CN104156554A - Method for recording and evaluating noise of transformer - Google Patents
Method for recording and evaluating noise of transformer Download PDFInfo
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- CN104156554A CN104156554A CN201410223502.0A CN201410223502A CN104156554A CN 104156554 A CN104156554 A CN 104156554A CN 201410223502 A CN201410223502 A CN 201410223502A CN 104156554 A CN104156554 A CN 104156554A
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Abstract
The invention relates to a method for recording and evaluating the noise of a transformer. The method for recording and evaluating the noise of the transformer is based on the rate of started cooling fans and comprises the steps that (1) with the due north direction as 0 degree, eight to twelve measurement points are evenly selected on the measured surface of the transformer clockwise, and the measurement points are numbered; (2) A sound pressure level testing is conducted on each measurement point, and the average sound pressure level and A weighting sound power level are calculated; (3) the parameters of the voltage and the current of the high-voltage side of the transformer are collected, and the A weighting sound power level, at the rated current, of the transformer is calculated; (4) the number of all fans of the transformer and the number of fans in operation are collected; (5) recording and evaluating are conducted according to the rate of started fans, wherein the rate of started fans can be equal to or below one fourth, ranges from one fourth to half, ranges from half to three fourths and above three fourths. According to the method for recording and evaluating the noise of the transformer, the influence of the rate of started fans on the noise of the transformer is fully considered during noise recording and evaluating, objective and fair recording and evaluating of the noise of the transformer are achieved, the specificity and the traceability of the measurement points are guaranteed, erroneous judgments and disputes are reduced, and social harmony is promoted.
Description
Technical field
The invention belongs to noise measuring and control technology field, relate to record and the evaluation of transformer noise, be specifically related to a kind of transformer noise record and evaluation method of opening ratio based on fan for cooling transformer.
Background technology
Transformer noise easily causes that resident dislikes, and affects quality of life, especially affects the quality of resident's sleep.Current transformer noise measure evaluation method disunity, lack of standardization, cannot review.Testing agency only records the A sound pressure level of transformer while measuring noise, do not record other parameter or other reference record disunity, measuring point is indefinite, only a numerical value is at that time tested in representative, measurement result cannot be evaluated and trace to the source, can not fit like a glove with periphery resident's long-term exposure, can not represent the real noise level of transformer itself.In transformer noise, cooling fan is opened quantity and is played material impact, only surveys integrated noise in general test, does not distinguish, and therefore can not correctly reflect the actual conditions in transformer noise source.For ease of controlling and the pollution of improvement transformer noise, need the noise of correct record and evaluation transformer.
Publication number is that open " a kind of worker of transformer station operation place noise analysis approach and system, comprise the following steps the Chinese invention patent application of CN103425887A: 1) collect basic data; 2) build physical model; 3) setting noise figure calculates; 4) exposure limit judgement; 5) setting occupational health is evaluated.The method can accurately be considered the geometric divergence of noise transmission, the impact on noise attentuation such as atmosphere, ground, buildings, greenbelt in route of transmission ".But this patented claim is not considered cooling fan and is opened the impact on transformer noise.
Summary of the invention
The record and the evaluation method that the object of this invention is to provide a kind of transformer noise, take into full account cooling fan and open the impact of ratio on transformer noise, make the record of transformer noise and evaluate objective and fair, there is the property of recourse, reduce dispute, promote social harmony.
The technical scheme of transformer noise record of the present invention and evaluation method is that, based on fan for cooling transformer unlatching ratio, step is as follows:
(1) at transformer, measure surface and select measuring point numbering, take direct north as 0 °, clockwise direction is evenly chosen the measuring point of 8～12 angles, to the measuring point numbering of choosing, as uniqueness mark;
(2) each measuring point is carried out to the test of A sound pressure level, calculate average sound pressure level, then carry out A weighted sound power level L
wAcalculate;
1. being calculated as of average sound pressure level:
L
PA=10lg（1/N（Σ10
0.1LAi））
In formula:
L
pA-average A sound pressure level, the dB(A of unit);
The measuring point number of N-choose;
LAi-each measuring point A sound pressure level, the dB(A of unit);
2. A weighted sound power level is calculated as:
L
WA=L
PA+10lg（S/S
0）；
In formula:
S-measurement surface area, (m
2);
S
0---reference area, (1m
2);
L
wA-A weighted sound power level, the dB(A of unit);
L
pA-average sound pressure level, the dB(A of unit);
(3) the voltage, the current parameters that gather high voltage side of transformer, electric current comprises actual current and rated current, the A weighted sound power level of calculating transformer under rated current, computing formula is:
L
WA,
IN=?L
WA+40lg（I
N/I
T）
In formula:
L
wA,
iNthe A weighted sound power level of-transformer under rated current, dB(A);
I
n-rated current, A;
I
t-actual current, A;
(4) the number of fans that gathers transformer fan sum and moving;
(5) according to fan, open ratio below 1/4,1/4～1/2 respectively, more than 1/2～3/4 and 3/4 record respectively and evaluate, record entry comprises that rated current, actual current, fan open A weighted sound power level under A sound-pressure-level measurement value, average A sound pressure level and the rated current of ratio, each measuring point; Assessment item is A weighted sound power level under nominal current conditions.
