CN102435874A - Method for measuring high-voltage power transmission equipment noise - Google Patents
Method for measuring high-voltage power transmission equipment noise Download PDFInfo
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- CN102435874A CN102435874A CN2011102664075A CN201110266407A CN102435874A CN 102435874 A CN102435874 A CN 102435874A CN 2011102664075 A CN2011102664075 A CN 2011102664075A CN 201110266407 A CN201110266407 A CN 201110266407A CN 102435874 A CN102435874 A CN 102435874A
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Abstract
The invention relates to a method for measuring high-voltage power transmission and transformation equipment noise. The method comprises the following steps of: firstly, stipulating a contour line of measurement, and arranging a probe; secondly, utilizing a current inductive device to induct rated current onto power transmission equipment, and obtaining noise under the rated current; thirdly, applying rated voltage to obtain noise under the rated voltage; and finally, calculating noise level of the power transmission equipment under a normal working condition according to a formula. The comparison of test data obtained by test proves that the method provided by the invention has higher accuracy, and can be applied to pre-measurement of the high-voltage power transmission and transformation equipment noise in the future.
Description
Technical field
The invention belongs to high voltage power transmission and transforming engineering electromagnetic compatibility field, is a kind of measuring method of high voltage power transmission noise of equipment specifically.
Background technology
Along with the fast development of power grid construction cause, the government and the masses are also increasingly high to the environmental protection requirement, make that the noise problem in the project of transmitting and converting electricity becomes comparatively outstanding, have caused the great attention of all circles.There is bigger low frequency component in the noise of high-tension power transmission and transformation equipment; Mainly be because power frequency alternating voltage and electric current and harmonic wave thereof; Be easy to generate comparatively significant corona discharge and iron core vibrations at positive negative peak place, and form the pure sound of 100Hz and multiple frequency similar " humming " thereof.Consider that high-tension power transmission and transformation equipment when doing the test of dispatching from the factory, only does rated voltage test, the just idle operator lamp level that therefore obtains usually; And equipment is installed to after the scene; Owing to receive the noise of contiguous high-tension apparatus; Therefore can not make effective measurement to the concrete noise of a certain power transmission and transforming equipment, seek a kind ofly more to be necessary very much near the measuring method of the noise of the high voltage power transmission equipment of actual conditions.
Summary of the invention
The measuring method that the purpose of this invention is to provide a kind of high voltage power transmission noise of equipment is to overcome the deficiency of prior art.
To achieve these goals, the method that the present invention adopted is:
A kind of measuring method of high voltage power transmission noise of equipment; With confirm that with unloaded sound pressure level method is similar, the outline line of specifying measurement is at first arranged probe then; Use current sensing means then instead; Sense rated current on the transmission facility noise that utilizes rated current to obtain, noise level under the counter again normal operation of releasing transmission facility.
Its concrete steps are:
First step: according to the self-characteristic of equipment, the outline line of specifying measurement;
Second step: the sonic transducer probe is set;
Third step:,, measure the noise level under the rated current to transmission facility coupling rated operational current through current sensing means;
The 4th step: load specified no-load voltage to power transformating and supplying facility, measure the noise level under the specified no-load voltage;
The 5th step:, extrapolate noise level under the real work situation of transmission facility according to the noise of no-load voltage and rated current.
Through the test figure contrast proof that test is obtained, the present invention has high accuracy, can be applicable to the prediction of high-tension power transmission and transformation equipment noise from now on and measures.
Description of drawings
Fig. 1 is a defined outline line synoptic diagram of the present invention.
Fig. 2 responds to the synoptic diagram of rated current for the present invention.
Embodiment
Below in conjunction with embodiment the present invention is done further detailed explanation, but this embodiment should not be construed as limitation of the present invention.
Because the noises of hearing that transmission facility sent such as transformer are to be caused by the magnetic hysteresis dilatation of iron core and the electromagnetic force in winding, fuel tank and the magnetic shielding.Magnetic field is to bring out core-lamination stack longitudinally to vibrate the principal ingredient that the noise that is produced is a transformer noise.Electric current produces electromagnetic force through meeting in winding in winding.In addition, stray field also can make structural member produce vibration.Square being directly proportional of electromagnetic force (and vibration amplitude) and electric current, and square being directly proportional of the acoustical power of emission and vibration amplitude.Therefore, the acoustical power of emission and load current have relation clearly.Vibration in the device body (assembly of iron core and winding) can make fuel tank, magnetic shielding and wireway (if having) produce resonance again.
For dry type hollow shunt reactor or dry-type hollow series reactor, act on the winding the noise that electromagnetic force produced with above said similar.These vibration forces make reactor axially upwards produce vibration with the width of cloth, and axially with the width of cloth to the vibration that possibly cause other patterns except that rotating symmetric vibration again of support member and the deviation in the manufacturing.For iron-core reactor, the power that acts in the iron core also can cause further vibration.
