Long-gap discharge leader development speed measurement method based on radiated electromagnetic wave detection

Through a detection method based on radiated electromagnetic waves, a high-frequency antenna and a high-speed oscilloscope are used to measure the time difference of electromagnetic waves radiated by the discharge leader, and combined with geometric algorithms to calculate the leader length and development speed, the problem of insufficient measurement accuracy in the existing technology is solved, and a 0.1ns level is achieved time resolution and high-precision measurements.

CN106370938AInactive Publication Date: 2017-02-01WUHAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
WUHAN UNIV
Filing Date
2016-08-26
Publication Date
2017-02-01
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

⚠Technical Problem

It is difficult to accurately measure the development speed of long-gap discharge leaders with existing technology. The maximum time resolution is 1 μs, which cannot meet the demand for higher-precision measurement in UHV power transmission.

⚗Method used

Using a detection method based on radiated electromagnetic waves, a high-frequency antenna and a high-speed oscilloscope are used to measure the time difference of the electromagnetic waves radiated by the discharge leader, and a geometric algorithm is used to calculate the leader length and development speed to achieve a time resolution of 0.1ns.

🎯Benefits of technology

It effectively improves the measurement accuracy of the discharge leader development speed, and the resolution reaches 0.1ns level, meeting the demand for high-precision measurement in UHV power transmission.

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Abstract

The invention relates to a long-gap discharge leader development speed measurement method based on radiated electromagnetic wave detection. The method comprises a set of high-frequency antennas and a high-speed oscilloscope and a long-gap discharge leader development speed calculating method. The method adopts a certain antenna arrangement form; long-gap discharge radiated electromagnetic wave pulse time is detected simultaneously through the plurality of antennas; leader head position is positioned according to time difference of a signal arriving at different antennas; and furthermore, the long-gap discharge leader development speed can be calculated. The method can effectively improve the measurement precision of the discharge leader development speed, and resolution reaches the level of 0.1 ns.
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