The method of A weighted acoustical power evaluation is: 1. dry type amorphous alloy substation transformer unshakable in one's determination is evaluated according to the limit value requiring in GB/T 22072-2008; 2. oil immersed amorphous alloy iron core distribution transformer is evaluated according to the limit value requiring in GB/T 25446-2010; 3. 6kV ~ 500kV level power transformer is according to the limit value evaluation that requires in JB/T10088-2004.
The record of transformer noise of the present invention and evaluation have taken into full account cooling fan and have opened the impact of ratio on transformer noise, make the record of transformer noise and evaluate objective and fair, reduce erroneous judgement and dispute, promote social harmony.By orientation angles, at transformer, measure surface and select measuring point and numbering, guaranteed definition and the trackability of measuring point.Gather the current parameters of high voltage side of transformer, transformer is calculated to sound power level with the method for boosting, calculate the sound power level under its nominal current conditions, result of calculation has represented the noise level of transformer itself, possesses good traceability, record transformer fan sum and operation number simultaneously, according to operation number/sum, carry out record, realized the noise contrast of different fan sum transformers and evaluated.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of transformer noise record of the present invention and evaluation.
Embodiment
The present invention is described in detail by reference to the accompanying drawings.
The record of transformer noise of the present invention and evaluation method, open ratio based on fan for cooling transformer, and step is:
(1) at transformer, measure surface and carry out measuring point numbering: take direct north as 0 °, it is measuring point that clockwise direction is evenly chosen 12 angles, 0 °, 30 °, 60 °, 90 °, 120 °, 150 °, 180 °, 210 °, 240 °, 270 °, 300 ° and 330 °, above-mentioned measuring point is numbered, as uniqueness mark;
(2) each measuring point is carried out to the test of A sound pressure level, calculate average sound pressure level, then carry out A weighted sound power level L
wAcalculate;
1. the calculating of meter area:
S=（h+2）×lm
2-measuring distance, m;
H-oil tank of transformer height or report cooling device are at interior cooling device height, m;
The girth of lm-defined outline line, m;
2. the A sound pressure level of 12 measuring points is obtained in test, and calculates average A sound pressure level according to following formula:
L
PA=10lg（1/N（Σ10
0.1LAi））
3. A sound power level is calculated:
L
WA，IT=L
PA+10lg（S/S
0）
S
0-reference area (1m
2)
(3) gather high voltage side of transformer voltage, current parameters, electric current comprises actual current and rated current, the A weighted sound power level of calculating transformer under rated current, and computing formula is:
L
WA，IN=?L
WA，IT+40lg（I
N/I
T）
In formula:
L
wA,
iNthe A weighted sound power level of-transformer under rated current, (dB(A));
I
n-rated current, A;
I
t-actual current, A;
(4) the number of fans that gathers transformer fan sum and moving;
(5) according to fan, open ratio below 1/4,1/4～1/2 respectively, more than 1/2～3/4 and 3/4 record respectively and evaluate, record entry comprises A weighted sound power level under rated current, actual current, fan unlatching ratio, the A sound-pressure-level measurement value of each measuring point, equal A sound pressure level and rated current.Assessment item is A weighted sound power level under nominal current conditions, evaluates and evaluates according to the limit value requiring in (JB/T10088-2004) 6kV ~ 500kV level power transformer A weighted sound power level.The record of transformer noise and evaluation result are in Table 1.
Claims (2)
1. the record of transformer noise and an evaluation method, open ratio based on fan for cooling transformer, and step is as follows:
(1) at transformer, measure surface and select measuring point numbering, take direct north as 0 °, clockwise direction is evenly chosen the measuring point of 8～12 angles, to the measuring point numbering of choosing;
(2) each measuring point is carried out to the test of A sound pressure level, calculate average sound pressure level, then carry out A weighted sound power level L
wAcalculate;
1. being calculated as of average sound pressure level:
L
PA=10lg（1/N（Σ10
0.1LAi））
In formula:
L
pA -average A sound pressure level, the dB(A of unit);
The measuring point number of N-choose;
LAi-each measuring point A sound pressure level, the dB(A of unit);
2. A weighted sound power level is calculated as:
L
WA=L
PA0+10lg（S/S
0）；
In formula:
S-measurement surface area, m
2;
S
0---reference area, 1m
2;
L
wA-A weighted sound power level, dB(A);
L
pA0-average A sound pressure level, the dB(A of unit);
(3) the voltage, the current parameters that gather high voltage side of transformer, electric current comprises actual current and rated current, the A weighted sound power level of calculating transformer under rated current, computing formula is:
L
WA,
IN=?L
WA+40lg（I
N/I
T）
In formula:
L
wA,
iNthe A weighted sound power level of-transformer under rated current, the dB(A of unit);
I
n-rated current, A;
I
t-actual current, A;
(4) the number of fans that gathers transformer fan sum and moving;
(5) according to fan, open ratio below 1/4, more than 1/4～1/2,1/2～3/4 and 3/4 record respectively and evaluate respectively; Record entry comprises A weighted sound power level under rated current, actual current, fan unlatching ratio, the A sound-pressure-level measurement value of each measuring point, equal A sound pressure level and rated current; Assessment item is A weighted sound power level under nominal current conditions.