Therefore in order to obtain the noise level of transmission facility such as transformer, must consider rated current state noise level down, pass through mathematical method then, the counter operate as normal noise level of releasing transmission facility such as normal transformer.
Concrete steps are following:
(1) defined outline line
When under air cooling equipment (if having) condition out of service, carrying out sound level measurement, the outline line of regulation should be apart from benchmark surface of emission 0.3m, but to the dry-type transformer of unprotect shell; Reason owing to safety; This distance should be elected 1m as, and when under air cooling equipment throwing people service condition, carrying out sound level measurement, the outline line of regulation should be apart from benchmark surface of emission 2m; For the transformer of fuel tank height less than 2.5m, the defined outline line should be positioned on the surface level at fuel tank height 1/2 place.For the fuel tank height is 2.5m and above transformer, and two outline lines should be arranged, lay respectively on the surface level at fuel tank height 1/3 place and 2/3 place, but if because safety, then selection is positioned at the outline line of fuel tank height lower part.
When under the cooling device condition of work is only arranged, carrying out sound level measurement, less than 4m, then the defined outline line should be positioned on the surface level at cooling device overall height 1/2 place as if cooling device overall height (not comprising oil conservater, pipeline etc.).If cooling device overall height (not comprising oil conservater, pipeline etc.) is for more than 4m reaches; Two outline lines should be arranged; Lay respectively on the surface level at cooling device overall height 1/3 place and 2/3 place, but if because safety, then selection is positioned at the outline line of cooling device overall height lower part.
(2) arrange microphone position
Microphone should be positioned on the defined outline line, to each other apart from about equally, and at interval must not be greater than the 1m (see figure 1).At least should be provided with 6 microphone positions.
Can use the memory-type measuring equipment that has the device of averaging.Microphone should be similar to moving of even speed doing on the defined outline line of test product, and the quantity of reading sampling should be no less than the measuring point number of top defined.Only need list the data of average energy in the test report.
(3) the induction rated current is measured noise.
As shown in Figure 2, equipment such as transformer to be measured are as the secondary winding of punching transformer and form the closed-loop path.Through the former limit winding input electromotive force of adjustment punching transformer, change the induction output potential of punching transformer, promptly the induced potential in test specimen loop is realized adjustment test specimen loop induction current technology.Pilot system is made up of pressure regulator, punching transformer, pressure regulator switch board, reactive-load compensation unit, Computerized monitor system, current transformer, power cable and signal cable etc.
Through the induction rated current, according to step 1 and step 2, measure noise level, the A weighted sound power level L of record transformer under sinusoidal wave rated current
IN
(4) load rated voltage, measure noise
To device loads rated voltages such as transformer to be measured, repeating step one and step 2 are measured noise level, the A weighted sound power level L of record transformer under sinusoidal wave rated voltage
UN
(5) the actual noise level under the normal operation of reckoning transmission facility
For the transformer that under rated voltage and rated current, moves, its A weighted sound power level can be calculated as follows by unloaded sound power level of A weighted and A weighted rated current sound power level:
In the formula:
L
SNThe A weighted sound power level (load sound level) of-transformer under sinusoidal wave rated voltage, sinusoidal wave rated current and rated frequency, unit is dB (A):
L
UNThe A weighted sound power level (unloaded sound level) of-transformer under sinusoidal wave rated voltage, rated frequency and no-load current, unit is dB (A):
L
INThe A weighted sound power level (load current sound level) of-transformer under rated current, unit is dB (A).
The content of not doing in this instructions to describe in detail belongs to this area professional and technical personnel's known prior art.
Claims (4)
1. the measuring method of a high-tension power transmission and transformation equipment noise, its method is: the outline line of specifying measurement at first, arrange probe; Utilize current sensing means then, sense rated current on the transmission facility, obtain the noise under the rated current; Apply rated voltage again, obtain the noise under the rated voltage; At last go out noise level under the normal operation of transmission facility according to formula to calculating.
2. the measuring method of high-tension power transmission and transformation equipment noise as claimed in claim 1, its concrete steps are:
First step: defined outline line;
Second step: arrange microphone position;
Third step: the A weighted sound power level L of measuring transformer under sinusoidal wave rated current
IN
The 4th step: apply rated voltage, the A weighted sound power level L of measuring transformer under sinusoidal wave rated voltage
UN
The 5th step: calculate the actual noise level,
For the transformer that under rated voltage and rated current, moves, its A weighted sound power level is calculated as follows by unloaded sound power level of A weighted and A weighted rated current sound power level:
In the formula:
L
SNThe A weighted sound power level of-transformer under sinusoidal wave rated voltage, sinusoidal wave rated current and rated frequency, unit is dB (A);
L
UNThe A weighted sound power level (unloaded sound level) of-transformer under sinusoidal wave rated voltage, rated frequency and no-load current, unit is dB (A);
L
INThe A weighted sound power level (load current sound level) of-transformer under rated current, unit is dB (A).
