Transformer station noise coupling separation method

A noise separation and substation technology, applied in the field of signal processing, can solve problems such as wide spectrum range and short duration, and achieve the effect of improving the ability to identify corona noise

Active Publication Date: 2017-08-11
SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
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Problems solved by technology

At the same time, as the voltage level increases, the corona noise caused by air ionization discharge cannot be ignored. This kind of noise gener...

Method used

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  • Transformer station noise coupling separation method
  • Transformer station noise coupling separation method
  • Transformer station noise coupling separation method

Examples

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Embodiment

[0046] Such as figure 1 As shown, a method for matching and separating substation noise, the method sequentially separates transformer noise, corona noise and other noises. The separation includes four steps:

[0047] Step 1. Spectrum analysis;

[0048] Step 2: Noise separation of the transformer itself;

[0049] Step 3: Separate corona noise;

[0050] Step 4. Separate other noises.

[0051] Substation noise mainly includes transformer noise, corona noise and other noises. Among them, the transformer body noise is concentrated in 50Hz and harmonic components with 50Hz as the fundamental frequency; corona noise is short-term impulse noise, the main frequency band is audible sound range 20Hz~20KHz; other noises appear as white noise, including fan noise and background Noise etc.

[0052] The process of step one is:

[0053] Perform FFT transformation on the original signal to obtain noise spectrum characteristics;

[0054] According to the characteristics of the noise spectrum, the resona...

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Abstract

The invention relates to a transformer station noise coupling separation method. The transformer station noise coupling separation method includes the following steps: S1, performing spectrum analysis on the original signal of noise, sorting 50Hz of resonant frequency and the resonant frequency taking 50Hz as the fundamental frequency according to energy from high to low, obtaining a plurality of resonant frequencies which are taken as the noise frequency of the main body of a transformer; S2, taking the original signal as an initial residual error signal, separating the noise of the main body of the transformer from the original signal successively, and obtaining a residual error signal; S3, separating the corona noise from the residual error signal obtained from the step S2; and S4, taking the residual noise as other noises, including the blower fan noise and the background noise. Compared with the prior art, the transformer station noise coupling separation method constructs a coupling function according to the intrinsic characteristics of the noises generated from different noise sources of the transformer station, and organically considers the original noise source characteristics, thus having high practicality, and being able to effectively separate the main body noise of the transformer, the corona noise and other random noises. The transformer station noise coupling separation method can provide means and methods for transformer station noise environmental impact assessment, noise treatment and part evaluation.

Description

Technical field [0001] The invention relates to a signal processing method, in particular to a method for matching and separating substation noise. Background technique [0002] Compared with conventional power transmission, ultra-high voltage and long-distance power transmission have the advantages of large transmission capacity, long transmission distance, low line loss, and less land occupation. In September 2013, the world's first 1000 kV double-circuit UHV AC project on the same tower-Anhui-East Power Transmission was officially put into operation, which marked that my country's UHV transmission technology is at the leading level in the world, and is in my country and other regions in the world. It also has broad application prospects. With the increase of voltage levels, the problem of noise interference has become increasingly prominent, and reducing the impact of noise on the surrounding environment is one of the important goals of building a green and environmentally fri...

Claims

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Application Information

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IPC IPC(8): G01H17/00G06K9/00
CPCG01H17/00G06F2218/06
Inventor 戴峥汪胡根乔飞李峰
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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