Experiment device used for extra-high voltage alternating current-direct current gas insulated metal enclosed transmission line

Abstract

The invention relates to an experiment device used for an extra-high voltage alternating current-direct current gas insulated metal enclosed transmission line (GIL). The device is provided with the capabilities of electrification examination of an extra-high voltage alternating current and extra-high voltage direct current GIL unit segment under high voltage and large current, insulation property experiment of large size axial cylinder SF6 gas gap for the extra-high voltage alternating current and extra-high voltage direct current GIL, and flashover characteristic experiment of a pillar insulator and a disc insulator for the extra-high voltage alternating current and extra-high voltage direct current GIL, and can meet requirements for a fundamental research and the electrification examination of the extra-high voltage alternating current and extra-high voltage direct current GIL. The device comprises a left high-voltage and large current leading-in end, a right high-voltage and large current leading-in end, and a horizontal straight line section, wherein each high-voltage and large current leading-in end is vertically placed and comprises a high-voltage connection end, a high-voltage grading ring, a silicon rubber compound insulator high-voltage sleeve pipe, and a tower type cylinder, the horizontal straight line section comprises a horizontal unit cylinder, 3 disc insulators and one pillar insulator, and the horizontal unit cylinder is formed by axially arranging 4 grounded outer shells and a middle high-voltage guide rod.

Description

technical field [0001] The invention relates to the technical field of high-voltage transmission lines and insulation, in particular to a test device for UHV AC-DC gas-insulated metal-enclosed transmission lines. Background technique [0002] Gas Insulated Metal Enclosed Transmission Line (GIL: Gas Insulated Metal Enclosed Transmission Line) is a new type of transmission line that uses SF6 gas or a mixture of SF6 and N2 gas to insulate, and the shell and guide rod are coaxially arranged. It has a large transmission capacity and a small footprint. , high reliability, maintenance-free, long life, and little interaction with the environment. The research and development of this technology began in the 1960s with the aim of realizing underground transmission lines with the same transmission capacity as overhead transmission lines. High Voltage Power Corporation, the predecessor of CGIT Systems.Inc. of the United States, installed the world's first GIL at the Hudson Power Plant ...

AI Technical Summary

Problems solved by technology

Some of the existing test devices can only be used for the test of SF6 gas gap insulation characteristics and insulator flashover characteristics, and cannot be used for live assessment of GIL unit sections; some can only be used for live assessment of GIL unit sections under high voltage and cannot It is used for the live assessment of GIL under high current; some voltages can withstand low voltage levels and cannot meet the requirements of UHV AC and DC GIL large-size coaxial cylindrical SF6 gas gap insulation characteristics and related large-size insulator flashover characteristics tests

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