Novel optical fiber temperature measurement system of transformer station high-voltage switch cabinet

Abstract

The invention belongs to the technical field of transformer substation switch cabinet temperature measurement, and particularly relates to a novel optical fiber temperature measurement system of a transformer substation high-voltage switch cabinet which comprises a lower computer and a plurality of optical fiber Fabry-Perot sensors connected with the lower computer through multiple channels, and the lower computer is connected with an upper computer through USB communication. The upper computer completes data communication, multi-channel data decoding, real-time display of multi-channel data, data storage and subsequent processing; the lower computer completes multichannel optical fiber Fabry-Perot sensing signal acquisition, processing and demodulation and completes communication with the upper computer. The system can achieve real-time on-line monitoring of the internal temperature of the closed high-voltage switch cabinet, is not electrified, has the advantages of intrinsic explosion prevention, lightning protection, corrosion prevention, electromagnetic interference resistance and the like, and can achieve real-time on-line monitoring of the internal temperature of large power cable equipment.

Description

technical field [0001] The invention belongs to the technical field of temperature measurement of a substation switch cabinet, and in particular relates to a novel optical fiber temperature measurement system of a high-voltage switch cabinet of a substation. Background technique [0002] The transformer is an important electrical equipment. During the long-term operation of the equipment, the connecting rods, fixing parts, coils, iron cores and other parts of the transformer will generate heat due to factors such as resistance and magnetic flux leakage. This heat will in turn cause the oil temperature to rise. , causing the transformer insulating oil to decompose, affecting the quality of the oil, increasing the internal pressure of the transformer, reducing the insulation performance of the insulating oil, causing the transformer to explode and burn, causing accidents and large-scale power outages. Under the normal working condition of the transformer, the temperature of th...

AI Technical Summary

Problems solved by technology

The 35kV high-voltage switchgear is used as a large number of diversion equipment in the power system. During the long-term operation of the equipment, the components in it will cause heat due to oxidation, dust, looseness, overload, poor contact, etc., and the heating parts are likely to cause safety hazards.

[0005] In order to effectively solve the above problems, the inventors of the present application researched on the temperature measurement technology of high-voltage switchgear, considering the characteristics of high-voltage switchgear such as narrow space, closed structure, difficult measurement, high voltage, etc., and analyzed the parts that are prone to failure and the generation of high-voltage switchgear in the environment of high-voltage switchgear form, and the failure mechanism was studied, and the finite element temperature analysis was carried out; a fiber-optic fiber-optic on-line temperature monitoring technology was proposed, and the sensor was placed on the high-voltage contact inside the switch cabinet to fundamentally solve the problem of contact operation in the high-voltage switch cabinet. Difficulty in temperature monitoring

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