CN101793548A - Device and method for coherent separation of noise of equipment of direct-current convertor station - Google Patents
Device and method for coherent separation of noise of equipment of direct-current convertor station Download PDFInfo
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- CN101793548A CN101793548A CN201010134692A CN201010134692A CN101793548A CN 101793548 A CN101793548 A CN 101793548A CN 201010134692 A CN201010134692 A CN 201010134692A CN 201010134692 A CN201010134692 A CN 201010134692A CN 101793548 A CN101793548 A CN 101793548A
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Abstract
The invention discloses a device and a method for the coherent separation of the noise of the equipment of a direct-current convertor station. A sound transmission device and a laser vibration measurer are respectively arranged outside equipment to be measured, a noise signal and a vibration signal of the equipment to be measured are respectively measured by the sound transmission device and the laser vibration measurer, and coherence analysis is carried out on the noise signal and the vibration signal by a computer, i.e. the noise at the position of a frequency with large coherence value is generated by the equipment when working, and the noise at the position of a frequency with small coherence value (such as smaller than 0.8 under a given confidence) is not caused by the vibration of the equipment to be measured. The invention does not need to contact with the equipment to be measured, can remotely measure the vibration and the noise of the equipment to be measured, avoids high-voltage danger and guarantees the safety of instruments; and by utilizing the coherence between the vibration and the noise, the noise spectrum and the noise magnitude of certain equipment can be separated from a complicated place with the together radiating noise of various kinds of equipment.
Description
Technical field
The present invention relates to the relevant separation technology field of noise, be specifically related to the relevant apparatus and method of separating of a kind of noise of equipment of direct-current convertor station.
Background technology
HVDC converter substation (hereinafter to be referred as current conversion station) is the place that a kind of strong noise is polluted, and the noise of each equipment is the major measure of preventing and treating noise pollution in the control current conversion station.Must know the size and the characteristics of each noise of equipment radiation when the opertaing device noise, this just needs accurately to measure the noise of the independent radiation of each equipment.
In current conversion station, exist the equipment of number of different types, even same kind equipment, the situation that also exists many equipment to move simultaneously, this just makes the interference that overlaps mutually of noise in the HVDC converter substation, the noise that any point place is measured around arbitrary equipment all is their superposition value, and sound field is very complicated in the current conversion station.At present, in order to measure the noise of each equipment of current conversion station, all adopt sound meter near each equipment, to carry out ordinary surveying.Because all having high voltage, each equipment do not allow very easily to be subjected to other equipment operation interference of noise when far away again apart from equipment near measuring.
Therefore, the accurate noise of measuring a certain equipment is a very difficult thing in current conversion station.
Summary of the invention
The technical problem to be solved in the present invention provides the relevant apparatus and method of separating of a kind of noise of equipment of direct-current convertor station, utilize the coherence between vibration and the noise, isolate the noise spectrum and the noise value of a certain equipment from the place of the common radiated noise of plurality of devices of complexity.
For addressing the above problem, technical scheme of the present invention is:
A kind of noise of equipment of direct-current convertor station phase dry separation device is characterized in that: include DC converter station noise equipment under test, described equipment under test the place ahead is provided with directive property sound-conducting apparatus and the laser vibration measurer that points to equipment under test; Equipment under test also is respectively arranged with anti alias filter, data acquisition unit and computing machine outward, and the output terminal of described sound-conducting apparatus and laser vibration measurer is connected in series anti alias filter, data acquisition unit and computing machine successively by lead.
Described noise of equipment of direct-current convertor station phase dry separation device is characterized in that described sound-conducting apparatus includes cup-shaped acoustic shell, and an end of described cup-shaped acoustic shell is bigbore openend, and the other end is small-bore closed end; The shell of cup-shaped acoustic shell is a sound insulation value preferred metal body, and inwall and its small-bore closed end that gets of being close to cup-shaped acoustic shell are equipped with one deck acoustic absorbant; The place is equipped with amplifier along cup-shaped acoustic shell axis line inside, and an end of amplifier is fixedly connected with microphone, and the receiving plane of microphone is towards the heavy caliber openend of cup-shaped acoustic shell, and the other end of amplifier is imbedded in the acoustic absorbant and is connected to the lead of drawing.
