise, step bag
Include：
1）Detect that transformer selectes the noise signal of noise measuring point；
2）Noise signal characteristic parameter is extracted for noise signal；
3）Noise signal characteristic parameter and default noise signal characteristic parameter threshold are contrasted, if noise signal
Characteristic parameter exceedes default noise signal characteristic parameter threshold, then judges that fan for cooling transformer running status is abnormal, otherwise
Judge that cooling fan running status is normal.
Preferably, step 1）In selected noise measuring point be located at the positive 1/2 transformer height of transformer and apart from transformation
Device 1m.
Preferably, step 2）In noise signal characteristic parameter be noise signal non-50Hz harmonics energy proportion, it is described
Non- 50Hz harmonics energy proportion be in 2kHz frequency ranges the amplitude of non-50Hz and its harmonics frequency noise signal and with 2kHz frequencies
The ratio of all frequency noise signal amplitude sums in the range of rate.
Preferably, step 3）In the determination step of default noise signal characteristic parameter threshold include：
S1）Detect that transformer is selecting noise signal and extraction of the noise measuring point under cooling fan normal operating condition just
Normal noise signal characteristic parameter；
S2）Maximum is selected from normal noise signal characteristic parameter, is believed multiplied by default noise is obtained with preset multiple
Number characteristic parameter threshold.
Preferably, the preset multiple is 1.5 times.
Preferably, the cooling fan normal operating condition specifically refers to the noise figure of selected noise measuring point in cooling
Fan puts into operation front and rear difference within 3dB (A).
On the other hand, the present invention also provides a kind of fan for cooling transformer evaluation of running status system based on noise, wraps
Include：
Noise signal detects program unit, for detecting that transformer selectes the noise signal of noise measuring point；
Characteristic parameter extraction program unit, for extracting noise signal characteristic parameter for noise signal；
Fan running status determining program unit, for noise signal characteristic parameter and default noise signal feature to be joined
Number threshold value is contrasted, if noise signal characteristic parameter exceedes default noise signal characteristic parameter threshold, judges transformation
Device cooling fan running status is abnormal, otherwise judges that cooling fan running status is normal.
Fan for cooling transformer evaluation of running status method tool of the present invention based on noise has the advantage that：Present invention detection
Transformer selectes the noise signal of noise measuring point, and noise signal characteristic parameter is extracted for noise signal, and noise signal is special
Levy parameter and default noise signal characteristic parameter threshold is contrasted, if noise signal characteristic parameter exceedes default noise
Signal characteristic parameter threshold value, then judge that fan for cooling transformer running status is abnormal, is otherwise judging cooling fan running status just
Often, the running status of fan for cooling transformer can be judged by noise measuring, with need not change transformer running status,
Convenient test, without contacting charging equipment, detects safe, test accurately and reliably advantage.
Fan for cooling transformer evaluation of running status system of the invention based on noise is the transformation of the invention based on noise
Device cooling fan evaluation of running status method corresponding device completely, therefore equally also there is the transformer of the invention based on noise
The aforementioned advantages of cooling fan evaluation of running status method, therefore will not be repeated here.
Brief description of the drawings
Fig. 1 is the basic procedure schematic diagram of present invention method.
Embodiment
As shown in figure 1, the step of fan for cooling transformer evaluation of running status method of the present embodiment based on noise includes：
1）Detect that transformer selectes the noise signal of noise measuring point；
2）Noise signal characteristic parameter is extracted for noise signal；
3）Noise signal characteristic parameter and default noise signal characteristic parameter threshold are contrasted, if noise signal
Characteristic parameter exceedes default noise signal characteristic parameter threshold, then judges that fan for cooling transformer running status is abnormal, otherwise
Judge that cooling fan running status is normal.
In the present embodiment, step 1）In selected noise measuring point be located at the positive 1/2 transformer height of transformer and distance
Transformer 1m.
