结合相关系数及改进层次分析法的油浸式变压器质量评估

Quality evaluation of oil-immersed transformer based on correlation coefficient and improved analytic hierarchy process

为全面和合理地评估油浸式变压器的质量水平,提出基于综合变权的层次分析法及相关系数的油浸式变压器质量评估方法。利用层次分析法(AHP)与反熵权法对变压器的各类定性及定量检测指标进行主、客观赋权,并修正得到各指标的综合可变权重,最终结合相关系数和模糊评价构建基于综合变权的油浸式变压器质量评估模型。模型评估结果与实际情况一致,能反映油浸式变压器中各指标间的关联性和相对重要性,对油浸式配电变压器质量评估工作具有参考意义。

In order to evaluate the quality level of oil-immersed transformers more comprehensively and reasonably,a quality evaluation method of oil-immersed transformer based on comprehensive variable weight analytic hierarchy process(AHP)and correlation coefficient is presented.In this work,AHP and anti-entropy weight method are used for quantitative and qualitative analysis of test data in oil-immersed transformer.Variable weights of multiple indicators are obtained by subjectively and objectively weighting and modification.Finally a quality evaluation model for oil-immersed transformers based on comprehensive variable is proposed by combining correlation coefficients and fuzzy evaluation.According to comparison,evaluation result based on this model is consistent with the real case.It shows a strong relevance and relative importance among indicators in the oil-immersed transformer to a certain extent,which has a certain significance for the quality evaluation on oil-immersed distribution transformers.