Optical detection device for corona discharge

Abstract

The invention discloses an optical detection device for corona discharge. An atmospheric ultraviolet window band imaging detection optical path thereof comprises a stray light shield, an atmospheric ultraviolet window band ultraviolet lens, an atmospheric ultraviolet window band band-pass ultraviolet filter, an ultraviolet image intensifier, a light cone, a CCD or CMOS area array image sensor, an image processing circuit and a first liquid crystal display which are arranged in sequence. A solar blind ultraviolet band non-imaging detection optical path thereof comprises a total emission mirror, a spectroscope, a solar blind ultraviolet band-pass filter, a solar blind ultraviolet lens, a multiplier phototube, a signal processing circuit module and a second liquid crystal display. The device has the main advantages that the corona detection data is more complete and reliable, and the failure level of corona discharge and discharge degree are convenient to be analyzed.

Description

technical field [0001] The invention relates to insulation fault detection equipment in power equipment or transmission lines, in particular to an optical detection device for corona discharge. Background technique [0002] Incomplete insulators in power equipment or transmission lines, polluted insulation parts, insufficient effective insulation distance of insulator strings (such as insulators with zero value, low value and broken skirt in the insulator string), broken strands of wires, etc. are likely to cause corona discharge. Corona discharge can cause a large loss of electrical energy. Moreover, the corona causes a chemical reaction in the air, and the generated ozone will damage or corrode the solid medium and metal electrodes in the gas, thereby causing line failure. In addition, corona discharge will generate high-frequency pulse currents, causing interference to radio communications. With the continuous improvement of the transmission voltage, the extension range...

AI Technical Summary

Problems solved by technology

The ultraviolet filter commonly used in our country is a vacuum interference coating filter, and the process generally can only achieve a visible light transmittance of 10. -4 , it is very difficult to reach the level of UV filters in Israeli cameras

Experiments have proved that if the vacuum interference coating filter of our country is used in the ultraviolet camera used in the daytime, the background noise will be very large, even to the extent that the corona ultraviolet signal cannot be detected

That is to say, our country does not yet have the ability to produce this kind of chemical filter, and it is facing a congenital deficiency in the development of ultraviolet imaging detection technology using the sun-blind band. UV camera

[0007] Finally, no matter DayCOR, CoroCAM ultraviolet camera or Filin flaw detector, they only detect a certain characteristic band in the corona discharge ultraviolet, either the sun-blind ultraviolet band or the atmospheric ultraviolet window band, which cannot give a whole and Comprehensive evaluation of corona ultraviolet intensity, that is, it is not convenient to determine the fault level of corona discharge

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