3. the measuring method of high-tension power transmission and transformation equipment noise as claimed in claim 2 is characterized in that: in the first step according to the different defined outline lines of power transmission and transforming equipment type.
4. the measuring method of high-tension power transmission and transformation equipment noise as claimed in claim 2 is characterized in that: the mode through couple current in the third step is responded to upward rated current to power transmission and transforming equipment.
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| CN2011102664075A CN102435874A (en) | 2011-09-09 | 2011-09-09 | Method for measuring high-voltage power transmission equipment noise |
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| CN2011102664075A CN102435874A (en) | 2011-09-09 | 2011-09-09 | Method for measuring high-voltage power transmission equipment noise |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103033259A (en) * | 2012-12-25 | 2013-04-10 | 中国电力科学研究院 | Converting station primary device acoustic power level measuring structure and method |
| CN103076514A (en) * | 2012-12-24 | 2013-05-01 | 保定天威保变电气股份有限公司 | Sound level measuring test method for dry-type smoothing reactor |
| CN104062000A (en) * | 2014-06-25 | 2014-09-24 | 国家电网公司 | Large power facility sound power level field measurement method and device thereof |
| CN104156554A (en) * | 2014-05-23 | 2014-11-19 | 国家电网公司 | Method for recording and evaluating noise of transformer |
| CN104951635A (en) * | 2014-03-24 | 2015-09-30 | 国家电网公司 | Transformer noise estimating method for determining full load noise |
| CN108090287A (en) * | 2017-12-20 | 2018-05-29 | 中国电力科学研究院有限公司 | It is a kind of to pass through the anti-method and system for pushing away single-phase transmission line acoustical power of the pure sound of transmission line of electricity 100Hz |
| CN114216635A (en) * | 2021-11-24 | 2022-03-22 | 广西电网有限责任公司电力科学研究院 | Device and method for testing influence of tension screw rod of shunt reactor on vibration and noise |
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| CN101122518A (en) * | 2007-09-14 | 2008-02-13 | 北京中星微电子有限公司 | Method and device for noise test through portable equipment |
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Patent Citations (4)
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| JPH11122918A (en) * | 1997-10-13 | 1999-04-30 | Izumi Denki Kk | High-voltage power supply |
| CN101122518A (en) * | 2007-09-14 | 2008-02-13 | 北京中星微电子有限公司 | Method and device for noise test through portable equipment |
| US8145181B2 (en) * | 2008-10-21 | 2012-03-27 | Ming-Wei Lu | Electric power transmission system for communications with noise elimination arrangement |
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Non-Patent Citations (1)
| Title |
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| 季青: "变压器噪声分析及改善措施", 《农业装备技术》, vol. 36, no. 3, 30 June 2010 (2010-06-30), pages 46 - 48 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103076514A (en) * | 2012-12-24 | 2013-05-01 | 保定天威保变电气股份有限公司 | Sound level measuring test method for dry-type smoothing reactor |
| CN103033259A (en) * | 2012-12-25 | 2013-04-10 | 中国电力科学研究院 | Converting station primary device acoustic power level measuring structure and method |
| CN104951635A (en) * | 2014-03-24 | 2015-09-30 | 国家电网公司 | Transformer noise estimating method for determining full load noise |
| CN104951635B (en) * | 2014-03-24 | 2018-05-29 | 国家电网公司 | A kind of transformer noise predictor method for determining noise at full capacity |
| CN104156554A (en) * | 2014-05-23 | 2014-11-19 | 国家电网公司 | Method for recording and evaluating noise of transformer |
| CN104062000A (en) * | 2014-06-25 | 2014-09-24 | 国家电网公司 | Large power facility sound power level field measurement method and device thereof |
| CN108090287A (en) * | 2017-12-20 | 2018-05-29 | 中国电力科学研究院有限公司 | It is a kind of to pass through the anti-method and system for pushing away single-phase transmission line acoustical power of the pure sound of transmission line of electricity 100Hz |
| CN108090287B (en) * | 2017-12-20 | 2022-04-15 | 中国电力科学研究院有限公司 | Method and system for reversely deducing single-phase wire sound power through 100Hz pure sound of power transmission line |
| CN114216635A (en) * | 2021-11-24 | 2022-03-22 | 广西电网有限责任公司电力科学研究院 | Device and method for testing influence of tension screw rod of shunt reactor on vibration and noise |
| CN114216635B (en) * | 2021-11-24 | 2023-08-22 | 广西电网有限责任公司电力科学研究院 | Test device and method for influencing vibration and noise by tensioning screw rod of parallel reactor |
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Application publication date: 20120502 |