Transformer fault diagnosis system and diagnosis method based on vibration signal analysis

Abstract

The invention provides a transformer fault diagnosis system based on vibration signal analysis. The fault diagnosis system comprises a vibration signal sensor, an A / D conversion unit, a control processing unit, a storage unit, a display unit, a key input unit, an alarm unit, and a communication unit. The fault diagnosis system analyzes and calculates collected vibration signals, determines whethera transformer is abnormal and vibrates, and further determines whether the transformer needs to be shut down for maintenance. If the transformer is abnormal, an alarm signal is emitted timely. The invention provides the transformer fault diagnosis system based on vibration signal analysis and a diagnosis method. The transformer to be detected and a normal operation transformer carry out parallelcomparison, and the state of a power transformer can be safely and reliably monitored.

Description

technical field [0001] The invention belongs to the technical field of electric power detection, and in particular relates to a transformer fault diagnosis system and a diagnosis method based on vibration signal analysis. Background technique [0002] Electric energy is an indispensable and important form of energy for the development of a country's industrialization, and people pay more and more attention to the safety and stability of the power system. Power transformers are connected to power grids of different voltage levels and are one of the important components of power systems. The operation of power transformers will directly affect the safety and reliability of power systems. [0003] Power transformer faults are mainly core and winding faults. During the transportation and assembly of power transformers, it is easy to cause uneven stress on the iron core and windings, resulting in hidden dangers of deformation; long-term grid-connected operation of power transfor...

AI Technical Summary

Problems solved by technology

During the transportation and assembly of power transformers, it is easy to cause uneven stress on the iron core and windings, resulting in hidden dangers of deformation; long-term grid-connected operation of power transformers will lead to insulation aging, resulting in a decrease in the ability to withstand over-current and over-voltage, and also It is easy to deform the winding and iron core, causing failure

The failure of the power transformer not only causes its own damage, but also causes the collapse of the adjacent power grid in serious cases, and the outage of the power system will directly affect people's production and life, and may even threaten people's lives and property safety

[0004] At present, the analysis and judgment of the operation status of power transformers mainly rely on preventive tests and regular maintenance, and most of them need to be shut down for operation, which will cause certain inconvenience and economic losses

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