Transformer vibration on-line monitoring system

Abstract

The invention discloses a transformer vibration on-line monitoring system. The system comprises vibration sensors, a dynamic signal acquisition device, a computer and a thermometer, wherein the vibration sensors, the dynamic signal acquisition device and the computer which are connected with one another sequentially. Since the transformer vibration on-line monitoring system has no electric connections with a whole electric conduction system, on-line monitoring can be carried out safely and reliably. According to the system, the plurality of vibration sensors are arranged at different positions of the surface of the oil tank of a transformer, so that a best measurement position can be obtained through comparison, and monitoring and analysis can be carried out according to various kinds of states of the transformer, and therefore, a large amount of data can be provided for diagnosis and analysis of the core and winding of the transformer. With the system adopted, accident hidden dangers of the transformer can be found timely; accidents can be avoided; the safety and reliability of the operation of the transformer can be improved; effective implementation of state maintenance can be and promoted; and economic efficiency can be improved. Thus, the transformer vibration on-line monitoring system is not only has important scientific value for the scientific and technological progress of the electric power industry, but also is of great significance for the improvement of the operational reliability and scientific management level of a power system.

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to an on-line monitoring system for transformer vibration. Background technique [0002] Transformers are expensive and important among various equipment in the power system. The faults of transformers have brought a great threat to the safe operation of the entire power grid. Therefore, actively carry out the diagnosis of transformer windings and iron core conditions, timely discover transformers with potential faults, and plan to carry out suspension cover verification and maintenance, which can reduce operating costs, prolong equipment life, prevent sudden accidents of transformers, and bring Good economic and social benefits. [0003] The vibration on the surface of the transformer oil tank is closely related to the compression state of the transformer winding and iron core, the displacement and deformation state of the winding. Therefore, it becomes possible to monitor ...

AI Technical Summary

Problems solved by technology

[0009] The main problems in the above two off-line methods are: the transformer must be out of operation; due to the wide range of natural vibration frequency of the transformer, the standards for judging the winding compaction state are different for transformers of different sizes and capacities; if the residual magnetic flux is very small, The result will become inaccurate and unstable; the other two methods can only detect the compaction of the winding, but cannot make a judgment on the condition of the core

[0014] In summary, there is currently no reliable means for online or offline monitoring and diagnosis of transformer winding status (looseness, deformation, etc.) at home and abroad

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