A method and a device for simulating the influence of an external insulation electric field of a transformer bushing

Abstract

The invention discloses a method and a device for simulating the influence of an external insulation electric field of a transformer bushing. The method comprises the following steps: determining a plurality of variables of an environmental factor and a horizontal value thereof; according to the variables and their horizontal values, a plurality of combinations of working conditions being determined by orthogonal method; calculating a range of the electric field strength along the surface path of the umbrella skirt and a range of the electric field strength along the air gap path of the umbrella skirt according to the calculated electric field strength along the surface path of the umbrella skirt and the electric field strength along the air gap path of the umbrella skirt; according to thecalculated range difference of the two electric field intensities, the influence result of the external insulation electric field of the transformer bushing being calculated. By using orthogonal method to combine the dry variables of environmental factors and their horizontal values, the simulation data are reduced and the calculation process is simplified. At the same time, the influence degreeof different environmental factors on the external insulation electric field of transformer bushing can be obtained.

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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