Zinc Oxide Resin Coating for Gas Insulated Switchgear
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Solution Overview
Problem
Coating films with nonlinear resistance in gas insulated switchgear struggle to maintain high electric field intensity, leading to insufficient suppression of metallic contaminants, as the resistivity decreases at low electric field strengths, affecting the insulation performance.
Innovation Solution
A coating material comprising an insulating resin with dispersion particles, where the core particles are zinc oxide with a resin layer covering the surface, increasing the electric field intensity at which resistivity begins to decrease, by optimizing the thickness and distribution of the resin layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a coating film with nonlinear resistance is used to suppress metallic contaminants, then the insulation performance is improved, but the resistivity decreases at low electric field strength, reducing the effectiveness of contaminant suppression
Solution Approach 1:
The patent applies parameter changes by carefully controlling the particle size of zinc oxide (1-10 μm) and the thickness of the resin layer (0.1-5.0 μm) to optimize the electric field intensity at which nonlinear resistance develops. This ensures the coating maintains high resistivity at low electric fields while providing effective suppression at high electric fields
Solution Approach 2:
The patent uses a composite material structure consisting of zinc oxide core particles covered with an insulating resin layer. This composite structure combines the nonlinear resistance properties of zinc oxide with the insulating properties of the resin, achieving both high insulation performance and effective contaminant suppression across different electric field conditions
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
The solution effectively enhances the electric field intensity at which resistivity decreases, improving the nonlinear resistance property and suppressing the behavior of metallic contaminants, thereby maintaining the insulation performance of the gas insulated switchgear.
Implementation Method 1
the core particle includes zinc oxide as a main component, and has nonlinear resistance
Implementation Method 2
a resin layer covering a surface of the core particle. The core particle includes zinc oxide as a main component
Implementation Method 3
the metallic contaminants are charged under the influence of an electric field generated from the center conductor to which a high voltage is applied, so that an electrostatic force is exerted in a floating direction
Data Source
AI summary
A coating material of the present invention includes an insulating resin, and dispersion particles dispersed in the insulating resin. The dispersion particle includes a core particle containing zinc oxide as a main component and having nonlinear resistance, and a resin layer covering the surface of the core particle and having an average thickness being less than or equal to 5.0 μm. The coating material of the present invention is a coating material for coating an inner surface of a ground tank of a gas insulated switchgear.