A dual-redundant sealed protection structure, system, and control method for an 800kV GIS operating mechanism based on environmental adaptive adjustment.

CN122148744APending Publication Date: 2026-06-05GANSU HUADIAN TENGGER GREEN ENERGY CO LTD JINCHANG POWER GENERATION BRANCH

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Patent Information

Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner: GANSU HUADIAN TENGGER GREEN ENERGY CO LTD JINCHANG POWER GENERATION BRANCH
Filing Date: 2026-02-24
Publication Date: 2026-06-05

AI Technical Summary

Technical Problem

Traditional 800kV GIS equipment is prone to sealing system failure and SF6 gas leakage in extreme environments. Extremely fast transient overvoltages can impact insulation components, and the protection is insufficient to prevent the intrusion of fine sand and dust, leading to equipment wear and corrosion.

Method used

It adopts a dual-redundant sealed protection structure for the 800kV GIS operating mechanism based on environmental adaptive adjustment, combined with thermal elements and asymmetric stepped sealing grooves, and an environmental adaptive control unit to monitor and adjust the sealing specific pressure in real time. It integrates opening and closing resistor components to suppress overvoltage and uses a labyrinth-type casing to protect against sand and dust.

Benefits of technology

It effectively reduces the sealing leakage rate to 0.01%, suppresses overvoltage amplitude by 15%, and improves the protection level to IP65, ensuring long-term stable operation and insulation reliability of the equipment in extreme environments.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application relates to the technical field of high-voltage power transmission and distribution equipment, and discloses an 800kV GIS operating mechanism double-redundancy sealing protection structure, system and control method based on environmental self-adaptive adjustment, which comprises a cylinder body, flanges are connected to the two sides of the cylinder body, a buffer cavity is arranged in the middle of the inner side of the cylinder body, first and second sealing grooves are arranged on the two sides of the inner wall of the buffer cavity; a thermal element is connected to the end of the inner wall of the first sealing groove, a first O-shaped sealing ring is connected between the thermal element and the inner wall of the first sealing groove, the double-redundancy structure with differentiated main and auxiliary sealing functions is adopted, in the main sealing structure, the first sealing groove adopts an asymmetric stepped structure, and the phase change characteristic of the thermal element is matched, when the temperature is lower than -20 DEG C, the thermal element is changed from a flat state to a wave expansion state, a compensation force in the vertical direction is converted into a wedge-shaped extrusion force on the first O-shaped sealing ring, and the leakage hidden danger under the extreme temperature difference is fundamentally solved.

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