基于模糊层次分析法的变压器状态评估

摘要

The condition assessment of transformer is a systematic process,the appropriate method can evaluate the running status more accurately.Considering the characteristics of the transformer,a method of transformer condition evaluation based on fuzzy analytic hierarchy process is proposed.This method overcomes the defects of subjective factors when using fuzzy analytic hierarchy process,determines the fuzzy judgment matrix by historical statistics data and calculates weight by fuzzy analytic hierarchy process.After collecting the data of the field condition,it calculates the weighted sum of each layer,and finally determines the overall health status of the transformer.The method considers both the field measured data and historical statistics,the calculation result is accurate and the process is clear.The results calculated by the actual data shows that the method can accurately assess the health state of transformer and if the transformer is in abnormal condition,then the specific causes can be determined by analyzing the score of each fault type.This method shows broad application prospects in state evaluation of transformer.%变压器状态评估是一个系统的过程,选取合适的方法能够快速地对其运行状态进行准确的评价.综合变压器的特点提出了一种基于模糊层次分析法的变压器状态评估方法.该方法在合理运用模糊层次分析法的同时克服了主观因素的缺陷,通过历史统计数据确定模糊判断矩阵,并通过模糊层次分析法计算权重,采集现场状态量数据对各层次状态评分加权求和,最终确定变压器整体健康状态.此方法同时考虑现场实测数据和历史统计数据,计算结果准确,过程清晰.代入实际数据后,计算结果表明该方法能够准确评估变压器运行健康状态,若变压器处于非正常状态,则通过各故障类型打分分析判断具体异常原因.所提方法在进行变压器状态评估时具有广阔的应用前景.