基于模糊综合评判的变压器套管绝缘状态评估

Insulation Condition Assessment of Transformer Bushing Based on Fuzzy Comprehensive Evaluation

针对变压器整体评估过于笼统的问题,构造模糊综合评判模型对变压器套管进行绝缘状态评估。针对常权模式容易使评判结果失真的问题,引入变权模式使评判结果更加接近套管的真实状况。采用降(升)半梯形分布函数作为确定关系模糊矩阵的隶属函数,应用级别特征值作为综合等级,确定套管所处的状态等级。通过实例分析,验证了模糊综合评判在变压器套管绝缘状态评估上的真实性和实用性。

To solve the problem that overall assessment of transformer is too general,a fuzzy comprehensive evaluation model is constructed for transformer bushing insulation condition assessment.Due to the fact that constant weight may cause distorted evaluation,the variable weight is introduced to make the evaluation results close to the actual condition of transformer bushing,and the semi-trapezoid distribution function is adopted as a membership function to determine the fuzzy matrix.The ranking eigenvalue is used as a comprehensive rank to determine the condition level of transformer bushing.The case study verifies that the fuzzy comprehensive evaluation is reliable and practical for transformer bushing condition assessment.