Diagnosis system and method for fault classification and positioning of transformer winding

A technology for transformer winding and fault classification, which is used in transformer testing, electrical winding testing, instruments, etc. to achieve good and stable effects.

Active Publication Date: 2021-05-07
CHINA THREE GORGES UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The invention makes fault classification and positioning problem diagnosis effect good

Method used

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  • Diagnosis system and method for fault classification and positioning of transformer winding
  • Diagnosis system and method for fault classification and positioning of transformer winding
  • Diagnosis system and method for fault classification and positioning of transformer winding

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Embodiment Construction

[0051] Such as figure 1 As shown, the diagnostic system for transformer winding fault classification and location, the system calls the virtual channel creation, triggering, timing, reading, writing and other functions of the NI-DAQ toolbox in the labview software to realize the construction of the data acquisition system. The system includes the following module parts:

[0052] Frequency scanner 1, transformer winding 2, detection terminal 3;

[0053] The frequency scanner 1 is connected to one end of the inductor L1, the other end of the inductor L1 is connected to one end of the voltage dividing resistor R1, and the other end of the voltage dividing resistor R1 is connected to the grounding point N of the transformer winding.

[0054]One end of the high-voltage winding A of the transformer winding 2 is connected to the grounding point N, and the other end of the high-voltage winding A of the transformer winding 2 is connected to one end of the capacitor C, and the other en...

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Abstract

The invention discloses a diagnosis system and method for fault classification and positioning of a transformer winding. The system comprises a sweep generator, a transformer winding, a detection terminal, an inductor L1, a divider resistor R1, a divider resistor R2 and a capacitor C. The sweep generator outputs a sweep-frequency signal, the sweep-frequency signal is input to the transformer winding from a grounding point N through the inductor L1 and the divider resistor R1, flows through a high-voltage winding A in the transformer winding and is output, and after the sweep-frequency signal passes through a capacitor C and is divided by the divider resistor R2, sweep-frequency data is collected by the detection terminal; and the detection terminal diagnoses the fault type and position of the transformer winding through a constructed deep learning convolutional neural network model. According to the method, the fault positioning problem is solved on the basis of realizing high-precision fault type diagnosis, and the method has certain engineering significance. The method and the system have a good effect on a simulation sample constructed in the invention, the fault type diagnosis precision is up to 100%, and the fault positioning accuracy is up to 83.33%.

Description

technical field [0001] The invention relates to the field of fault diagnosis of electrical equipment, in particular to a diagnosis system and method for fault classification and location of transformer windings. Background technique [0002] As an internal fault, transformer winding fault is a cumulative fault. The frequency response method has high sensitivity to winding faults. Compared with other detection methods, it can detect faults more timely and effectively, and prevent undetected small deformations from gradually evolving into larger deformation faults, which pose a threat to the operation of the power grid, so it has received widespread attention. Among the existing diagnostic methods, a large number of studies have used the frequency sweep impedance method to analyze the single fault sweep curve and the change of impedance value. However, the impedance value does not vary monotonically with the fault location. Only using the impedance value as a criterion cann...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/72G01R31/52G01R31/62G06K9/62G06N3/04
CPCG01R31/72G01R31/52G01R31/62G06N3/049G06N3/047G06F18/2415G06F18/214
Inventor 李振华张宇杰卢梦瑶王中李红斌谢辉春姚为方吴琳
Owner CHINA THREE GORGES UNIV
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