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Transformer direct-current magnetic bias evaluation method

A DC bias, transformer technology, applied in the field of transformers, can solve the problems of randomness, accuracy reduction, transformer ambiguity, etc.

Active Publication Date: 2019-12-27
SHENZHEN POWER SUPPLY BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a transformer DC bias evaluation method for the evaluation of the DC bias phenomenon of the transformer.

Method used

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  • Transformer direct-current magnetic bias evaluation method
  • Transformer direct-current magnetic bias evaluation method
  • Transformer direct-current magnetic bias evaluation method

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Embodiment Construction

[0062] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and understandable, the specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific implementation disclosed below.

[0063] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" an...

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Abstract

The invention provides a transformer direct-current magnetic bias evaluation method, which comprises the following steps: firstly, obtaining an actual exciting current characteristic quantity of a transformer, and determining a relative degradation value of the actual exciting current characteristic quantity based on the actual exciting current characteristic quantity; and determining a whiteningweight of the actual exciting current characteristic quantity in a preset gray state based on the relative degradation value; secondly, determining a variable weight coefficient of the actual excitingcurrent characteristic quantity based on the relative degradation value, and determining a final weight vector of the actual exciting current characteristic quantity according to the variable weightcoefficient; and finally, determining the sum of clustering coefficients of the actual exciting current characteristic quantity in the preset gray state based on the whitening weight and the final weight vector, determining the maximum value of the sum of the clustering coefficients, and determining the evaluation result of the transformer based on the gray state where the maximum value of the sumof the clustering coefficients is located. By adopting the evaluation method, the reliability and accuracy of evaluation can be improved.

Description

technical field [0001] The present application relates to the technical field of transformers, in particular to a transformer DC bias evaluation method. Background technique [0002] The power transformer is a very important equipment in the power system, and its operating status directly affects the safety of the power system. With the commissioning of the DC transmission line of the power system, when the single pole is running, the power transformer near the DC converter station is invaded by DC current, causing vibration, noise and loss increase and overheating problems, causing magnetic saturation of the power transformer, resulting in loss , temperature rise increases, and may cause local overheating, aggravate vibration, increase noise, and the harmonics generated by it will also cause system voltage waveform distortion and relay protection malfunction, etc., thereby affecting the safe operation of power transformers. The phenomenon that intrudes into power transform...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06F17/16
CPCG06F17/16Y04S10/50
Inventor 张繁张晶焯伍国兴黄楷敏陈龙肖黎
Owner SHENZHEN POWER SUPPLY BUREAU
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