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Air breakdown voltage prediction method and device

A technology of breakdown voltage and prediction method, which is applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., and can solve the problems of inconvenient and inability to intuitively and effectively predict the change trend of air insulation strength

Active Publication Date: 2016-04-20
GUANGZHOU POWER SUPPLY CO LTD +1
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Problems solved by technology

The electrical equipment in actual operation is under the comprehensive influence of various factors, so the relative air density and absolute humidity alone cannot fully reflect the changes in the insulation strength of the air around high-voltage electrical equipment under various complex weather conditions, nor can it be intuitive and effective Predict the changing trend of air insulation strength in the future
In addition, the first two methods use absolute humidity, but in real life, humidity is usually expressed by relative humidity, which makes it inconvenient in practical application

Method used

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  • Air breakdown voltage prediction method and device
  • Air breakdown voltage prediction method and device
  • Air breakdown voltage prediction method and device

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Embodiment Construction

[0063] The present invention uses the principal component analysis method to recombine each atmospheric parameter index into a group of new mutually irrelevant comprehensive indexes to replace the original indexes, and selects several less comprehensive indexes therefrom according to actual needs (as much as possible to reflect the original Index information), and then use the principal component normalization analysis method to process. Finally, with the support of a large number of experimental data, a comprehensive index of atmospheric discharge is proposed to reflect the variation trend of the initial voltage of air discharge in various atmospheric environments. Beginning with the derivation of the atmospheric discharge composite index below, the present invention is explained in detail.

[0064] Using the principal component analysis method to obtain the comprehensive index of atmospheric discharge includes the following steps:

[0065] 1. Establishment of the mathematica...

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Abstract

The invention discloses a method and a device for forecasting air puncture voltage. A plurality of weather indexes are subjected to dimension reduction by adopting a main component analysis method; according to weighted stacking, a one-dimensional atmosphere discharge comprehensive index is obtained and can truly reflect comprehensive characteristics of weather indexes; after the atmosphere discharge comprehensive index at certain time in the future is calculated, the change tendency of the future air puncture voltage can be forecast with reference to a relation between the previous air puncture voltage and the conventional atmosphere discharge comprehensive index and a rule; the forecast process is simple; and a forecast result is accurate and effective.

Description

technical field [0001] The invention relates to the technical field of safe operation of electric power systems, in particular to a method and device for predicting air breakdown voltage. Background technique [0002] Air is usually used as the insulating medium for the external insulation of high-voltage electrical equipment in power systems, and the discharge initiation voltage of air is affected by various meteorological factors, such as temperature, humidity, altitude, air pressure, relative air density, and so on. The power system accidents caused by the decrease of the insulating ability of the air happen frequently. Therefore, the influence of atmospheric conditions on the breakdown voltage of the air gap has attracted much attention of scholars. At present, most countries and the International Electrotechnical Commission (IEC) recommend using two parameters, relative air density and absolute humidity, to characterize the influence of atmospheric conditions on the dis...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 蚁泽沛牛海清张耿斌张尧吴倩刘毅刚
Owner GUANGZHOU POWER SUPPLY CO LTD
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