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Power transformer radiation audible noise calculating method

A technology of power transformer and calculation method, which is applied in the direction of noise coefficient or signal-to-noise ratio measurement, etc., can solve the problems of difficulty in noise prediction and calculation in substations, and achieve the effect of simple and easy calculation method.

Active Publication Date: 2013-06-26
STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST +1
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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for calculating the audible noise radiated by power transformers, which can conveniently calculate the audible noise A sound level around the power transformer, and solve the difficulty in predicting and calculating substation noise in current power transmission and transformation projects. to provide a reference for the design, construction and operation of power transmission and transformation substation projects

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  • Power transformer radiation audible noise calculating method

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Embodiment Construction

[0031] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0032] An embodiment of a method for calculating audible noise radiated by a power transformer according to the present invention: a method for calculating audible noise radiated by a power transformer comprises the following steps:

[0033] Calculate the characteristic parameters of the transformer's sound emitting area and external dimensions;

[0034] Obtaining the quasi-emitting surface r of the transformer 0 m noise value Lp(r 0 ), transformer noise average sound pressure level L Pa Harmony sound power level Lw, calculate transformer noise distribution unbalance correction amount K;

[003...

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Abstract

The invention relates to the field of power, in particular to a power transformer radiation audible noise calculating method. The method includes following steps: calculating sounding area and dimension characteristic parameters of a transformer; obtaining a r0 meter noise value Lp(r0) of a quasi emitting surface of the transformer, an average sound pressure level LPa and a sound power level Lw of noise of the transformer, and calculating noise distribution imbalance correction K of the transformer; and calculating to obtain an audible noise A sound level distant from the position r of the transformer. The power transformer radiation audible noise calculating method is simple and easy to implement, and characteristics such as the sounding area, dimension features and nonuniform noise distribution of the transformer are taken into full consideration, so that compared with calculating results obtained by other formulas, power transformer radiation noise values obtained by the method are more consistent with measuring results of transformers in 110-500kV transformer stations in China. The power transformer radiation audible noise calculating method is especially suitable for radiation audible noise calculation of large power transformers in power transmission and transformation projects, and also suitable for radiation audible noise calculation of noise sources capable of being stimulated to be cuboids.

Description

technical field [0001] The invention relates to the field of electric power, in particular to a calculation method for audible noise radiated by a power transformer. Background technique [0002] In order to meet the sustainable development of the economy and society, the construction of a strong power grid with high voltage and ultra high voltage as the core has become a strategic goal of electric power construction. On the other hand, with the rapid development of power grid construction and society, the requirements of the government and the public for environmental protection are also Environmental disputes are increasing year by year, and the noise problem of power transmission and transformation substations has become particularly prominent. Disputes and complaints caused by noise during substation operation have even become factors restricting the development of power grid construction in some areas. [0003] Substations of power transmission and transformation proje...

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Application Information

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IPC IPC(8): G01R29/26
Inventor 陈巍林巧红刘涛王方强叶春燕
Owner STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST
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