A device for measuring the defect of gas-insulated combined switch basin insulator

Abstract

The invention relates to a device for measuring the defect of a basin-type insulator of a gas-insulated combined switch, and belongs to the technical field of latent fault diagnosis of high-voltage switchgear. The device includes three bushings, three bus bar guide rods and multiple pot insulators, the three bushings are placed on the casing of the gas-insulated combination switch, and the multiple pot-type insulators are fixed in the casing of the gas-insulated combination switch, and two adjacent pot-type insulators An air chamber is formed between them, and the air chamber is equipped with a gas sampling hole and an observation window, and three through holes are opened on the basin insulator. One end of the three bus bar guide rods is connected with the high-voltage line, and the other end enters into the casing of the gas combination switch through three bushings, and extends into and is fixed in the casing of the gas combination switch through three through holes. This device can complete the monitoring of SF6 gas decomposition products under three types of defects at the same time, and ensures the high consistency of the test conditions of the pot insulator defects from the applied voltage amplitude, step-down process, and pressurization time, and greatly improves the accuracy of different defects. Test efficiency and utilization of the test system.

Description

technical field [0001] The invention relates to a device for measuring the defect of a basin-type insulator of a gas-insulated combined switch, and belongs to the technical field of latent fault diagnosis of high-voltage switchgear. Background technique [0002] SF is mainly used in the transmission network of 110kV and above voltage level in my country 6 Gas-insulated switchgear, especially gas-insulated combined switch (hereinafter referred to as GIS) equipment is widely used in the power grid, and the operating status of the equipment plays a decisive role in the safe and stable operation of the power grid. With the increase of voltage level and system capacity, SF in the grid 6 The amount of switchgear installed and used is increasing rapidly, and the probability of internal insulation failure of the equipment tends to increase. Equipment defects and their status judgment are one of the key issues that need to be solved urgently. [0003] The pot insulator is one of th...

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Problems solved by technology

[0010] The device proposed by the present invention for measuring the defects of pot insulators of gas-insulated combined switches has the advantage of: after adjusting the defect degrees of different pot insulators in the device of the present invention, it can simultaneously complete the SF under three kinds of defects. 6 The monitoring of gas decomposition products solves the problems of single defect measurement, long measurement time and low measurement efficiency of existing detection devices, and ensures that the defects of basin insulators can be measured from the external voltage amplitude, step-up and step-down process, and pressurization. The high consistency of test conditions such as time can avoid the deviation of test results caused by different test conditions, which can greatly improve the test efficiency of different defects and the utilization rate of the test system, so that more defect test results can be obtained by spending the same test time , reduce the energy consumption of the test, significantly improve the test efficiency and measurement cost, and ensure that the test results are highly consistent with the actual GIS equipment operation status, greatly improving the consistency of test conditions and the accuracy of measurement results

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