A Finite Element Simulation Calculation Method of Transformer Winding Capacitance

Abstract

A finite element simulation calculation method of power transformer winding capacitance, comprising: S1, using unit 122 to establish a three-dimensional model in finite element simulation software (Ansys) according to the actual size of the transformer winding and iron core; S2, setting the transformer oil relative dielectric constant; S3, use the grid division command that comes with Ansys software to divide the model into finite elements; S5, set the outer surface of the fuel tank 4 as a node set; S5, after setting the winding, set the ground electrode as a node set As a whole, its number is the maximum number of the winding + 1; S6, use the CMATRIX command flow that comes with ANSYS to calculate the inter-winding capacitance and the winding-to-ground capacitance to obtain the simulation results. The invention can better calculate the capacitance values ​​of the windings of different transformer structures to the ground and between the windings, greatly simplifies the workload and reduces unnecessary waste.

Description

technical field [0001] The invention relates to a finite element simulation calculation method for the winding capacitance of a power transformer. Background technique [0002] Today, electric energy is widely used in various industries and is the main driving force for the development of science and technology and the growth of the national economy. People's daily life cannot do without it. With the rapid development of the economy, my country's demand for electric energy is gradually increasing, which makes the scale of the power grid become larger and larger. As one of the important electrical equipment in the power system, the reliability of the power transformer has become an essential part of the research and operation of the power system. Accidents of power transformers are inevitable during system operation, which may eventually cause large-scale power outages. [0003] According to relevant data, short-circuit fault is one of the main causes of transformer damage,...

AI Technical Summary

Problems solved by technology

Therefore, it is extremely necessary to study the variation of capacitance parameters when transformer windings undergo different deformations. However, using actual transformers to study the relationship between winding deformation and capacitance parameters will cause great waste. Therefore, it is necessary to find a reasonable, efficient and It is very important to get the transformer winding capacitance in a cheap way

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