Photoelectric sensor for discharge detection and discharge detection alarm method

Abstract

The invention discloses a photoelectric sensor for discharge detection, which comprises a sensor shell, a window, a secondary window sheet, an ultraviolet photosensitive element, a temperature and humidity sensor and a signal processing circuit, and is characterized in that the ultraviolet photosensitive element, the temperature and humidity sensor and the signal processing circuit are arranged in the sensor shell; the sensor shell is provided with a window and a through hole for exchanging temperature and humidity with the outside, and the window is provided with a secondary window sheet for closing the window and introducing an ultraviolet light signal; and the ultraviolet photosensitive element and the temperature and humidity sensor are connected with a signal processing circuit. The device has the advantages that surface cleaning can be carried out in the use process, the core photosensitive element is not damaged, the service life is long, the use cost can be reduced, and the device can assist in judging reasons of discharge faults in the cabinet in the detection process.

Description

technical field [0001] The invention relates to the technical field of photoelectric detection, in particular to a photoelectric sensor for discharge detection and a discharge detection and alarm method. Background technique [0002] In the power field, 10kV, 35kV and other medium-voltage switchgears, ring main unit, box-type transformer (installed in the cabinet) and dry-type transformer (installed in the cabinet) are currently commonly used high-voltage equipment. These high-voltage equipment often discharge due to problems such as high humidity or condensation in the cabinet, and the discharge will cause a short circuit to the ground, and even cause a combustion explosion in severe cases. In order to ensure the safe use of these high-voltage equipment, it is necessary to detect the discharge phenomenon of these high-voltage equipment. [0003] During the discharge process, ultraviolet light with a waveband of 80-280nm is usually generated, and the ultraviolet light in th...

AI Technical Summary

Problems solved by technology

Since the primary window is a layer of glass medium close to the sensitive unit of the core detector, it is packaged together with the photosensitive element as a whole. Once a problem occurs, the photosensitive element and the primary window need to be replaced as a whole, and the replacement cost is high; During the long-term continuous operation of high-voltage equipment, the probability of dust accumulation and condensation on the surface of the component is very high. Since the ultraviolet photosensitive component is a relatively fragile, sensitive and expensive optical component, when its surface is seriously polluted, it will affect the detection. sensitivity

If you use wiping or other methods to clean the dirt on the surface during maintenance, it is very easy to scratch or even damage the precious photosensitive element. If you directly replace the photosensitive element, the cost is very high

In addition, the current photoelectric sensors used for discharge detection do not use temperature and humidity sensors to detect the air temperature and humidity signals in the cabinet. Auxiliary judgment of the cause

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