Novel transformer oil impurity concentration change interference type monitoring device and method

Abstract

The invention relates to a novel transformer oil impurity concentration change interference type monitoring device and method. The device comprises a lightning surge generator, a He-Ne laser, a Michelson interferometer and a CCD camera (Charge-coupled Device, charge-coupled device, CCD camera for short). The lightning surge generator is an electric spark generating device and simulates a dischargephenomenon. The He-Ne laser can emit a laser beam with the wavelength of 632.8 nm, and the He-Ne laser and the Michelson interferometer form an optical monitoring system to form interference fringes;the CCD camera is a semiconductor device, can convert optical images into digital signals and output the digital signals to a computer, and is a device for capturing the interference fringes. In a power system, the device takes transformer oil as a measured object, quantitatively reconstructs the phase field distribution of the transformer oil by extracting the information of an interference pattern in the transformer, and can achieve the purpose of accurately and instantly monitoring the running state of the transformer.

Description

technical field [0001] The invention relates to a transformer monitoring device, in particular to a novel interferometric monitoring device and method for the change of impurity concentration in transformer oil. Background technique [0002] Transformers have a wide range of applications and are one of the most important electrical products in power systems, especially in power transmission and transformation lines. In order to ensure the reliability and economy of power system power supply, online monitoring and fault diagnosis of transformers came into being. It can be seen from the structure of the transformer that the coils of the transformer are filled with transformer oil, which increases the dielectric constant and makes the transformer difficult to be broken down during operation, which is an important component of the transformer. During the long-term operation of the transformer, the transformer oil may be cracked and mixed with impurities, which will affect the n...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a novel transformer oil impurity concentration change interferometric monitoring device and method in order to overcome the above-mentioned defects in the prior art. In view of the complex operation and long time consumption in the prior art, real-time on-line monitoring cannot be performed and timely monitoring is not possible. For the problem of early warning, a transformer oil impurity concentration change interference monitoring device is proposed to monitor the change of transformer oil impurity concentration, and then monitor in real time whether there are electric sparks, voltage and current jumps, etc. in the transformer, and make early warnings in time

Images