Oscillatory wave test platform under winding axial displacement and evaluation method

Abstract

The invention discloses an oscillatory wave test platform under winding axial displacement and an evaluation method. The test platform is composed of a box body (8), a winding axial displacement simulation device (7), a sleeve (41), a sleeve (42), an iron core (5), a winding (6), a high-voltage square wave power supply (1), an oscilloscope (2) and a computer (3). The computer (3) controls the winding axial displacement simulation device (7) to work; the high-voltage square wave power supply (1) generates a detection signal; a detection signal is injected from the head end of the winding (6) through the sleeve (41) and flows out from the tail end of the winding (6) through the sleeve (42); the oscilloscope (2) collects data from the sleeve (42) and transmits the data to the computer (3); and quantitative analysis on the axial displacement degree is carried out by calculating an axial displacement similarity coefficient Sxy. Changes of winding oscillatory waves under various axial displacement faults can be effectively simulated, characteristic parameters are extracted for research, and the method can be used for research and provides reference for engineering practice.

Description

technical field [0001] The invention belongs to the technical field of transformer fault simulation, and in particular relates to an oscillatory wave test platform and an oscillatory wave evaluation method under axial displacement of windings. Background technique [0002] As one of the core equipment in the power system, the transformer’s stability and reliability are related to the normal operation of the entire system. The axial displacement fault is one of the common faults of the transformer. When the axial displacement fault occurs in the transformer, the winding wire The cake is deformed, the stability is destroyed, the mechanical properties of the winding will gradually decrease, and the cumulative effect is prone to occur under the impact of electromagnetic force, which will further cause more serious faults, and even cause the transformer to burn out, causing major economic losses and even safety problems. Therefore, it is of great significance to take timely and e...

AI Technical Summary

Problems solved by technology

[0004] At present, the existing transformer winding axial displacement fault simulation wiring is cumbersome and difficult to operate, and too many wiring will interfere with the field test

However, there is no research on the specific changes of the transformer winding oscillation wave during axial displacement, that is, the change of winding oscillation wave when axial displacement occurs.

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