Transformer internal partial discharge determination device and positioning method thereof

Abstract

The invention discloses a transformer internal partial discharge determination device and a positioning method thereof, and solves the problems that existing transformer partial discharge determination is big in error and low in performance cost; the top of a cylinder sensor mount (4) is provided with 7 ultrasonic sensor plug slots (5) and ultrasonic sensors (6) arranged in an L-shape; a spring (7) is arranged between the bottom of a cylinder groove (3) and the bottom of the cylinder sensor mount (4); an ultrasonic signal leading-out wire (8) of the ultrasonic sensor (6) is electrically connected with an ultrasonic data collector (9) through a through hole (11); the ultrasonic data collector (9) is connected with a computer (10); L-shape array sensors are employed, a wideband focusing algorithm of a total least spuares (TLS) is used for focusing partial discharge ultrasonic broadband signals, and a narrowband direction finding algorithm combining a phase match principle with cloud optimization search is used for obtaining orientation information of a partial discharge source. The transformer internal partial discharge determination device is high in direction finding precision, and accurate in positioning.

Description

technical field [0001] The invention relates to a measuring device for partial discharge inside a transformer, in particular to a measuring device and a measuring method for partial discharge inside a transformer. Background technique [0002] The detection and precise location of transformer partial discharge are of great significance to timely discovering latent insulation defects inside electrical equipment and preventing accidents. The traditional transformer partial discharge location method is to measure the position of the partial discharge point inside the transformer through an ultrasonic sensor moving back and forth on the outer wall of the transformer when the partial discharge abnormality occurs in the transformer. This measurement method has poor measurement accuracy and low work efficiency. The problem. The existing technology starts to adopt the method of arranging ultrasonic array sensors on the surface of the transformer to measure the partial discharge po...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a transformer internal partial discharge measurement device and its positioning method, which solves the technical problems of large errors and low cost performance in the existing transformer partial discharge measurement

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