采用改进层次分析法综合评估变压器微水量

Comprehen Sive Evaluation Micro-water of the Transformer Used by Improved Step Analysis Method

油纸绝缘电力变压器介质特性复杂,为了能更加全面科学地评估绝缘系统内部受潮状况,本文综合考虑多个时域特征量对变压器微水量的影响规律,提出了一种将改进层次分析法应用于变压器微水量诊断的方法。首先,本文对特征量进行“选取-分析-归类”;其次,基于改进层次分析法建立变压器微水量评估模型,并通过方案属性决策准则以及属性权重判断矩阵获得特征参数对诊断微水量的权重值,同时对需诊断变压器的特征参数进行归一化处理,获得综合评估值,从而分析得到新的综合诊断变压器微水量的判据;最后,通过实例验证了该判据的正确性与可行性。该评估方法为研究变压器绝缘状态提供了新的思路与手段。

The dielectric characteristics of oil paper insulated power transformer are complex.In order to evaluate the internal moisture condition of insulation system more comprehensively and scientifically,this paper comprehensively considers the influence of multiple time-domain characteristics on the micro water quantity of transformer,and proposes a method of applying the improved analytic hierarchy process to the micro water quantity diagnosis of transformer.Firstly,this paper carries out"selection analysis classification"on the characteristic quantity;secondly,based on the improved analytic hierarchy process,the evaluation model of transformer micro water quantity is established,and the weight value of the characteristic parameters to the diagnosis micro water quantity is obtained through the scheme attribute decision-making criteria and attribute weight judgment matrix.At the same time,the characteristic parameters of the transformer to be diagnosed are normalized to obtain the comprehensive evaluation value,so as to improve the efficiency Finally,the correctness and feasibility of the new criterion are verified by an example.The evaluation method provides a new idea and means for the study of transformer insulation state.