Oil-paper insulation system breakdown voltage prediction method based on support vector machine

A support vector machine and breakdown voltage technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve problems such as loss, transformer failure, etc., to reduce test costs, simple prediction methods, and solve uncertainties Effect

Inactive Publication Date: 2017-08-22
SOUTH CHINA UNIV OF TECH +1
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Problems solved by technology

However, in recent years, transformers have frequ

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  • Oil-paper insulation system breakdown voltage prediction method based on support vector machine
  • Oil-paper insulation system breakdown voltage prediction method based on support vector machine
  • Oil-paper insulation system breakdown voltage prediction method based on support vector machine

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[0030] The purpose of the present invention will be further described in detail through specific examples below, and the examples cannot be repeated here one by one, but the implementation of the present invention is not therefore limited to the following examples.

[0031] Such as figure 1 As shown, a method for predicting breakdown voltage of oil-paper insulation system based on support vector machine includes the following steps:

[0032] S1. Select the typical oil-paper insulation structure in the transformer, determine the factors affecting the breakdown voltage, and formulate the execution table of the influencing factors;

[0033] In this example, the oil-paper tube insulation system outside the transformer winding is used as the prediction object, such as figure 2 shown. Because the oil-paper tube insulation is a multi-layer cylindrical structure, a cylindrical insulation structure is selected. The influencing factors include the height, radius, thickness, oil gap t...

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Abstract

The invention discloses an oil-paper insulation system breakdown voltage prediction method based on a support vector machine. The oil-paper insulation system breakdown voltage prediction method comprises the steps of: (1) selecting a typical oil-paper insulation structure in a transformer, and forming an influence factor execution table; (2) conducting a breakdown voltage experiment according to the influence factor execution table, and recording breakdown voltage experimental data; (3) establishing an SVM regression prediction model; (4) separating a to-be-predicted oil-paper insulation system to establish an equivalent circuit model of each insulation structure; (5) calculating a breakdown voltage of each insulation structure by utilizing the SVM regression prediction model; (6) and comparing the breakdown voltage with a withstand voltage of the equivalent circuit model of each insulation structure to obtain a predicted breakdown voltage of the oil-paper insulation system. The oil-paper insulation system breakdown voltage prediction method utilizes the support vector machine to perform prediction analysis on the oil-paper insulation breakdown voltage, is simple and efficient, is conductive to solving the uncertainty in transformer oil-paper insulation analysis, reduces the amount of oil clearance breakdown tests in transformer oil and electrical feature study, and reduces test cost.

Description

technical field [0001] The invention relates to a design of an oil-paper insulation structure inside a transformer, in particular to a method for predicting breakdown voltage of an oil-paper insulation system based on a support vector machine (SVM). Background technique [0002] As an important equipment in the power system, the power transformer is directly related to the safe operation of the entire power grid. With the optimization and upgrading of my country's power system, the voltage level and capacity of transformers are gradually increasing, and the power sector has put forward higher and higher requirements for the stability of transformer operation. However, in recent years, transformers frequently break down during operation, causing huge losses. According to statistics, more than half of transformer failures are caused by insulation problems. Therefore, it is a very critical step to calculate and analyze its insulation structure in the design stage. [0003] M...

Claims

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Application Information

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IPC IPC(8): G01R31/12
CPCG01R31/1263
Inventor 戴栋朱文宁文军李立浧罗兵廖一帆刘磊厉天威李斌唐力
Owner SOUTH CHINA UNIV OF TECH
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