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

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...

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Problems solved by technology

However, in recent years, transformers have frequently failed during operation, causing huge losses

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