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Method for recording and evaluating noise of transformer

An evaluation method, transformer technology, applied in the direction of instruments, special data processing applications, electrical digital data processing, etc., can solve the problem of not considering the influence of cooling fans, to ensure clarity and traceability, reduce misjudgment and disputes, Documenting and evaluating objective and impartial effects

Inactive Publication Date: 2014-11-19
STATE GRID CORP OF CHINA +2
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the patent application does not consider the impact of the cooling fan on the transformer noise

Method used

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  • Method for recording and evaluating noise of transformer
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Embodiment Construction

[0032] The present invention is described in detail in conjunction with the accompanying drawings.

[0033] The method for recording and evaluating transformer noise of the present invention is based on the opening ratio of the transformer cooling fan, and the steps are:

[0034] ⑴Measuring points on the measuring surface of the transformer and numbering: take the true north direction as 0°, and uniformly select 12 angles as measuring points in the clockwise direction, namely 0°, 30°, 60°, 90°, 120°, 150°, 180°, 210°, 240°, 270°, 300° and 330°, number the above measuring points as unique marks;

[0035] ⑵ Carry out A sound pressure level test for each measuring point, calculate the average sound pressure level, and then carry out A-weighted sound power level L WA calculate;

[0036] ① Calculation of the measured surface area:

[0037] S=(h+2)×lm

[0038] 2—measurement distance, m;

[0039] h—height of transformer oil tank or cooling equipment includin...

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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 [0001] The invention belongs to the technical field of noise detection and control, and relates to the recording and evaluation of transformer noise, in particular to a transformer noise recording and evaluation method based on the opening ratio of a transformer cooling fan. Background technique [0002] Transformer noise is likely to arouse residents' resentment and affect the quality of life, especially the quality of sleep of residents. The current transformer noise measurement and evaluation methods are not uniform, not standardized, and cannot be traced back. When the testing agency measures the noise, it only records the A sound pressure level of the transformer, and does not record other parameters or the records of other parameters are inconsistent, the measurement point is not clear, and it only represents a value at the time of the test. The long-term experience cannot be completely matched, and cannot represent the real noise level of the transfor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 张志强李振海宋国升牛向楠
Owner STATE GRID CORP OF CHINA
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