In the present embodiment, step 2）In noise signal characteristic parameter be noise signal non-50Hz harmonics energy proportion,
Non- 50Hz harmonics energy proportion be in 2kHz frequency ranges the amplitude of non-50Hz and its harmonics frequency noise signal and with 2kHz frequencies
The ratio of all frequency noise signal amplitude sums in the range of rate.Transformer noise is transformer body noise and cooling fan noise
The result being overlapped mutually.Due to the electrodynamic reciprocation of periodicity between magnetostriction unshakable in one's determination and winding, for power frequency
50Hz AC systems, the noise spectrum of transformer body is concentrated mainly on the 50Hz in the range of 2kHz and its integer multiple frequency.
The characteristics of cooling fan noise has white noise, in addition to speed itself, remaining noise frequency be distributed in the range of 2kHz compared with
To be uniform, it is not limited solely on 50Hz and its integer multiple frequency.Therefore, when fan for cooling transformer because run time too long and
When deteriorating, each Frequency point noise amplitude will change in its frequency band range, and using 50Hz and its integer multiple frequency as spy
The transformer body noise for levying frequency does not change.Therefore, choosing non-50Hz harmonics energy ratio recast in noise signal is
The characteristic parameter that cooling fan running status judges can obtain preferable effect.
In the present embodiment, step 3）In the determination step of default noise signal characteristic parameter threshold include：
S1）Detect that transformer is selecting noise signal and extraction of the noise measuring point under cooling fan normal operating condition just
Normal noise signal characteristic parameter；
S2）Maximum is selected from normal noise signal characteristic parameter, is believed multiplied by default noise is obtained with preset multiple
Number characteristic parameter threshold；In the present embodiment, cooling fan normal operating condition specifically refers to the noise figure of selected noise measuring point
Difference before and after cooling fan puts into operation is within 3dB (A).
In the present embodiment, detection transformer selectes noise signal of the noise measuring point under cooling fan normal operating condition
And it is 0.197 to extract noise signal characteristic parameter maximum.In the present embodiment, preset multiple is 1.5 times, therefore 0.197 is multiplied by
It is 0.296 that default noise signal characteristic parameter threshold is obtained after preset multiple.It is super to another run time in the present embodiment
Cross 20 years and cooling fan has abnormal transformer noise signal and detected that the characteristic parameter of the transformer noise signal is
0.331, because the transformer noise signal characteristic parameter is more than default noise signal characteristic parameter threshold (i.e. 0.296), because
This, judges that fan for cooling transformer running status is abnormal, the judged result is consistent with actual conditions.
Fan for cooling transformer evaluation of running status method of the present embodiment based on noise is specifically to be based on computer program
Come what is realized, the fan for cooling transformer evaluation of running status system based on noise realized based on computer program is included：
Noise signal detects program unit, for detecting that transformer selectes the noise signal of noise measuring point；
Characteristic parameter extraction program unit, for extracting noise signal characteristic parameter for noise signal；
Fan running status determining program unit, for noise signal characteristic parameter and default noise signal feature to be joined
Number threshold value is contrasted, if noise signal characteristic parameter exceedes default noise signal characteristic parameter threshold, judges transformation
Device cooling fan running status is abnormal, otherwise judges that cooling fan running status is normal.
Described above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art
Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (5)
1. a kind of fan for cooling transformer evaluation of running status method based on noise, it is characterised in that step includes：
1）Detect that transformer selectes the noise signal of noise measuring point, the selected noise measuring point is located at transformer front 1/2
Transformer is highly and apart from transformer 1m；
2）Noise signal characteristic parameter is extracted for noise signal, the noise signal characteristic parameter is the non-50Hz of noise signal
Harmonics energy proportion, the non-50Hz harmonics energy proportion is non-50Hz and its harmonics frequency noise signal in 2kHz frequency ranges
Amplitude and with all frequency noise signal amplitudes in 2kHz frequency ranges and ratio；
3）Noise signal characteristic parameter and default noise signal characteristic parameter threshold are contrasted, if noise signal feature
Parameter exceedes default noise signal characteristic parameter threshold, then judges that fan for cooling transformer running status is abnormal, otherwise judge
Cooling fan running status is normal.
2. the fan for cooling transformer evaluation of running status method according to claim 1 based on noise, it is characterised in that
Step 3）In the determination step of default noise signal characteristic parameter threshold include：
S1）Detection transformer is selected noise signal and extraction of the noise measuring point under cooling fan normal operating condition and normally made an uproar
Acoustical signal characteristic parameter；
S2）Maximum is selected from normal noise signal characteristic parameter, it is special multiplied by default noise signal is obtained with preset multiple
Levy parameter threshold.
