Dry-type air-core reactor turn-to-turn short circuit fault positioning method and system

Abstract

The invention discloses a dry-type air-core reactor turn-to-turn short circuit fault positioning method and system, and relates to the technical field of power transmission and transformation equipment fault localization. Firstly, according to the comparison between the change rate delta P of a reactor active power loss real-time monitoring value relative to a normal operation value and a turn-to-turn short circuit active power loss change rate threshold value Px, a turn-to-turn short circuit fault is obtained; determining whether a turn-to-turn short circuit fault occurs in the dry-type air-core reactor winding; if the turn-to-turn short-circuit fault occurs, measuring the magnetic induction intensity of each annular position, at different heights and at vertically symmetrical positions, respectively calculating and comparing the absolute value of the difference between the magnetic induction intensity of each position and the magnetic induction intensity of the middle part, and sequentially determining the annular position and the axial position of the turn-to-turn short-circuit fault winding; the system comprises a data acquisition unit, a data transmission unit, a data processing unit and a human-computer interface, according to the method, the active power loss change rate and leakage magnetic field analysis are combined, the accuracy and positioning efficiency of fault diagnosis are improved, and non-intrusive detection is realized.

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