2. the record of transformer noise according to claim 1 and evaluation method, is characterized by: the method for described A weighted acoustical power evaluation is: 1. dry type amorphous alloy substation transformer unshakable in one's determination is evaluated according to the limit value requiring in GB/T 22072-2008; 2. oil immersed amorphous alloy iron core distribution transformer is evaluated according to the limit value requiring in GB/T 25446-2010; 3. 6kV ~ 500kV level power transformer is according to the limit value evaluation that requires in JB/T10088-2004.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410223502.0A CN104156554A (en) | 2014-05-23 | 2014-05-23 | Method for recording and evaluating noise of transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410223502.0A CN104156554A (en) | 2014-05-23 | 2014-05-23 | Method for recording and evaluating noise of transformer |
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| Publication Number | Publication Date |
|---|---|
| CN104156554A true CN104156554A (en) | 2014-11-19 |
Family
ID=51882052
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|---|---|---|---|
| CN201410223502.0A Pending CN104156554A (en) | 2014-05-23 | 2014-05-23 | Method for recording and evaluating noise of transformer |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106096184A (en) * | 2016-06-24 | 2016-11-09 | 中国电力科学研究院 | A kind of noise calculation method and system of transformator multiple spot Source Model based on sound intensity technique |
| CN106286362A (en) * | 2016-07-22 | 2017-01-04 | 国家电网公司 | Fan for cooling transformer evaluation of running status method and system based on noise |
| CN107422205A (en) * | 2017-07-20 | 2017-12-01 | 上海思源电力电容器有限公司 | A kind of power capacitor noise equal proportion current test method |
| CN108362966A (en) * | 2018-02-12 | 2018-08-03 | 广东电网有限责任公司电力科学研究院 | A kind of oil-immersed type transformer high-precision noise on-line monitoring method and system |
| CN110895166A (en) * | 2018-11-22 | 2020-03-20 | 研祥智能科技股份有限公司 | Automatic noise testing method |
| CN112595511A (en) * | 2020-11-24 | 2021-04-02 | 潍柴动力股份有限公司 | Gear noise detection device |
| CN112816802A (en) * | 2020-12-22 | 2021-05-18 | 国家电网有限公司 | Transformer basic noise level assessment method |
| CN113252165A (en) * | 2021-03-31 | 2021-08-13 | 国网河北省电力有限公司电力科学研究院 | Transformer substation noise monitoring method |
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| JP2008082778A (en) * | 2006-09-26 | 2008-04-10 | Jfe Steel Kk | Method and apparatus for measuring natural frequency of iron core of transformer |
| CN102435874A (en) * | 2011-09-09 | 2012-05-02 | 国网电力科学研究院 | Method for measuring high-voltage power transmission equipment noise |
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2014
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106096184A (en) * | 2016-06-24 | 2016-11-09 | 中国电力科学研究院 | A kind of noise calculation method and system of transformator multiple spot Source Model based on sound intensity technique |
| CN106096184B (en) * | 2016-06-24 | 2020-10-09 | 中国电力科学研究院 | Noise calculation method and system of transformer multipoint sound source model based on sound intensity method |
| CN106286362A (en) * | 2016-07-22 | 2017-01-04 | 国家电网公司 | Fan for cooling transformer evaluation of running status method and system based on noise |
| CN106286362B (en) * | 2016-07-22 | 2017-10-24 | 国家电网公司 | Fan for cooling transformer evaluation of running status method and system based on noise |
| CN107422205A (en) * | 2017-07-20 | 2017-12-01 | 上海思源电力电容器有限公司 | A kind of power capacitor noise equal proportion current test method |
| CN108362966A (en) * | 2018-02-12 | 2018-08-03 | 广东电网有限责任公司电力科学研究院 | A kind of oil-immersed type transformer high-precision noise on-line monitoring method and system |
| CN110895166A (en) * | 2018-11-22 | 2020-03-20 | 研祥智能科技股份有限公司 | Automatic noise testing method |
| CN112595511A (en) * | 2020-11-24 | 2021-04-02 | 潍柴动力股份有限公司 | Gear noise detection device |
| CN112816802A (en) * | 2020-12-22 | 2021-05-18 | 国家电网有限公司 | Transformer basic noise level assessment method |
| CN112816802B (en) * | 2020-12-22 | 2022-06-07 | 国家电网有限公司 | Transformer basic noise level assessment method |
| CN113252165A (en) * | 2021-03-31 | 2021-08-13 | 国网河北省电力有限公司电力科学研究院 | Transformer substation noise monitoring method |
| CN113252165B (en) * | 2021-03-31 | 2022-06-14 | 国网河北省电力有限公司电力科学研究院 | Transformer substation noise monitoring method |
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Application publication date: 20141119 |