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Method and system for detecting abnormal oil level of oil-immersed transformer body

An oil-immersed transformer, anomaly detection technology, applied in the display of liquid level indicator through pressure measurement, liquid/vacuum degree for liquid tightness measurement, instruments, etc., can solve the problem of inability to accurately judge the actual oil level of the transformer body, etc. problems, to achieve the effect of early warning of faults and avoidance of tripping events

Active Publication Date: 2022-04-08
GUANGZHOU BUREAU CSG EHV POWER TRANSMISSION
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Problems solved by technology

[0010] In view of the above problems, the present invention proposes a method and system for detecting abnormal oil level of an oil-immersed transformer body, which mainly solves the technical problem that the method of calculating the theoretical value of the oil level of the transformer body by theoretical formulas cannot accurately judge the actual situation of the oil level of the transformer body

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  • Method and system for detecting abnormal oil level of oil-immersed transformer body

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[0037] In order to deepen the understanding of the present invention, the present invention will be further described below in conjunction with the examples, which are only used to explain the present invention, and do not constitute a limitation to the protection scope of the present invention.

[0038] In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral Ground connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary. It can be said that the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations. The technical solutions of the present inve...

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Abstract

The invention discloses a method and system for detecting an abnormal oil level of an oil-immersed transformer body, which comprises a linear relationship between the oil level of the transformer and the change of the oil temperature within the oil level range of 30% to 70%, and the actual oil level of the transformer is directly obtained through readings value and the actual oil temperature value; at a certain oil temperature value, set the fluctuation range value of the oil level value and the error value of the oil temperature value, and obtain the upper limit value and lower limit value of the oil level through linear relationship calculation; if If the oil level value is not within the range formed by the upper limit value and the lower limit value, there is an abnormal signal in the output oil level. The invention calculates the upper limit value and lower limit value of the transformer oil level by fitting the transformer to the transformer oil level and oil temperature curve, and compares the actual oil level with the upper limit value and lower limit value to realize abnormal fault detection of the transformer oil level and compare the actual oil level periodic sampling with the lower limit value to further judge the oil leakage fault of the transformer body, realize early warning of faults, and help real-time monitoring of changes in the internal oil level of the transformer.

Description

technical field [0001] The invention relates to the technical field of transformer oil level detection, in particular to a method and system for detecting abnormal oil level of an oil-immersed transformer body. Background technique [0002] Oil-immersed transformers use insulating oil as the main insulation method of the transformer and rely on oil as the cooling medium, such as oil-immersed self-cooling, oil-immersed air cooling, oil-immersed water cooling and forced oil circulation. Long-term oil leakage or a large amount of oil leakage, failure to replenish oil in time after maintenance and discharge, low temperature and insufficient oil storage in the oil conservator, etc., will cause the transformer oil level to be too low or seriously short of oil. In addition, clogging of the oil standard tube, sticking needle of the pointer oil level gauge, clogging of the vent hole of the explosion-proof tube, clogging of the respirator, accumulation of gas under the diaphragm or ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F23/14G01K13/00G01M3/26
CPCG01F23/14G01K13/00G01M3/26
Inventor 颜志敏李志龙赖皓周春阳洪乐洲李靖翔梁建瑜邓健俊刘羽超肖志超尹海涛
Owner GUANGZHOU BUREAU CSG EHV POWER TRANSMISSION
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