Oil immersed transformer state evaluation method

Abstract

The invention discloses an oil immersed transformer state evaluation method. The method includes constructing to-be-measured data to characterize the characteristics of an oil immersed transformer byusing the oil and gas data of the oil immersed transformer; obtaining fault oil immersed transformer data, and dividing six fault data clusters according to fault types; calculating the relative proximity of the to-be-measured data and the fault data clusters according to big data clustering thought; dividing an equipment state into a health state, a latent fault state or a fault state; judging the fault types of fault equipment on this basis, and calculating the health scores of the health equipment based on the fault type associating with weight; and obtaining the predicting fault development time of latent fault equipment through a time series similarity analysis method. Thus, the time inverting into the fault state can be accurately predicted, the hidden risks of the equipment can be found before fault occurs, and early detection and solution of equipment hidden danger can be realized.

Description

technical field [0001] The invention relates to the technical field of power system equipment reliability analysis, in particular to a state evaluation method of an oil-immersed transformer. Background technique [0002] A transformer is a device that uses the principle of electromagnetic induction to change the AC voltage. It has a common iron core and several windings cross-linked with it, and the spatial position between them remains unchanged. When a certain winding receives AC power from the power supply, it generates magnetism through inductance, and the electromagnetic induction principle of magnetic induction generates electricity changes the voltage, and transmits AC power at the same frequency and different voltages on the remaining windings. Transformers can be divided into dry-type transformers and oil-immersed transformers according to cooling methods. Among them, oil-immersed transformers are one of the important equipment in the power supply and distribution s...

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Problems solved by technology

[0004] For this reason, the purpose of the present invention is to propose a method for evaluating the state of an oil-immersed transformer, which solves the problem that the prior art cannot characterize the potential fault conditions of the oil-immersed transformer, nor can it determine the trend of the oil-immersed transformer transforming into a fault state.

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