Insulation defect detection apparatus and method for current transformer

Abstract

The embodiment of the invention provides an insulation defect detection apparatus and method for a current transformer. The insulation defect detection apparatus comprises a quantum sensor arranged near a current transformer, a laser generator for emitting laser to the quantum sensor to excite the quantum sensor, a microwave transceiver for transmitting a microwave signal to the quantum sensor andreceiving a microwave signal fed back by the quantum sensor, an electron spin resonance spectrometer for starting the laser generator and the quantum sensor and acquiring distribution features of theelectric field and / or magnetic field intensity of the current transformer in space based on the fed back microwave signal, and a processor for determining whether the current transformer has a defectbased on the detected distribution features of the electric field and / or magnetic field intensity and determining the type of the defect if the current transformer has a defect. With the insulation defect detection apparatus, the distribution features of the electric field and the magnetic field of the current transformer can be detected and the defect type of the current transformer is determined.

Description

technical field [0001] The invention relates to a current transformer, in particular to an insulation defect detection device and method for a current transformer. 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, raw materials, design, manufacturing process, transportation, installation and other reasons will cause defects in insulation problems. If it is not discovered in time, problems such as local overheating and partial discharge may occur during operation, and 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 can det...

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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 detect 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 of small-scale concentration

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