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A composite insulator internal defect research method on COMSOL

A technology for composite insulators and internal defects, which can be used in instruments, calculations, electrical digital data processing, etc., and can solve problems such as insignificant differences in temperature rise

Pending Publication Date: 2019-06-18
STATE GRID HEBEI ELECTRIC POWER RES INST +2
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Problems solved by technology

But when the degree of deterioration is low, the difference in temperature rise is not obvious

Method used

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  • A composite insulator internal defect research method on COMSOL
  • A composite insulator internal defect research method on COMSOL
  • A composite insulator internal defect research method on COMSOL

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Experimental program
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specific Embodiment approach

[0036] refer to Figure 1-3 , a specific embodiment of the present invention comprises the following steps:

[0037] Step A. Use the geometry module in the COMSOL simulation software to establish a 1:1 3D model of the 110kV composite insulator.

[0038] Step B, setting continuity defects of different degrees at different positions of the composite insulator without defects, and analyzing its spatial axial electric field. Specifically include the following steps:

[0039] B1. Set corresponding materials for each part of the model according to the composite insulator string in actual operation. In step B1 of this specific embodiment, the material of the shed and sheath is silicone rubber, and the material of the head and tail connecting fittings is stainless steel.

[0040] B2. Apply corresponding potentials to the composite insulator model according to the actual operation conditions and the simulated boundary conditions. In the case of ignoring the influence of space charge...

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Abstract

The invention discloses a composite insulator internal defect research method based on COMSOL, and the method comprises the steps: A, building a 1: 1 composite insulator three-dimensional model by using a geometric module in COMSOL simulation software; And step B, setting different degrees of conductivity defects at different positions without defects of the composite insulator, and analyzing thespatial axial electric field of the composite insulator. Three-dimensional models of no defect and different defect degrees at different positions of the composite insulator are established respectively, the distribution characteristic of the spatial axial electric field of the composite insulator is studied, the defects of an existing method can be overcome, and the influence of different defectson the performance of the insulator can be found by analyzing the curve of the axial electric field.

Description

technical field [0001] The invention relates to the field of research on the axial electric field of composite insulators, in particular to a method for researching internal defects of composite insulators based on COMSOL. Background technique [0002] Composite insulating materials have gradually replaced traditional glass and ceramic insulating materials due to their small weight and good anti-pollution performance. However, the main problem that limits the wide application of composite insulators is that the current live monitoring methods cannot diagnose the insulation state of composite insulators well. The live detection methods at home and abroad mainly use visual inspection, infrared temperature measurement, and ultraviolet imaging. Based on ultraviolet imaging technology to detect the discharge dynamic characteristics of degraded insulators, when the degraded insulator is located in the middle of the insulator string, the sensitivity is low. Infrared temperature m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 刘杰贾伯岩张志猛耿江海王平夏彦卫丁斌孙翠英李抗
Owner STATE GRID HEBEI ELECTRIC POWER RES INST
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