A Simulation Method and Device for Influence of Transformer Bushing Outer Insulation Electric Field

Abstract

The invention discloses a method and device for simulating the influence of the insulation electric field outside the transformer bushing. The method includes: determining several variables of environmental factors and their level values; according to the several variables and their level values, adopting an orthogonal method Determining several groups of working condition combinations; calculating the extreme difference of the electric field intensity along the surface path of the shed and the electric field intensity of the air gap path of the shed according to the calculated electric field strength of the shed Extreme difference: According to the calculated extreme difference between the two electric field intensities, the influence result of the insulating electric field outside the transformer bushing is calculated. This method uses the orthogonal method to combine the working conditions of several variables and their levels of environmental factors, which reduces the simulation working condition data in the simulation research, simplifies the calculation process, and at the same time can obtain the relationship between different environmental factors. The degree of influence on the insulation electric field outside the transformer bushing.

Description

technical field [0001] The invention relates to the technical field of transformer bushings, in particular to a method for simulating the influence of an insulating electric field outside a transformer bushing. Background technique [0002] The external insulation of electrical equipment in southern my country is mainly affected by harsh weather environments such as heavy rain and pollution. After adjusting the creepage distance of insulation equipment on a large scale, pollution flashover accidents have been greatly reduced. The large-scale heavy rainfall in the south has become a stable condition for external insulation equipment. The main influence factors of reliable operation. In recent years, a large number of scholars and institutions have studied the rain flashover problem of composite post insulators and line insulators, and analyzed the rain flashover characteristics of external insulation equipment for DC systems using the flashover voltage obtained from artificial...

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Problems solved by technology

Due to the complex structure of the transformer porcelain bushing, the high material cost and the complicated manufacturing process, the cost of the bushing sample required for the test is high

[0003] Currently, simulation methods are used to optimize the shed parameters of test products to reduce the number of casing test products and the number of tests. However, most of the simulation studies use the control variable method. In the case of many environmental factors, the simulation workload is large, and It is impossible to consider the degree of influence of various environmental factors on the insulation electric field outside the transformer bushing

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