Power transformer defect precedent citing diagnosis method applying oil chromatography monitoring data

Abstract

The invention discloses a power transformer defect precedent citing diagnosis method applying oil chromatography monitoring data. Currently, transformer defect diagnosis is still a work demanding rich experience. Because of lack of an effective mathematical model, in an actual production process, the transformer defect diagnosis is mainly based on experience-based judgment of personnel for measuring, regulating and operating, and thus it is hard to make breakthroughs in both the diagnosis efficiency and accuracy. Aiming at the distribution characteristics of oil chromatography characteristic gas data, a normalization hypercube mapping method is put forward, and the oil chromatography data is mapped to a hypercube spatial area which can be directly applied; meanwhile, a precedent citing similarity algorithm and a diagnosis result judgment method which is based on weighting vote are put forward pertinently. According to the power transformer defect precedent citing diagnosis method applying the oil chromatography monitoring data, the power transformer defect diagnosis problem is solved, the analysis accuracy is improved, and the capacity of a power grid operation and maintenance department in processing the defects and faults of oil immersed type transformer equipment is promoted.

Description

technical field [0001] The invention relates to the fields of power transformer oil chromatographic monitoring data processing and defect diagnosis, and specifically relates to a defect diagnosis method that applies oil chromatographic monitoring data and defect case data, and pushes examples through numerical methods such as mapping, comparison, and weighting. Background technique [0002] With the rapid development of the power industry and the construction and operation of UHV AC and DC projects, power transformers and converter transformers as pivotal equipment are also developing in the direction of high voltage and large capacity. The large scale of key equipment has increased the impact of single equipment defect failures on the overall security of the power grid. Therefore, timely and effective assessment of the operating status of transformer equipment and accurate judgment of equipment defect types have become key issues in power grid operation and maintenance. Wit...

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is to overcome the modeling difficulties in the above-mentioned prior art, and provide a method for diagnosing defects of power transformers using oil chromatographic monitoring data to solve the problem of diagnosing defects of power transformers, improve the accuracy of diagnosis, and improve Power grid operation and maintenance department's ability to deal with defects and faults of oil-immersed transformer equipment

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