Insulator Structure Design for Mixed Gas Insulation

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Solution Overview

Problem

Designing an insulator structure that meets practical engineering requirements when using environmentally-friendly mixed gases as insulation medium is challenging, as existing solutions fail to effectively manage electric field distribution and temperature variations.

Innovation Solution

A method and device for designing an insulator structure involves generating multiple insulator models based on pre-set parameters, evaluating electrical parameters for electric field distribution, selecting a target model with optimal electric field strength, and optimizing the model based on thermodynamic parameters using conductivity-temperature variation curves to ensure effective temperature distribution.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If SF6 is used as insulation medium, then insulation performance is improved, but environmental harm increases

Engineering Contradiction:

Improveinsulation performanceVSAvoidenvironmental harm

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent changes the insulation medium from SF6 to environmentally friendly mixed gases (such as CO2/N2 mixtures), thereby altering the chemical composition parameter while maintaining insulation performance through optimized insulator structure design

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses composite insulation systems combining environmentally friendly gases with specially designed insulator structures that have optimized geometric parameters to achieve both environmental compatibility and electrical insulation requirements

Inventive Principle:

Principle #40Composite materials

2Ease of manufacture

If insulator structure is simplified, then manufacturing cost is reduced, but electric field distribution control deteriorates

Engineering Contradiction:

Improvemanufacturing costVSAvoidelectric field distribution control

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The patent applies local quality optimization by adjusting specific geometric parameters (such as curvature radius, surface roughness, and dimensional tolerances) at critical locations where electric field concentration occurs, while maintaining simpler geometry in non-critical areas

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent employs curved surfaces and rounded transitions instead of sharp edges at critical points to smoothly distribute electric fields, reducing field concentration effects while maintaining manufacturing feasibility through standard forming processes

Inventive Principle:

Principle #14Spheroidality (Curvature)

3Strength

If insulator dimensions are increased, then insulation strength is improved, but temperature distribution control deteriorates

Engineering Contradiction:

Improveinsulation strengthVSAvoidtemperature distribution

Core Design Contradiction:

StrengthVSTemperature

Solution Approach 1:

The patent introduces thermal management dimensions by incorporating cooling channels, heat dissipation fins, or thermally conductive pathways into the insulator structure, allowing heat to be managed in additional spatial dimensions rather than relying solely on reducing insulator size

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This approach ensures that the insulator structure meets practical engineering requirements by optimizing electric field and temperature distributions, thereby ensuring the insulator's performance with environmentally-friendly mixed gases.

Implementation Method 1

evaluating an electrical parameter of each of the insulator models at a same temperature to obtain an electric field distribution of each part of each of the insulator models; calculating tangential electric field strength, normal electric field strength, and total electric field strength

Methodology Applied

Scientific EffectElectric field: Electric Field

Implementation Method 2

evaluating a thermodynamic parameter of the target insulator model based on conductivity-temperature variation curves of an insulation material and an insulation gas to obtain a temperature distribution

Methodology Applied

Scientific EffectConductivity-temperature relationship: Conduction (electrical)

Data Source

PatentUS20240169118A1Method and device for designing insulator structure for mixed gas insulation

Publication Date: 2024.05.23 GUANGDONG POWER GRID CO LTD

AI summary

Disclosed are a method and device for designing an insulator structure for fixed gas insulation. The present disclosure inputs a plurality of sets of pre-set insulator structure parameters into an initial insulator model separately to generate a plurality of insulator models; evaluates an electrical parameter of each insulator model at a same temperature to obtain an electric field distribution of each part of each insulator model; selects a target insulator model from all the insulator models based on a pre-defined model screening condition and the electric field distribution of each part of each insulator model; evaluates a thermodynamic parameter of the target insulator model based on conductivity-temperature variation curves of an insulation material and an insulation gas to obtain a temperature distribution of each part of the target insulator model; and optimizes the target insulator model based on the temperature distribution to obtain an optimal insulator model.