Electrical equipment partial discharge source direction finding apparatus

Abstract

The invention discloses an electrical equipment partial discharge source direction finding apparatus. The apparatus comprises a square sensor array and an optical measurement system. Each array element of the sensor array comprises a spherical housing, a square weight placed at the center of the spherical housing and six elastic cylinders wound with fibers, wherein the six elastic cylinders are averaged into three groups, the two elastic cylinders of each group are coaxial, axes of the three groups of the elastic cylinders are mutually vertical and pass through center of the spherical housing, the axes of two groups of the elastic cylinders are respectively parallel to two vertical edges of the sensor array, one end of each elastic cylinder is bonded to one surface of the square weight, the other end of each elastic cylinder abuts against the inner wall of the spherical housing, one end of the fiber on each elastic cylinder is provided with a Faraday rotating mirror, and the other end is connected with the optical measurement system. According to the invention, direction finding is performed on partial discharge by use of fiber co-vibrating type vector array sensors, and the apparatus has the advantages of good frequency response, high anti-electromagnetic interference capability, high measurement precision, small volume, high adaptability, small influences on equipment and the like.

Description

technical field [0001] The invention relates to a device for detecting the direction of partial discharge points in insulating oil of electrical equipment, which belongs to the technical field of detection. Background technique [0002] The power system is closely related to people's life, so the reliability of power system operation is very important. The voltage level of many electrical equipment in the power system is relatively high, and insulating oil is often used for insulation. During the operation of electrical equipment, the insulating material between the electrodes often weakens the insulation capacity of the local area due to defects, aging, operating overvoltage, etc., which leads to the occurrence of partial discharge. Although partial discharge generally does not develop into insulation breakdown immediately, long-term partial discharge will lead to a decrease in the insulation capacity of the partial discharge, which is very likely to cause a serious short-...

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Problems solved by technology

This method has made great progress in the cancellation of the same-sex noise and the improvement of the signal-to-noise ratio, but the piezoelectric sensor is still used, which faces serious interference in the complex electromagnetic field environment inside the transformer, so the detection effect is still not ideal

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