High-potential current acquisition system with rain-proof function

Abstract

The invention relates to a high-potential current acquisition system with a rain-proof function, which comprises a data acquisition box, a data receiving device and a trigger device, wherein the dataacquisition box comprises a shielding box, a data acquisition case and an adjustable resistor, the data acquisition case and the adjustable resistor are installed in the shielding box, the shielding box is connected with a high voltage wire and hung on a cross arm through an insulator, one end of the adjustable resistor is electrically connected with the shielding box, the other end is electrically connected with a discharge electrode below the shielding box through a conductive copper strip which is externally provided with an insulating layer, a resistance control line and a voltage measurement cable of the adjustable resistor are connected with the data acquisition case, and the data acquisition case exchange information with the data receiving device and the trigger device through an optical fiber. According to the invention, the data acquisition part of the high voltage side is placed in the metal shielding box, and information transmission between the high voltage side and the low voltage side is realized through the optical fiber, thereby not only being capable of shielding various types of electromagnetic interference and ensuring the electrical insulation between the highvoltage side and the low voltage side, but also being suitable for being used in a rain condition and creating favorable conditions for the research on air gap discharge under the raining state.

Description

technical field [0001] The invention relates to a high-potential current acquisition system that can be used under conditions of rain and strong interference, and belongs to the field of measurement technology. Background technique [0002] In EHV / UHV transmission lines, air is the most common insulating medium, and insulation flashover and breakdown faults are one of the most important hazards in transmission systems. The UHV line has greatly increased the voltage level of the line, and the increase in the voltage level has also led to a substantial increase in the insulation requirements of line equipment. The research on long air gap discharge is even more important. Scholars at home and abroad have conducted a large number of experimental studies on the breakdown process of the air gap under dry conditions, and the results show that the breakdown voltage will show a "saturation" trend with the increase of the gap length. However, scholars have conducted very limited res...

AI Technical Summary

Problems solved by technology

[0005] The existing high-voltage side pre-discharge current measurement device has achieved good measurement results in the long-gap discharge experiment, but there are still some problems, such as the short continuous working time of the power supply, the bulky size is not convenient for disassembly and charging, and the remote intelligence of the equipment cannot be realized. Control, high cost and single trigger method

In addition, due to the lack of research on long-gap discharge experiments under raining conditions, the existing measurement devices did not consider the problem of rain protection when designing, so it is necessary to improve

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