Transformer oil conservator defect monitoring device and detection method based on edge calculation

Abstract

The invention belongs to the technical field of electric power oil immersion equipment oil conservators, and particularly relates to a transformer oil conservator defect monitoring device and detection method based on edge computing, the monitoring device comprises a sensing terminal, an edge intelligent gateway, a monitoring terminal, an oil conservator defect monitoring cloud platform and a client terminal, the edge intelligent gateway and the monitoring terminal are both arranged in a transformer substation, the sensing terminal comprises a gas flow meter, an oil temperature sensor, an environment temperature sensor and a microwave oil level measuring assembly, and the sensing terminal sends detection data information to the edge intelligent gateway; the intelligent oil conservator defect detection system can timely identify and judge five defects of capsule damage of the oil conservator, partial blockage of a breathing circuit, leakage of the breathing circuit, existence of moisture impurities in a breathing connecting pipe and false oil level of the oil conservator, and evaluate the severity of the defects of the oil conservator.

Description

technical field [0001] The invention belongs to the technical field of oil conservator for electric power oil immersion equipment, and in particular relates to a defect monitoring device and detection method for a transformer oil conservator based on edge computing. Background technique [0002] Oil-immersed transformer is the most important equipment in power transmission and transformation equipment, and its safe and reliable operation is very important. The oil conservator is one of the most important components in the oil-immersed transformer. Its function is mainly to buffer the volume change caused by the temperature change of the oil in the oil tank during the operation of the transformer. The oil conservator is set above the transformer oil tank, usually communicated with the moisture absorber, and kept unimpeded with the external atmosphere. When the transformer oil temperature rises, the oil volume expands, and the oil conservator exhales gas to the outside; when ...

AI Technical Summary

Problems solved by technology

[0003] In the electric power industry, due to the long-term operation of the transformer, oil conservator failures often occur, which brings great difficulties to the operation and maintenance of the transformer, and in severe cases, the transformer is damaged and shut down

In a DC transmission project, the oil conservator air bag of the converter transformer ruptured several times, which seriously threatened the stable operation of the DC transmission project.

At present, the main problems in the operation of the oil conservator are: first, the capsule is aging, cracked or damaged due to improper installation, so that it loses its protection function, and at the same time, it is difficult to observe whether the capsule is damaged or folded inside the oil conservator; It is the connection between the oil conservator and various components and pipelines. Due to transformer vibration and poor installation quality, leakage is prone to occur, and moisture in the air enters, affecting the quality of the oil and causing insulation reduction; the third is that the desiccant of the desiccant absorbs moisture and agglomerates The blockage of the moisture absorber will cause the breathing circuit of the oil storage tank to be blocked, and in serious cases, the oil injection of the transformer will be shut down; the fourth is the false oil level in the oil storage tank, which is not easy to find in daily inspections and seriously affects the safe operation of the transformer.

However, the calculation process of the health state value does not consider the operating principle of the oil conservator, and involves as many as 9 sensors. The long-term operation of these internal sensors is likely to induce other problems, resulting in failure of the transformer oil conservator and damage to the transformer.

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