Transformer oil tank deformation monitoring and protecting integrated device and method

Abstract

The invention discloses a transformer oil tank deformation monitoring and protecting integrated device and method. The device comprises an oil pressure starting unit, a deflection real-time monitoring unit and a deflection protecting unit which are arranged on a transformer oil tank; wherein the oil pressure starting unit comprises an insulating oil pressure sensor and a first judgment element which are connected, the first judgment element is connected with the deflection real-time monitoring unit, the deflection real-time monitoring unit is connected with the deflection protection unit, and the deflection protection unit is connected with a tripping unit and an alarm unit. The pressure of the insulating oil is measured in real time through the insulating oil pressure sensor, and the oil pressure change characteristics in the transformer are monitored. The deflection transient characteristics of the metal oil tank are measured through the deflection real-time monitoring unit, and the complex physical environment of arc faults in transformer oil is met. The oil tank deformation monitoring and protecting integrated device is independent of an electric power system, does not generate harmonic interference on the electric power system, and is less interfered by measurement and model transmission.

Description

technical field [0001] The invention belongs to the field of power systems, and relates to a transformer oil tank deformation monitoring and protection integrated device and method. Background technique [0002] As the key core equipment in the power system, the stable operation of the transformer plays an important role in the reliable transmission, flexible distribution and safe use of electric energy in the power system. However, in recent years, transformer fire and explosion accidents have occurred frequently, causing huge economic losses and casualties. The arc fault inside the transformer is an important cause of transformer rupture and explosion. Once an arc fault occurs inside the transformer, the pressure of the insulating oil rises sharply. When the pressure of the insulating oil exceeds the bearing limit of the oil tank, the oil tank will be deformed and ruptured, causing a large amount of insulating oil to leak and splash, further leading to fire and explosion...

AI Technical Summary

Problems solved by technology

When the pressure of the insulating oil exceeds the bearing limit of the oil tank, the oil tank will be deformed and ruptured, causing a large amount of insulating oil to leak and splash, further causing fire and explosion accidents

For a long time, transformers are generally equipped with differential protection as the main protection for electrical quantities. However, in the transformer explosion accidents that have occurred in recent years, the electrical quantity protection cannot provide effective safety protection for transformers due to low sensitivity and poor quick movement.

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