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Full-solar-blind ultraviolet imaging quantified detection method based on photon counting technology

A photon counting and detection method technology, which is applied in the direction of measuring devices, measuring electrical variables, and testing dielectric strength, etc., can solve the problems related to the short application time of corona detection of ultraviolet imagers, and there is no system and reliable corona discharge quantitative detection. Standardization and other issues to achieve the effect of easy application

Inactive Publication Date: 2016-02-03
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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Problems solved by technology

[0005] The application of ultraviolet imager in corona detection of high-voltage live equipment has been used for a short time in China. As a new detection technology, there is no systematic and reliable corona discharge quantitative detection related regulations.

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  • Full-solar-blind ultraviolet imaging quantified detection method based on photon counting technology
  • Full-solar-blind ultraviolet imaging quantified detection method based on photon counting technology

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Embodiment Construction

[0021] The embodiment of the all-day blind ultraviolet imaging quantitative detection method based on the quantitative photon counting technology of the present invention includes the step of obtaining the ultraviolet photon count equivalent value by using the following formula:

[0022] X 5.5 = 0.33d 2 Σexp(0.4125-0.075d)*v*m*[1+(0.95-h) / 0.95](1);

[0023] X 5.5 : It is the UV photon count value when converted to the standard distance of 5.5m, referred to as UV photon equivalent value;

[0024] d: is the actual test distance, m;

[0025] Σ: is the UV photon count value detected at the test distance of d;

[0026] v: is the voltage level correction factor, 110kV and below voltage level is 1, and 220kV and above voltage level is 0.5;

[0027] m: the correction factor for the discharge position, the coefficient is 1 when the discharge position is the insulator sheath and the wire, and the coefficient is 0.3 for the other positions;

[0028] h: test environment humidity, %;

[0029] The gain ...

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Abstract

A full-solar-blind ultraviolet imaging quantified detection method based on a photon counting technology comprises the steps of: obtaining an ultraviolet photon counting equivalent value by adopting a formula shown in the specification; fixing a gain set value of a full-solar-blind ultraviolet detection instrument to the 60% position of a measuring range in a photon counting process; and carrying out photon counting in a specific area object, and carrying out counting on only a single discharge position, wherein a counting area covers all continuous points and more than 90% of stay points caused by rayleigh scattering. According to the invention, a full-solar-blind ultraviolet imaging instrument is used for detecting corona discharging, the specific position of corona discharging in a high-voltage electric device is obtained through an ultraviolet and visible light two-channel fused image in the ultraviolet imaging instrument, then ultraviolet photons at the corona discharging position are counted so as to carry out quantified analysis on the corona discharging, the influences factors such as the detecting distance, the environment humidity and the voltage level are modified, and an ultraviolet photon detection and correction formula superior to an existing standard.

Description

Technical field [0001] The invention relates to a quantitative detection method for all-day blind ultraviolet imaging, in particular to a quantitative detection method for all-day blind ultraviolet imaging based on photon counting technology. Background technique [0002] High-voltage live equipment has a wide distribution range, is located in a complex geographic environment, and has various voltage levels. Abnormal discharge is prone to occur during long-term operation. When abnormal discharge occurs in high-voltage live equipment, rapid and accurate discharge point positioning and quantitative analysis of severity can be realized, which can reduce the time required for manual inspections to check discharge points, reduce the workload of operation and maintenance personnel, and shorten the recovery of discharge defects Time, it can be monitored in the budding state of hidden dangers, and the severity of discharge can be assessed objectively and scientifically, so as to provide ...

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Application Information

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IPC IPC(8): G01R35/00G01R31/12
Inventor 王锐陈聚文彭向阳林茂余欣张显王柯麦晓明易琳黄振钱金菊
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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