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A Transformer Winding State Detection Method Based on Oscillation Wave Characteristics

A technology for transformer winding and state detection, which is used in electrical winding testing and other directions to achieve the effect of improving detection accuracy

Active Publication Date: 2022-07-19
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, there is no relevant evaluation standard for identifying the winding state based on the oscillatory wave. To solve this problem, the patent of the present invention introduces a transformer winding state detection method based on the characteristics of the oscillatory wave, which has the advantages of accurate detection of the winding state and a clear process. For It is of great significance to ensure the operation reliability of the power system

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  • A Transformer Winding State Detection Method Based on Oscillation Wave Characteristics
  • A Transformer Winding State Detection Method Based on Oscillation Wave Characteristics
  • A Transformer Winding State Detection Method Based on Oscillation Wave Characteristics

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Embodiment Construction

[0026] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0027] like figure 1 As shown, a transformer winding state detection method based on oscillating wave characteristics, the method includes:

[0028] (1), build as figure 2 As shown in the oscillatory wave test system, the platform is mainly composed of a high-voltage high-frequency power supply (1), a signal collector (2), a computer (3), an input bushing (41), an output bushing (42), and a transformer box (5). ) and winding (6); when the system is working, turn on the high-voltage and high-frequency power supply (1), inject high-frequency and high-voltage signals from the head end of the winding (1) through the input sleeve (41), and the signal collector (2) from the output sleeve The tube (42) collects the voltage signal at the end of the winding (6), transmits the data to the computer (3) for storage and de-noising processing, selects the voltage data signal wit...

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Abstract

The invention discloses a transformer winding state detection method based on oscillating wave characteristics. First, the waveform similarity WS of the oscillating wave between the winding to be detected and the normal winding is calculated to determine whether the winding to be detected is faulty; then the oscillation between the winding to be detected and the normal winding is calculated. The waveform coincidence rate WC of the wave can distinguish winding short-circuit or winding deformation; after judging the winding deformation, perform function fitting on the oscillating wave data, calculate the area shift rate AM of the oscillating wave between the winding to be detected and the normal winding, and distinguish the radial deformation of the winding. or axial deformation.

Description

technical field [0001] The present application relates to the technical field of fault diagnosis of power equipment, and in particular to a method for detecting the state of transformer windings based on oscillating wave characteristics. Background technique [0002] Transformer is one of the most important high-voltage equipment in the power system and high-speed rail traction system. At the same time, the transformer is also one of the equipment with a high failure rate in the power system. Once a fault occurs, it will often cause huge losses to safety production and even the national economy. . The fault of the transformer winding is the main reason for the damage of the transformer. When the transformer is short-circuited, the winding is also deformed by the huge impact electric force. Under the cumulative effect of the electric force, when the winding is seriously deformed, the insulation is destroyed and the short circuit is caused. In severe cases, the transformer wil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/72
Inventor 周利军员秀程周猛
Owner SOUTHWEST JIAOTONG UNIV