基于古林法和层次可拓的变压器状态评估

准确评估电力变压器的状态既是合理制定检修策略的基础,同时也对智能电网的发展具有重大意义。针对变压器故障机理复杂,难以客观评估的问题,提出了基于古林法和层次可拓的变压器状态评估方法,将变压器多参数综合评估转化为单目标决策。首先建立层次型指标体系,划分状态等级。利用古林法计算指标权重,通过层次可拓法确定综合评价等级,并与模糊层次分析法(FAHP)计算结果进行对比分析。经实例研究,验证了该方法应用于变压器状态评估的可行性,为变压器绝缘状态检修提供了一种新评估策略。

Transformer condition assessment based on A.J.Klee method and extension hierarchy

Accurate assessment of the power transformer condition is a basis for reasonable maintenance strategies, and is of great significance for smart grid development. Aiming at the transformer complex fault mechanism and the difficulty of objective assessment, a method of transformer condition assessment based on A.J.Klee method and extension hierarchy is proposed, which transforms transformer multi-parameter synthetic evaluation into single-object decision. First, the hierarchical index system is established, and the condition grade is divided. The weight of the index is calculated by A.J.Klee method. The comprehensive evaluation level is determined by the extension hierarchy, and the results are compared with the Fuzzy Analytic Hierarchy Process (FAHP). The feasibility of the method applied to the evaluation of transformer status is verified by an example, which provides a new assessment strategy for transformer insulation condition maintenance. This work is supported by National Natural Science Foundation of China (No. 51577046), State Key Program of National Natural Science Foundation of China (No. 51637004), and National Key Research and Development Plan "Important Scientific Instruments and Equipment Development" (No. 2016YFF0102200).