Substation high-voltage cable oil charge terminal air-crossing detection alarm system and transformer station high-voltage cable oil charge terminal air-crossing detection alarm method

Abstract

The invention relates to a transformer substation high-voltage cable oil charging terminal air-crossing detection alarm system and method, and the system comprises a high-voltage cable oil charging terminal, a hydrogen-sensitive combined sensor with an air-crossing charging function, and an external combined device which automatically executes an alarm action. The hydrogen-sensitive combined sensor is internally packaged in the high-voltage cable oil-filled terminal and provides a working power supply through air charging, and the external combined device is arranged outside the high-voltage cable oil-filled terminal and comprises an external bidirectional radio frequency device, an air charger, a control module and an alarm device. The hydrogen-sensitive combined sensor wirelessly sends detection information to an external combined device through a built-in bidirectional radio frequency device, and the external combined device automatically controls work and fault alarm. The system and the method are beneficial to timely discovery of terminal faults, and are good in sealing insulation.

Description

technical field [0001] The invention belongs to the field of electric equipment, and in particular relates to a space detection and alarm system and method for an oil-filled terminal of a high-voltage cable in a substation. Background technique [0002] The oil-filled terminals of high-voltage cables in substations need to be kept strictly sealed for long-term operation in high-voltage environments. The outer porcelain sleeves of the equipment have high insulation requirements. If direct attachment or installation of detection devices on the outer surface will affect the insulation, resulting in reduced creepage distance and Negative effect of increased leakage current. Therefore, it is strictly forbidden to directly install any detection instruments and devices on the surface of the high-voltage cable oil-filled terminal. The existing detection methods are difficult to detect early faults inside the cable oil-filled terminal, especially latent faults and fault germination. ...

AI Technical Summary

Problems solved by technology

[0007] The first method above is to detect the oil-filled terminals of high-voltage cables in substations when there are abnormal electric and magnetic changes, such as non-electrical faults that do not involve electric and magnetic changes, or It is not obvious and often cannot be detected; the second method requires a power outage to test; and the latter two methods cannot detect problems in time

Therefore, whether it is one of the above four methods or a combination of the four methods, it is impossible to find hidden or early embryonic faults inside the oil-filled terminals of high-voltage cables in time.

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