Positioning device and positioning method of partial discharge source of electrical device

Abstract

The present invention discloses a positioning device and positioning method of a partial discharge source of an electrical device. The positioning device comprises a pressure differential vector sensor, a high-frequency carrier communication module and an analysis device. The pressure differential vector sensor is arranged in the insulating oil of the electrical device and configured to collect discharge information; the high-frequency carrier communication module is configured to send the transmission information of the pressure differential vector sensor to the analysis device; and the analysis device is arranged in a control chamber and configured to perform analysis of information collected by the pressure differential vector sensor to obtain the concrete position of the partial discharge source. The positioning device and positioning method of a partial discharge source of an electrical device are used for positioning the partial discharge source in the insulating oil of the electrical device, with simple structure, convenient usage and accurate positioning.

Description

technical field [0001] The invention relates to the technical field of electrical equipment detection, in particular to a device and method for detecting partial discharge positions in electrical equipment insulating oil. Background technique [0002] With the development of our country's economy, the requirements for the reliability of the power system are getting higher and higher. As the hub of the power system, the reliability of the operation of electrical equipment is directly related to the safety and stability of the power system. During the long-term operation of electrical equipment, due to problems such as insulation aging, overvoltage, or uneven structure of the insulation layer of electrical equipment, it is easy to cause local insulation performance to decline. These insulation-weakened parts will take the lead in various types of discharges, resulting in insulation. Further damage to the electrical equipment causes various short-circuit faults to occur inside ...

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Problems solved by technology

The scalar sound pressure sensor has very low sensitivity, no azimuth information of the sound field, and the target cannot be determined. In the sound intensity processing, the isotropic noise cannot cancel each other out, and the signal-to-noise ratio is low; it is also used in the detection of partial discharge in the insulating oil of electrical equipment Ordinary ultrasonic positioning devices, due to more interference and greater noise impact, sound waves may be reflected, resulting in the detection of multiple partial discharge sources that are inconsistent with the actual situation, resulting in positioning failure

[0005] The ultrasonic vector array element used in the partial discharge ultrasonic vector array positioning device of electrical equipment in the prior art includes three piezoelectric velocity sensors and a wireless data acquisition module, which can realize the accurate positioning of the partial discharge position of electrical equipment; The corresponding effect of high-frequency signals is poor, and its center of gravity must be located on the center of the ball during production, coupled with the small size and high density requirements, resulting in demanding manufacturing processes and inconvenient mass production

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