Insulation defect detection device and method for transformer bushing

Abstract

The embodiment of the invention provides an insulation defect detection device and method for a transformer bushing. The insulation defect detection device comprises a quantum sensor, an electron paramagnetic resonance spectrometer and a processor, wherein the quantum sensor is arranged on the outer surface of the transformer bushing; the electron paramagnetic resonance spectrometer comprises a laser generator and a microwave transceiver, and is used for controlling the laser generator to emit laser to the quantum sensor to excite the quantum sensor, controlling the microwave transceiver to emit a microwave signal to the quantum sensor and receive a microwave signal fed back by the quantum sensor, and obtaining the distribution characteristics of the electric field and / or magnetic field intensity of the transformer bushing; the processor is used for judging whether or not the transformer bushing has a defect based on the distribution characteristics and determining the defect type in the condition that it is judged that the transformer bushing has a defect. The insulation defect detection device can conduct detection based on the distribution characteristics of the electric field and / or magnetic field of the transformer bushing and figure out the defect type of the transformer bushing.

Description

technical field [0001] The invention relates to transformer bushings, in particular to an insulation defect detection device and method for transformer bushings. Background technique [0002] Electrical equipment is an important component of the power system, and its normal and stable operation is an important basis for the safe and reliable operation of the power system. However, defects in insulation problems are caused by raw materials, design, manufacturing process, transportation, installation and other reasons. If it is not discovered in time, defects such as local overheating and even partial discharge may occur during operation, which may even cause equipment to catch fire and explode, seriously affecting the power grid and personal safety. At present, the state detection methods of electrical equipment such as bushings and transformers mainly include infrared temperature measurement and relative dielectric loss factor measurement. Infrared temperature measurement ...

AI Technical Summary

Problems solved by technology

Infrared temperature measurement can detect current-induced heating defects and overall voltage-induced heating defects sensitively, but it is difficult to find serious defects of small-scale concentrated type, and such defects may develop rapidly and lead to malignant failures; relatively The measurement of dielectric loss factor requires the modification of the end screen of the equipment, which increases the risk of equipment operation, and it is also difficult for this type of measurement technology to find serious defects concentrated in a small area

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