Method for reducing oil flow electrified degree of transformer

Abstract

The invention discloses a method for reducing the oil flow electrified degree of a transformer. The method comprises the following steps of: acquiring a micro-water and air content and a chromatographic analysis result of transformer oil and a value of the oil flow electrified degree; establishing a grey system model of the micro-water and air content and the chromatographic analysis result of the transformer oil and the value of the oil flow electrified degree; determining the quantitative relation between the micro-water and air content and the chromatographic analysis result of the transformer oil and the oil flow electrified degree according to the acquired value and the established grey system model; and according to the determined quantitative relation, adjusting an operation parameter of the transformer so as to change the micro-water and air content and the chromatographic analysis result of the transformer oil and reduce the oil flow electrified degree of the transformer oil. According to the method for reducing the oil flow electrified degree of the transformer, which is provided by the invention, the micro-water and air content and the chromatographic analysis result parameters of the transformer oil, which have influence on the oil flow electrified degree of the transformer oil, can be determined, and the oil flow electrified degree of the transformer oil can be reduced by adjusting the operation parameters of the transformer.

Description

technical field [0001] The invention relates to the technical field of transformer oil flow electrification, in particular to a method for reducing the electrification degree of transformer oil flow. Background technique [0002] The so-called transformer oil flow electrification is a phenomenon that when the insulating oil flows inside the transformer at a certain flow rate, the electrostatic effect generated by friction between the oil flow and the surfaces of various parts of the insulation structure, which makes the surface of the solid insulation and the insulating oil electrified. The electrification of the oil flow can destroy the insulation performance of the oil passage, weaken the discharge ability of the free charge in the oil, and the electrostatic discharge (called oil flow discharge) will occur if the electrification is too high, causing accidents. There have been many cases of failures caused by oil flow electrification of large power transformers in foreign c...

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Problems solved by technology

After the transformer fails, it needs to be returned to the factory for repair. The freight and repair costs are more than one million yuan. At the same time, the economic loss caused by the lack of power generation is also in the millions of yuan.

Therefore, transformer failure not only brings unsafe factors to the power system, but also causes huge economic losses

[0004] At present, there is no effective method to solve the problem of oil flow electrification of transformers

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