3. the fan for cooling transformer evaluation of running status method according to claim 2 based on noise, it is characterised in that
The preset multiple is 1.5 times.
4. the fan for cooling transformer evaluation of running status method according to claim 2 based on noise, it is characterised in that
The cooling fan normal operating condition specifically refers to difference of the noise figure of selected noise measuring point before and after cooling fan puts into operation
Value is within 3dB (A).
5. a kind of fan for cooling transformer evaluation of running status system based on noise, it is characterised in that including：
Noise signal detects program unit, for detecting that transformer selectes the noise signal of noise measuring point, selectes noise measuring
Point is located at the positive 1/2 transformer height of transformer and apart from transformer 1m；
Characteristic parameter extraction program unit, for extracting noise signal characteristic parameter for noise signal, the noise signal is special
The non-50Hz harmonics energy proportion that parameter is noise signal is levied, the non-50Hz harmonics energy proportion is non-in 2kHz frequency ranges
The amplitude of 50Hz and its harmonics frequency noise signal and with all frequency noise signal amplitudes in 2kHz frequency ranges and ratio；
Fan running status determining program unit, for by noise signal characteristic parameter and default noise signal characteristic parameter threshold
Value is contrasted, if noise signal characteristic parameter exceedes default noise signal characteristic parameter threshold, judges that transformer is cold
But fan running status is abnormal, otherwise judges that cooling fan running status is normal.
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| CN201610584621.8A CN106286362B (en) | 2016-07-22 | 2016-07-22 | Fan for cooling transformer evaluation of running status method and system based on noise |
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| CN201610584621.8A CN106286362B (en) | 2016-07-22 | 2016-07-22 | Fan for cooling transformer evaluation of running status method and system based on noise |
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| CN106286362A CN106286362A (en) | 2017-01-04 |
| CN106286362B true CN106286362B (en) | 2017-10-24 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108401401B (en) * | 2018-04-03 | 2020-02-04 | 上海斐讯数据通信技术有限公司 | Air-cooled heat dissipation device, heat dissipation method and electronic equipment |
| CN114279727B (en) * | 2021-12-03 | 2024-02-09 | 国网江苏省电力有限公司宿迁供电分公司 | Method for judging aging of transformer cooling device |
| CN114299990A (en) * | 2022-01-28 | 2022-04-08 | 杭州老板电器股份有限公司 | Method and system for controlling abnormal sound identification and audio injection of range hood |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104156554A (en) * | 2014-05-23 | 2014-11-19 | 国家电网公司 | Method for recording and evaluating noise of transformer |
| CN104314851A (en) * | 2014-10-16 | 2015-01-28 | 国家电网公司 | Monitoring device for running state of transformer fan |
| CN104964738A (en) * | 2015-06-10 | 2015-10-07 | 国家电网公司 | Noise separation-based power transformer noise assessment method |
| CN105508276A (en) * | 2015-12-08 | 2016-04-20 | 国家电网公司 | Method for evaluating noise of main transformer fan of urban transformer substation |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002151334A (en) * | 2000-08-28 | 2002-05-24 | Hitachi Ltd | Transformer with cooling unit |
| TR201311489A2 (en) * | 2013-10-01 | 2014-12-22 | Canovate Elektronik Enduestri Ve Ticaret Anonim Sirketi | Smart power distribution unit with energy consumption meter |
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- 2016-07-22 CN CN201610584621.8A patent/CN106286362B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104156554A (en) * | 2014-05-23 | 2014-11-19 | 国家电网公司 | Method for recording and evaluating noise of transformer |
| CN104314851A (en) * | 2014-10-16 | 2015-01-28 | 国家电网公司 | Monitoring device for running state of transformer fan |
| CN104964738A (en) * | 2015-06-10 | 2015-10-07 | 国家电网公司 | Noise separation-based power transformer noise assessment method |
| CN105508276A (en) * | 2015-12-08 | 2016-04-20 | 国家电网公司 | Method for evaluating noise of main transformer fan of urban transformer substation |
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