Environment-friendly gas insulated transmission line with new form of gas-solid composite insulation

By preparing a three-dimensional nanoporous corn starch/polyorganosiloxane composite insulating material and combining it with insulating gases such as CO2, the problems of insufficient insulation performance and environmental protection in GIL were solved, realizing a gas-solid composite insulating material with high insulation and environmental protection, and improving the insulation performance and stability of GIL.

CN117747219BActive Publication Date: 2026-07-24CHONGQING UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHONGQING UNIV
Filing Date
2023-11-28
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

In existing gas-insulated transmission lines (GIL), epoxy resin insulators have insufficient insulation performance and poor stability, and the environmental problems of traditional greenhouse gas SF6 are serious. Nanocomposite dielectrics have problems such as particle agglomeration, interface polarization effect and limited performance improvement in application. New environmentally friendly gases are prone to liquefaction in cold regions and the insulation strength of mixed gases is insufficient.

Method used

A composite insulating material with a three-dimensional nanoporous structure was prepared by combining corn starch with methyltrimethoxysilane to replace SF6. Insulating gases such as CO2 were used to fill the nanoporous structure to form a gas-solid composite insulating system.

Benefits of technology

A novel composite insulation material with high insulation, low dielectric loss, lightweight, renewable and environmentally friendly properties has been developed, which significantly improves the breakdown field strength, enhances the insulation performance and stability of GIL, and reduces the size of the equipment.

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Abstract

The application discloses an environment-friendly gas insulated transmission line with a new gas-solid composite insulation form, and is based on a traditional gas insulated transmission line GIL; a starch / polyorganosiloxane biological composite super-electric insulation material with a three-dimensional nanopore structure is combined with insulation gas to form a gas-solid insulation medium, and SF6 is replaced to fill in a metal shell layer; and the insulation gas is filled in the three-dimensional nanopore structure of the starch / polyorganosiloxane biological composite super-electric insulation material. The GIL filled with the environment-friendly composite insulation dielectric combined with the insulation gas such as CO2 has excellent insulation performance and dielectric performance; for example, the breakdown field strength of a GIL scale model with CO2 is as high as 36.67 kV / mm ‑1 , and the maximum increment is 744.44%.
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