A kind of noise of equipment of direct-current convertor station separation method that is concerned with is characterized in that: may further comprise the steps:
(1), spacing arranged outside DC converter station noise equipment under test a directive property sound-conducting apparatus and a laser vibration measurer be set respectively, and make the receiving end of directive property sound-conducting apparatus, laser vibration measurer emitted laser point to tested equipment of direct-current convertor station simultaneously;
(2), send during the equipment under test work that obtains by the directive property sound-conducting apparatus noise signal and the vibration signal on the equipment under test surface that records of laser vibration measurer respectively by filtering, and be converted to digital signal and send into computing machine and carry out frequency spectrum computing and coherence analysis;
(3), COMPUTER CALCULATION draws the noise signal of the same equipment under test that sends and the coherence function value of vibration signal (promptly relevant frequency spectrum), the noise spectrum of more same equipment under test and relevant frequency spectrum, by relatively drawing the noise source conclusion: the noise at the big frequency place of coherent value is the noise that this equipment surface vibration is produced, coherent value little (as, under given degree of confidence less than 0.8) the noise at frequency place be not that vibration by this equipment under test causes; That is to say that the noise at the big frequency place of coherent value is that institute is produced when being worked by this equipment under test, otherwise the noise at this frequency place just not that institute is produced when being worked by this equipment under test.
Beneficial effect of the present invention:
The present invention need not to contact with equipment under test, and vibration and noise that can the telemeasurement equipment under test have avoided that Keep Clear-High Voltage, have ensured the safety of instrument; And utilize coherence between vibration and the noise, can isolate the noise spectrum and the noise value of a certain equipment from the place of the common radiated noise of plurality of devices of complexity.
Description of drawings
Fig. 1 is apparatus of the present invention structural representation, and arrow points is represented the signal trend among the figure.
Fig. 2 is a sound-conducting apparatus structural representation of the present invention.
Embodiment
Referring to Fig. 1,2, a kind of noise of equipment of direct-current convertor station phase dry separation device, include equipment under test 1, equipment under test 1 outer directive property sound-conducting apparatus 2 and the laser vibration measurer 3 of being respectively arranged with, directive property sound-conducting apparatus 2 includes cup-shaped acoustic shell 4, one end of cup-shaped acoustic shell 4 is bigbore openend, and the other end is small-bore closed end; The shell of cup-shaped acoustic shell 4 is a sound insulation value preferred metal body, and inwall and its small-bore closed end that gets of being close to cup-shaped acoustic shell 4 are equipped with one deck acoustic absorbant 5; 4 axis line inside places are equipped with amplifier 7 along cup-shaped acoustic shell, one end of amplifier 7 is fixedly connected with microphone 8, and the receiving plane of microphone 8 is towards the heavy caliber openend of cup-shaped acoustic shell 4, and the other end of amplifier 7 is imbedded in the acoustic absorbant 5 and is connected to the lead 6 of drawing; Also be respectively arranged with anti alias filter 9, data acquisition unit 10 and computing machine 11 outside the equipment under test 1, the output terminal of sound-conducting apparatus 2 and laser vibration measurer 3 is connected in series anti alias filter 9, data acquisition unit 10 and computing machine 11 successively by lead.
A kind of noise of equipment of direct-current convertor station separation method that is concerned with may further comprise the steps:
(1), spacing arranged outside equipment under test a directive property sound-conducting apparatus and a laser vibration measurer be set respectively, and make the heavy caliber openend of directive property sound-conducting apparatus, laser vibration measurer emitted laser point to tested equipment of direct-current convertor station simultaneously;
(2), send during the equipment under test work that obtains by the directive property sound-conducting apparatus noise signal and the vibration signal on the equipment under test surface that records of laser vibration measurer respectively by filtering, and be converted to digital signal and send into computing machine and carry out frequency spectrum computing and coherence analysis;
(3), COMPUTER CALCULATION draws the noise signal of the same equipment under test that sends and the coherence function value of vibration signal (promptly relevant frequency spectrum), the noise spectrum of more same equipment under test and relevant frequency spectrum, by relatively drawing the noise source conclusion: the noise at the big frequency place of coherent value is the noise that this equipment surface vibration is produced, coherent value little (as, under given degree of confidence less than 0.8) the noise at frequency place be not that vibration by this equipment under test causes; That is to say that the noise at the big frequency place of coherent value is that institute is produced when being worked by this equipment under test, otherwise the noise at this frequency place just not that institute is produced when being worked by this equipment under test.
Claims (3)
1. noise of equipment of direct-current convertor station phase dry separation device is characterized in that: include DC converter station noise equipment under test, described equipment under test the place ahead is provided with directive property sound-conducting apparatus and the laser vibration measurer that points to equipment under test; Equipment under test also is respectively arranged with anti alias filter, data acquisition unit and computing machine outward, and the output terminal of described sound-conducting apparatus and laser vibration measurer is connected in series anti alias filter, data acquisition unit and computing machine successively by lead.
2. noise of equipment of direct-current convertor station phase dry separation device according to claim 1 is characterized in that described sound-conducting apparatus includes cup-shaped acoustic shell, and an end of described cup-shaped acoustic shell is bigbore openend, and the other end is small-bore closed end; The shell of cup-shaped acoustic shell is a sound insulation value preferred metal body, and inwall and its small-bore closed end that gets of being close to cup-shaped acoustic shell are equipped with one deck acoustic absorbant; The place is equipped with amplifier along cup-shaped acoustic shell axis line inside, and an end of amplifier is fixedly connected with microphone, and the receiving plane of microphone is towards the heavy caliber openend of cup-shaped acoustic shell, and the other end of amplifier is imbedded in the acoustic absorbant and is connected to the lead of drawing.
3. the relevant separation method of a noise of equipment of direct-current convertor station is characterized in that: may further comprise the steps:
(1), spacing arranged outside DC converter station noise equipment under test a directive property sound-conducting apparatus and a laser vibration measurer be set respectively, and make the receiving end of directive property sound-conducting apparatus, laser vibration measurer emitted laser point to tested equipment of direct-current convertor station simultaneously;
(2), send during the equipment under test work that obtains by the directive property sound-conducting apparatus noise signal and the vibration signal on the equipment under test surface that records of laser vibration measurer respectively by anti-aliasing filtering, and be converted to digital signal and send into computing machine and carry out frequency spectrum computing and coherence analysis;
(3), COMPUTER CALCULATION draws the noise signal of the same equipment under test that sends and the coherence function value of vibration signal (promptly relevant frequency spectrum), the noise spectrum of more same equipment under test and relevant frequency spectrum, by relatively drawing the noise source conclusion: the noise at the big frequency place of coherent value is the noise that this equipment surface vibration is produced, coherent value little (as, under given degree of confidence less than 0.8) the noise at frequency place be not that vibration by this equipment under test causes; That is to say that the noise at the big frequency place of coherent value is that institute is produced when being worked by this equipment under test, otherwise the noise at this frequency place just not that institute is produced when being worked by this equipment under test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201010134692A CN101793548A (en) | 2010-03-25 | 2010-03-25 | Device and method for coherent separation of noise of equipment of direct-current convertor station |
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| CN201010134692A CN101793548A (en) | 2010-03-25 | 2010-03-25 | Device and method for coherent separation of noise of equipment of direct-current convertor station |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103765175A (en) * | 2011-07-01 | 2014-04-30 | 英特尔公司 | Identifying electrical sources of acoustic noise |
| CN106323447A (en) * | 2016-10-18 | 2017-01-11 | 南京航空航天大学 | Portable laser vibrometer based on mobile phone and method thereof |
| CN107272482A (en) * | 2017-06-02 | 2017-10-20 | 杭州亿恒科技有限公司 | Power capacitor noise control method based on Vibration Active Control |
| CN112729528A (en) * | 2020-12-07 | 2021-04-30 | 潍柴动力股份有限公司 | Noise source identification method, device and equipment |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103765175A (en) * | 2011-07-01 | 2014-04-30 | 英特尔公司 | Identifying electrical sources of acoustic noise |
| CN103765175B (en) * | 2011-07-01 | 2016-09-07 | 英特尔公司 | Identify the electricity source of acoustic noise |
| CN106323447A (en) * | 2016-10-18 | 2017-01-11 | 南京航空航天大学 | Portable laser vibrometer based on mobile phone and method thereof |
| CN107272482A (en) * | 2017-06-02 | 2017-10-20 | 杭州亿恒科技有限公司 | Power capacitor noise control method based on Vibration Active Control |
| CN107272482B (en) * | 2017-06-02 | 2019-08-13 | 杭州亿恒科技有限公司 | The noise control method of power capacitor based on Vibration Active Control |
| CN112729528A (en) * | 2020-12-07 | 2021-04-30 | 潍柴动力股份有限公司 | Noise source identification method, device and equipment |
| CN112729528B (en) * | 2020-12-07 | 2022-09-23 | 潍柴动力股份有限公司 | Noise source identification method, device and equipment |
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Owner name: CSG ELECTRIC POWER RESEARCH INSTITUTE CO., LTD. Free format text: FORMER OWNER: SOUTHERN POWER GRID TECHNOLOGY RESEARCH CENTER Effective date: 20111114 |
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Effective date of registration: 20111114 Address after: Guangzhou City, Guangdong province Yuexiu District 510080 Dongfeng East Road, No. 8 building water Kong Guangdong West 1904 Applicant after: China South Power Grid International Co.,Ltd. Co-applicant after: Hefei University of Technology Address before: 510623 Guangdong city of Guangzhou province Tianhe District Pearl River Metro Chinese Sui Road No. 6 Applicant before: Southern Power Grid Technology Research Center Co-applicant before: Hefei University of Technology |
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Application publication date: 20100804 |